Questõesde UEMG 2010

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Foram encontradas 56 questões
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UEMG 2010 - Inglês - Interpretação de texto | Reading comprehension, Advérbios e conjunções | Adverbs and conjunctions

The conjunction “although”, in the first paragraph, can be replaced by all the alternatives EXCEPT:

The Impact of the Gulf Oil Spill on the U.S.


www.freewebs.com/mathewstolte/oilspills.html. 21/06/2010


      Although the oil has been pouring into the Gulf of Mexico for months, the consequences of this larger than ever environmental disaster have yet to be fully examined and determined. Scientists and researchers have started to put together some of the puzzle pieces, and the impact of the Deepwater Horizon oil spill are likely to be big.

      North Americans will have fewer choices on the store shelves. The Gulf of Mexico is a huge shipping lane through which products of all shapes and sizes come into North America. From toys to clothes to cars to building materials, you may find that the selection at your local store begins to shrink as shipping lanes slow down as a result of the oil spill.

      Whether you’re taking a vacation or hoping to walk along the shore, you may be disappointed. Many beaches in the U.S.A. are now closing as clean-up efforts on removing oil slick from the sands. But the impact may be felt for quite some time as oil continues to wash up on shore.

      Many wildlife animals will be impacted by the oil spill. Oiled birds, otter, bald eagles, pelicans, turtles, fish, and dolphins are already washing up on shore, making the beach sights less than palatable for someone looking to see some pristine nature.

      Over time, molluscs like clams incorporate calcium into their shells throughout their lifetimes. But the heavy metals like nickel and vanadium from the petroleum industry and the resulting oil spill may be incorporated into the shells of these creatures. As other wildlife consumes these clams, they incorporate the toxins into their bodies, and on it goes as the heavy metals bio-accumulate in the food chain. This could have serious, long-term consequences for human health. 

      Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers. The Gulf of Mexico has been home-working on some of these projects, but with the massive oil spilling into that environment, the oysters could soon become tainted with chemicals, making them unsafe to eat.

      The Gulf of Mexico is also a nursery for species like shrimp that grow up in the estuaries. The oil that is taking over this natural environment will choke out the plants that make the estuaries so nutritious to shrimp. 

      According to the National Weather Service, a hurricane like Hurricane Katrina could have a devastating impact on New Orleans. Researchers expect 15 named storms to develop into 8 hurricanes, and with a well-placed hurricane, the oil could be pushed onto New Orleans shores, further impacting the already devastated region.

Adapted from http://www.thenewecologist.com (21/06/2010)

A
besides
B
however
C
in spite of
D
even though
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UEMG 2010 - Inglês - Vocabulário | Vocabulary, Interpretação de texto | Reading comprehension

In the sentence, “…the selection at your local store begins to shrink”, the verb to shrink means

The Impact of the Gulf Oil Spill on the U.S.


www.freewebs.com/mathewstolte/oilspills.html. 21/06/2010


      Although the oil has been pouring into the Gulf of Mexico for months, the consequences of this larger than ever environmental disaster have yet to be fully examined and determined. Scientists and researchers have started to put together some of the puzzle pieces, and the impact of the Deepwater Horizon oil spill are likely to be big.

      North Americans will have fewer choices on the store shelves. The Gulf of Mexico is a huge shipping lane through which products of all shapes and sizes come into North America. From toys to clothes to cars to building materials, you may find that the selection at your local store begins to shrink as shipping lanes slow down as a result of the oil spill.

      Whether you’re taking a vacation or hoping to walk along the shore, you may be disappointed. Many beaches in the U.S.A. are now closing as clean-up efforts on removing oil slick from the sands. But the impact may be felt for quite some time as oil continues to wash up on shore.

      Many wildlife animals will be impacted by the oil spill. Oiled birds, otter, bald eagles, pelicans, turtles, fish, and dolphins are already washing up on shore, making the beach sights less than palatable for someone looking to see some pristine nature.

      Over time, molluscs like clams incorporate calcium into their shells throughout their lifetimes. But the heavy metals like nickel and vanadium from the petroleum industry and the resulting oil spill may be incorporated into the shells of these creatures. As other wildlife consumes these clams, they incorporate the toxins into their bodies, and on it goes as the heavy metals bio-accumulate in the food chain. This could have serious, long-term consequences for human health. 

      Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers. The Gulf of Mexico has been home-working on some of these projects, but with the massive oil spilling into that environment, the oysters could soon become tainted with chemicals, making them unsafe to eat.

      The Gulf of Mexico is also a nursery for species like shrimp that grow up in the estuaries. The oil that is taking over this natural environment will choke out the plants that make the estuaries so nutritious to shrimp. 

      According to the National Weather Service, a hurricane like Hurricane Katrina could have a devastating impact on New Orleans. Researchers expect 15 named storms to develop into 8 hurricanes, and with a well-placed hurricane, the oil could be pushed onto New Orleans shores, further impacting the already devastated region.

Adapted from http://www.thenewecologist.com (21/06/2010)

A
to become huge.
B
to sink.
C
to hire.
D
to contract.
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UEMG 2010 - Inglês - Interpretação de texto | Reading comprehension

In the first paragraph, what is Deepwater Horizon ?

The Impact of the Gulf Oil Spill on the U.S.


www.freewebs.com/mathewstolte/oilspills.html. 21/06/2010


      Although the oil has been pouring into the Gulf of Mexico for months, the consequences of this larger than ever environmental disaster have yet to be fully examined and determined. Scientists and researchers have started to put together some of the puzzle pieces, and the impact of the Deepwater Horizon oil spill are likely to be big.

      North Americans will have fewer choices on the store shelves. The Gulf of Mexico is a huge shipping lane through which products of all shapes and sizes come into North America. From toys to clothes to cars to building materials, you may find that the selection at your local store begins to shrink as shipping lanes slow down as a result of the oil spill.

      Whether you’re taking a vacation or hoping to walk along the shore, you may be disappointed. Many beaches in the U.S.A. are now closing as clean-up efforts on removing oil slick from the sands. But the impact may be felt for quite some time as oil continues to wash up on shore.

      Many wildlife animals will be impacted by the oil spill. Oiled birds, otter, bald eagles, pelicans, turtles, fish, and dolphins are already washing up on shore, making the beach sights less than palatable for someone looking to see some pristine nature.

      Over time, molluscs like clams incorporate calcium into their shells throughout their lifetimes. But the heavy metals like nickel and vanadium from the petroleum industry and the resulting oil spill may be incorporated into the shells of these creatures. As other wildlife consumes these clams, they incorporate the toxins into their bodies, and on it goes as the heavy metals bio-accumulate in the food chain. This could have serious, long-term consequences for human health. 

      Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers. The Gulf of Mexico has been home-working on some of these projects, but with the massive oil spilling into that environment, the oysters could soon become tainted with chemicals, making them unsafe to eat.

      The Gulf of Mexico is also a nursery for species like shrimp that grow up in the estuaries. The oil that is taking over this natural environment will choke out the plants that make the estuaries so nutritious to shrimp. 

      According to the National Weather Service, a hurricane like Hurricane Katrina could have a devastating impact on New Orleans. Researchers expect 15 named storms to develop into 8 hurricanes, and with a well-placed hurricane, the oil could be pushed onto New Orleans shores, further impacting the already devastated region.

Adapted from http://www.thenewecologist.com (21/06/2010)

A
Underwater oil.
B
A cargo ship.
C
An oil platform.
D
A company.
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UEMG 2010 - Inglês - Interpretação de texto | Reading comprehension

According to the text, you can say that the oil spill will cause an impact on

The Impact of the Gulf Oil Spill on the U.S.


www.freewebs.com/mathewstolte/oilspills.html. 21/06/2010


      Although the oil has been pouring into the Gulf of Mexico for months, the consequences of this larger than ever environmental disaster have yet to be fully examined and determined. Scientists and researchers have started to put together some of the puzzle pieces, and the impact of the Deepwater Horizon oil spill are likely to be big.

      North Americans will have fewer choices on the store shelves. The Gulf of Mexico is a huge shipping lane through which products of all shapes and sizes come into North America. From toys to clothes to cars to building materials, you may find that the selection at your local store begins to shrink as shipping lanes slow down as a result of the oil spill.

