Question 1

What characteristic gives C₃ and C₄ plants their names?

Accepted Answer

A)  the sequence in which the carbon-containing molecules were discovered 
B)  the botanically assigned geographic coordinates where the plants are located 
C)  the first stable carbon compounds that are produced during the second portion of photosynthesis 
D)  the first carbon compounds that are produced during the light reactions of each type of plant 
A)  the sequence in which the carbon-containing molecules were discovered 
B)  the botanically assigned geographic coordinates where the plants are located 
C)  the first stable carbon compounds that are produced during the second portion of photosynthesis 
D)  the first carbon compounds that are produced during the light reactions of each type of plant

Question 2

-According to the graph, by how many parts per million has the concentration of atmospheric carbon dioxide changed between 1980 and 2010?

Accepted Answer

A)  about 20 ppm 
B)  about 50 ppm 
C)  about 80 ppm 
D)  about 110 ppm 
A)  about 20 ppm 
B)  about 50 ppm 
C)  about 80 ppm 
D)  about 110 ppm

Question 3

Which chloroplast structure increases the amount of surface area that is available for photosynthesis?

Accepted Answer

A)  stroma 
B)  chlorophyll 
C)  envelope 
D)  thylakoid 
A)  stroma 
B)  chlorophyll 
C)  envelope 
D)  thylakoid

Question 4

What situation would be most similar to the greenhouse effect?

Accepted Answer

A)  heating up the air inside a car by parking it in the sun 
B)  warming the air for a hot-air balloon with a propane burner 
C)  burning kerosene in a heater to warm up the air inside a cold house 
D)  growing plants in your office to reduce indoor air pollution 
A)  heating up the air inside a car by parking it in the sun 
B)  warming the air for a hot-air balloon with a propane burner