      Whether you’re taking a vacation or hoping to walk along the shore, you may be disappointed. Many beaches in the U.S.A. are now closing as clean-up efforts on removing oil slick from the sands. But the impact may be felt for quite some time as oil continues to wash up on shore.

      Many wildlife animals will be impacted by the oil spill. Oiled birds, otter, bald eagles, pelicans, turtles, fish, and dolphins are already washing up on shore, making the beach sights less than palatable for someone looking to see some pristine nature.

      Over time, molluscs like clams incorporate calcium into their shells throughout their lifetimes. But the heavy metals like nickel and vanadium from the petroleum industry and the resulting oil spill may be incorporated into the shells of these creatures. As other wildlife consumes these clams, they incorporate the toxins into their bodies, and on it goes as the heavy metals bio-accumulate in the food chain. This could have serious, long-term consequences for human health. 

      Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers. The Gulf of Mexico has been home-working on some of these projects, but with the massive oil spilling into that environment, the oysters could soon become tainted with chemicals, making them unsafe to eat.

      The Gulf of Mexico is also a nursery for species like shrimp that grow up in the estuaries. The oil that is taking over this natural environment will choke out the plants that make the estuaries so nutritious to shrimp. 

      According to the National Weather Service, a hurricane like Hurricane Katrina could have a devastating impact on New Orleans. Researchers expect 15 named storms to develop into 8 hurricanes, and with a well-placed hurricane, the oil could be pushed onto New Orleans shores, further impacting the already devastated region.

Adapted from http://www.thenewecologist.com (21/06/2010)

A
the molluscs.
B
the wildlife animals.
C
the human beings.
D
all the above.
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UEMG 2010 - Inglês - Pronomes | Pronouns

In the sentence “Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers”, environmentalists and the populations of oysters can be respectively substituted by the pronouns

The Impact of the Gulf Oil Spill on the U.S.


www.freewebs.com/mathewstolte/oilspills.html. 21/06/2010


      Although the oil has been pouring into the Gulf of Mexico for months, the consequences of this larger than ever environmental disaster have yet to be fully examined and determined. Scientists and researchers have started to put together some of the puzzle pieces, and the impact of the Deepwater Horizon oil spill are likely to be big.

      North Americans will have fewer choices on the store shelves. The Gulf of Mexico is a huge shipping lane through which products of all shapes and sizes come into North America. From toys to clothes to cars to building materials, you may find that the selection at your local store begins to shrink as shipping lanes slow down as a result of the oil spill.

      Whether you’re taking a vacation or hoping to walk along the shore, you may be disappointed. Many beaches in the U.S.A. are now closing as clean-up efforts on removing oil slick from the sands. But the impact may be felt for quite some time as oil continues to wash up on shore.

      Many wildlife animals will be impacted by the oil spill. Oiled birds, otter, bald eagles, pelicans, turtles, fish, and dolphins are already washing up on shore, making the beach sights less than palatable for someone looking to see some pristine nature.

      Over time, molluscs like clams incorporate calcium into their shells throughout their lifetimes. But the heavy metals like nickel and vanadium from the petroleum industry and the resulting oil spill may be incorporated into the shells of these creatures. As other wildlife consumes these clams, they incorporate the toxins into their bodies, and on it goes as the heavy metals bio-accumulate in the food chain. This could have serious, long-term consequences for human health. 

      Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers. The Gulf of Mexico has been home-working on some of these projects, but with the massive oil spilling into that environment, the oysters could soon become tainted with chemicals, making them unsafe to eat.

      The Gulf of Mexico is also a nursery for species like shrimp that grow up in the estuaries. The oil that is taking over this natural environment will choke out the plants that make the estuaries so nutritious to shrimp. 

      According to the National Weather Service, a hurricane like Hurricane Katrina could have a devastating impact on New Orleans. Researchers expect 15 named storms to develop into 8 hurricanes, and with a well-placed hurricane, the oil could be pushed onto New Orleans shores, further impacting the already devastated region.

Adapted from http://www.thenewecologist.com (21/06/2010)

A
their and them.
B
they and them.
C
they and it.
D
them and they.
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UEMG 2010 - Inglês - Voz Ativa e Passiva | Passive and Active Voice

Which of the alternatives below is the CORRECT correspondent active voice form for the passive voice of the sentence “Many wildlife animals will be impacted by the oil spill”?

The Impact of the Gulf Oil Spill on the U.S.


www.freewebs.com/mathewstolte/oilspills.html. 21/06/2010


      Although the oil has been pouring into the Gulf of Mexico for months, the consequences of this larger than ever environmental disaster have yet to be fully examined and determined. Scientists and researchers have started to put together some of the puzzle pieces, and the impact of the Deepwater Horizon oil spill are likely to be big.

      North Americans will have fewer choices on the store shelves. The Gulf of Mexico is a huge shipping lane through which products of all shapes and sizes come into North America. From toys to clothes to cars to building materials, you may find that the selection at your local store begins to shrink as shipping lanes slow down as a result of the oil spill.

      Whether you’re taking a vacation or hoping to walk along the shore, you may be disappointed. Many beaches in the U.S.A. are now closing as clean-up efforts on removing oil slick from the sands. But the impact may be felt for quite some time as oil continues to wash up on shore.

      Many wildlife animals will be impacted by the oil spill. Oiled birds, otter, bald eagles, pelicans, turtles, fish, and dolphins are already washing up on shore, making the beach sights less than palatable for someone looking to see some pristine nature.

      Over time, molluscs like clams incorporate calcium into their shells throughout their lifetimes. But the heavy metals like nickel and vanadium from the petroleum industry and the resulting oil spill may be incorporated into the shells of these creatures. As other wildlife consumes these clams, they incorporate the toxins into their bodies, and on it goes as the heavy metals bio-accumulate in the food chain. This could have serious, long-term consequences for human health. 

      Environmentalists have been working on restoring the populations of oysters by reseeding certain reefs to boost their numbers. The Gulf of Mexico has been home-working on some of these projects, but with the massive oil spilling into that environment, the oysters could soon become tainted with chemicals, making them unsafe to eat.

      The Gulf of Mexico is also a nursery for species like shrimp that grow up in the estuaries. The oil that is taking over this natural environment will choke out the plants that make the estuaries so nutritious to shrimp. 

      According to the National Weather Service, a hurricane like Hurricane Katrina could have a devastating impact on New Orleans. Researchers expect 15 named storms to develop into 8 hurricanes, and with a well-placed hurricane, the oil could be pushed onto New Orleans shores, further impacting the already devastated region.

Adapted from http://www.thenewecologist.com (21/06/2010)

A
The oil spill will impact many wildlife animals.
B
Many wildlife animals are impacted by the oil spill.
C
The oil spill has impacted many wildlife animals.
D
Many wildlife animals were impacted by the oil spill.
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UEMG 2010 - Geografia - Coordenadas Geográficas, Cartografia

Com base no texto e considerando, especialmente, o mapa da África do Sul, assinale a alternativa que contém as coordenadas geográficas aproximadas das duas cidades citadas no texto, acima.

“O continente africano tem grande extensão latitudinal/longitudinal, cortado por três dos grandes paralelos terrestres: Equador, Trópico de Câncer e Trópico de Capricórnio, além do Meridiano de Greenwich. Em seu território há cinco diferentes fusos horários. Sua área estende-se de 37˚N até 34˚S e 51˚E até 18˚W. O continente é composto de 53 países reconhecidos internacionalmente, sendo que a África do Sul é um desses países, e tem como capital a cidade de Pretória e várias outras cidades importantes, como Port Elizabeth”.

(HTTP://pt.wikipedia.org/wiki em 25/06/2010)



A
25˚S 28˚E - 33˚S 26˚E
B
32˚S 29˚W - 30˚S 29˚E
C
17˚N 29˚E - 34˚N 24˚W
D
25˚S 27˚W - 34˚N 24˚E
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UEMG 2010 - Geografia - Meio Ambiente na Geografia, Mudanças climáticas

A descrição/ explicação do fenômeno citado está suscintamente e CORRETAMENTE apontada na alternativa:

FRIO - INVERNO COMEÇA HOJE SOB INFLUÊNCIA DO LA NIÑA


      “O inverno começa às 8h28min de hoje, com predomínio de tempo seco em boa parte do país como as regiões Sudeste e Centro Oeste, nos estados de Rondônia, Acre, sul do Pará e Amazonas e Tocantins.

      Segundo o Instituto Nacional de Meteorologia, a previsão é que durante a estação consolide-se a influência do fenômeno La Niña. Esse fenômeno, segundo o INMET, pode provocar temperaturas mais baixas em relação aos anos anteriores.

(Jornal o Tempo – BH segunda feira 21/06/2010)

A
O aquecimento das águas superficiais do Oceano Atlântico.
B
O aquecimento e resfriamento, simultâneos, das águas do Oceano Pacífico.
C
O resfriamento das águas superficiais do Oceano Indico.
D
O resfriamento das águas superficiais do Oceano Pacífico.
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UEMG 2010 - Geografia - Globalização

Com base no texto e considerando os principais aspectos da globalização atual, só é CORRETO afirmar que

Países desenvolvidos do G20 cortarão pela metade déficits até 2013.

      “Os países desenvolvidos do G20 se comprometeram, a cortar em pelo menos 50% seus déficits públicos até 2013, segundo a declaração final da cúpula deste grupo que reúne potências industrializadas e emergentes, celebrada em Toronto (Canadá).

      Líderes dos países do G20 alertaram que “falhar em implantar a consolidação onde for necessário minaria a confiança e obstruiria o crescimento”. “Refletindo este equilíbrio, as economias avançadas se comprometeram com planos orçamentários que diminuirão os déficits e estabilizarão ou reduzirão a dívida pública com base no PIB até 2016”, diz o texto do documento(...)”.

UOL Notícias – Folha de São Paulo – 27/06/2010

A
a economia mundial está se recuperando com bases sólidas, reduzindo assim as ondas de incertezas no comércio mundial.
B
o G20 se reuniu no ano passado, para discutir estratégias contra a recessão, tornando-se, desde então, o principal fórum coordenador de ações para vencer os desafios globais da economia.
C
o grupo das 20 principais economias ricas e emergentes do mundo quer reduzir em 3 anos um quarto dos seus déficits públicos.
D
os líderes, representantes do G20, consideram que já conseguiram reequilibrar a economia global, pois deixaram de contrair e gastar empréstimos nos fundos internacionais.
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UEMG 2010 - Geografia - Geografia Política

Com relação ao texto, acima, assinale a alternativa que traz a informação CORRETA sobre a problemática atual do Irã :

Irã anuncia a construção de mais reatores nucleares

       Mesmo sob sanções impostas pelo Conselho de Segurança da Organização das Nações Unidas (ONU), o Irã anunciou nesta quarta-feira (16) que irá construir mais uma série de reatores nucleares (...). Segundo as fontes iranianas os “poderosos reatores” serão utilizados em usinas destinadas à produção de medicamentos.

      O anúncio foi feito uma semana depois de o Conselho de Segurança da ONU impor uma série de sanções ao Irã. No entanto, o diretor-geral da organização de energia nuclear iraniana afirmou que o país “dispõe de mais de 50 anos de experiência em ciência e tecnologia nuclear” que deve ser aproveitada.

Fonte: Agência Brasil, 16/6/2010 – Texto adaptado 

A
A maior parte da comunidade internacional considera o Irã, com seu potencial nuclear, uma ameaça bélica para o mundo inteiro.
B
A produção de armas nucleares para produção de medicamentos é uma inovação tecnológica específica do Irã.
C
As armas nucleares iranianas representam um perigo somente para a paz entre os outros estados regionais e muçulmanos.
D
O programa nuclear iraquiano garante a utilização do enriquecimento de urânio, somente para fins pacíficos.
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UEMG 2010 - Geografia - Meio Ambiente na Geografia, Impactos e soluções nos meios natural e rural

Observe, com atenção, as imagens, a seguir:



Com base nas informações contidas nas ilustrações, acima, acerca das últimas enchentes no Nordeste, pode-se afirmar CORRETAMENTE que

A
as chuvas que caíram em Alagoas aumentaram o volume de água dos rios que seguem para Pernambuco, provocando cheias nos dois Estados.
B
as cidades alagadas possuem antigos gargalos de infraestrutura, como galerias pluviais obsoletas, que dificultam o escoamento das águas.
C
as frentes frias vindas do sul chegaram ao Nordeste e se dirigiram ao oceano, formando nuvens que, empurradas pelo vento, provocaram fortes chuvas no litoral de Pernambuco.
D
as mortes foram provocadas pela ocupação humana em áreas de risco e pelo aumento da impermeabilização do solo.
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UEMG 2010 - Biologia - Principais doenças endêmicas no Brasil, Qualidade de vida das populações humanas

Recentemente assistimos estarrecidos às imagens da destruição causada pelas chuvas e as enchentes no nordeste do Brasil, especialmente nos estados de Alagoas e Pernambuco. Após esse tipo de catástrofe é comum a solidariedade humana ajudar as populações necessitadas com doações de roupas, medicamentos, água e comida. As autoridades tomam medidas emergenciais de socorro e se preocupam muito com a prevenção de várias doenças que podem aumentar a sua incidência.

Nas alternativas abaixo, assinale aquela em que a doença nomeada NÃO tem relação com o fenômeno descrito e suas consequências.

A
Dengue
B
Cólera
C
Diabetes
D
Leptospirose
51df668a-b1
UEMG 2010 - Biologia - Sistema Circulatório Humano, Identidade dos seres vivos

A formação de coágulos é um processo natural que impede a ocorrência de hemorragias, entretanto a coagulação no interior dos vasos obstrui a circulação sanguínea. O coágulo se forma devido à transformação de uma proteína denominada fibrinogênio em outra proteína em forma de uma rede de malhas finíssimas denominada fibrina, que estanca a hemorragia. Veja, no esquema abaixo, a sequência de reações simplificadas que levam à formação da fibrina e à consequente coagulação do sangue:



Dentre os diversos fatores que podem provocar crises hemorrágicas, SÓ NÃO se inclui

A
a carência de vitamina K.
B
o baixo número de plaquetas.
C
o genótipo favorável ao daltonismo.
D
a cirrose hepática.
51dad911-b1
UEMG 2010 - Biologia - Vertebrados, Identidade dos seres vivos

Analise o seguinte cladograma, que mostra uma classificação filogenética de um grupo de vertebrados.


( Purves, W. K, Sadava, D, Orians,G. H e Heller, H. C. Vida – A Ciência da Biologia. Porto Alegre: Ed. Artmed, 2007 p. 436 )


De acordo com esse cladograma (ou árvore evolutiva) e outros conhecimentos sobre as características dos grupos de vertebrados, só NÃO É CORRETO afirmar que

A
as tartarugas e os crocodilianos possuem maior grau de parentesco evolutivo com as aves do que com as cobras e lagartos.
B
a endotermia demonstra maior grau de parentesco entre aves e mamíferos do que entre aves e outros répteis.
C
a árvore evolutiva evidencia que, em ramos diferentes, há maior grau de semelhança genética entre tartarugas e crocodilianos.
D
pela classificação tradicional, baseada em semelhanças anatômicas e fisiológicas, as tartarugas e os crocodilianos pertencem à mesma classe dos lagartos e cobras, enquanto que as aves pertencem a outra classe.
51d757ea-b1
UEMG 2010 - Biologia - Ciclos biogeoquímicos, Ecologia e ciências ambientais

Analise, abaixo, o ciclo de um elemento químico:



Das substâncias a seguir, assinale a única que NÃO possui o elemento evidenciado pelo ciclo.

A
Glicose
B
DNA
C
Aminoácido
D
ATP
51d3fd6b-b1
UEMG 2010 - Biologia - Sistema Excretor Humano, Identidade dos seres vivos

Considere a imagem, a seguir:



NÃO é uma função da estrutura mostrada, acima

A
a regulação da pressão sanguínea
B
a secreção de hormônio anti-diurético.
C
a eliminação de resíduos metabólicos.
D
a filtração da fração solúvel do sangue.
51ccded6-b1
UEMG 2010 - Química - Química Orgânica, Propriedades Físicas dos Compostos Orgânicos: Polaridade das Ligações e Moléculas, Forças Intermoleculares, Ponto de Fusão e Ponto de Ebulição, Solubilização das Substâncias Orgânicas., Polímeros - Plásticos e Borrachas

Um estudante gotejou água sobre diferentes tipos de papel e plástico. Ele observou diferenças na velocidade de absorção da água por esses materiais e também verificou que alguns deles não absorvem água.

A seguir apresentamos as estruturas da celulose, do polietileno e da água.



Considerando-se as informações do texto e das estruturas ilustradas, é CORRETO afirmar que

A
as ligações iônicas possibilitam a interação entre papel e água.
B
o polietileno apresenta ligações covalentes entre suas moléculas.
C
as interações intermoleculares são responsáveis pela absorção de água pela celulose.
D
o caráter apolar da água permite sua interação com diferentes tipos de plásticos.
51d06127-b1
UEMG 2010 - Biologia - Hereditariedade e diversidade da vida, Introdução à genética: 1ª e 2ª leis de Mendel

A hipercolesterolemia familiar é uma doença genética associada à deficiência do metabolismo lipídico, nomeadamente o transporte e metabolismo do colesterol. É uma doença com transmissão autossômica dominante. Um indivíduo heterozigoto tem 50% de probabilidade de transmissão do alelo para seu descendente. Indivíduos homozigóticos para o alelo, geralmente, morrem em poucos anos de vida, devido à forma grave da doença, caracterizada por hipercolesterolemia precoce. A dieta alimentar, bem como outros hábitos vitais, pode controlar a doença.

Analise, a seguir, o heredograma para um caso de hipercolesterolemia familiar.

Legenda:

Morte por forma grave

Afetados

Desconhecido

Normais



Considerando as informações fornecidas no heredograma e outros conhecimentos sobre o assunto, afirma-se corretamente que a probabilidade do casal II-3 X II-4 ter uma criança com hipercolesterolemia grave será correspondente a

A
2/3
B
1/4
C
1/6
D
1/2
51c07104-b1
UEMG 2010 - Química - Transformações Químicas, Teoria Atômica: Modelo atômico de Dalton, Thomson, Rutherford, Rutherford-Bohr

Em 1911, o renomado cientista Ernest Rutherford e seus colaboradores Marsden e Geiger realizaram uma série de experimentos com materiais que emitiam partículas alfa (α). Os resultados obtidos levaram esse pesquisador a sugerir um novo modelo para o átomo. A figura a seguir representa, esquematicamente, um desses experimentos.



Sobre os motivos que levaram Rutherford a realizar esses experimentos e as conclusões que ele obteve, foram feitas as afirmações:

I. Rutherford concordava com o modelo atômico sugerido por Thomson e, por isso, esperava que todas as partículas alfa(α) atravessassem a placa de ouro com facilidade.

II. O modelo atômico proposto por Rutherford sugere que o átomo é eletricamente neutro, apesar de ser constituído por partículas positivas e negativas.

III. Rutherford desenvolveu esses experimentos porque estudava o comportamento dos prótons e elétrons que constituem a placa de ouro.


Assinale a alternativa em que foram apontadas as afirmativas CORRETAS.

A
I e II
B
I e III
C
II e III
D
I, II e III
51c47f6d-b1
UEMG 2010 - Química - Substâncias e suas propriedades, Transformações Químicas: elementos químicos, tabela periódica e reações químicas, Transformações Químicas e Energia, Fórmulas, Balanceamento e Leis ponderais das reações químicas, Transformações Químicas, Interações Atômicas: Geometria Molecular, Polaridade da ligação e da Molécula, Forças Intermoleculares e Número de Oxidação., Termoquímica: Energia Calorífica, Calor de reação, Entalpia, Equações e Lei de Hess., Representação das transformações químicas

O besouro-bombardeiro consegue afastar seus predadores, lançando sobre eles um jato quente e repelente de quinona, substância produzida em seu abdômen, através da reação química entre hidroquinina e peróxido de hidrogênio. O fenômeno pode ser representado pela equação:


C6 H6 O2(aq) + H2O2(aq) → C6 H4O2(aq) + 2H2 O ∆H = –204 kJ/mol

Hidroquinona Quinona


Sobre a produção de 0,01 mol de quinona, é INCORRETO afirmar que

A
são consumidos 1,1 g de hidroquinona.
B
são liberados 2,04 kJ de energia.
C
o oxigênio do H2 O2 sofre redução.
D
o hidrogênio perde elétron no processo.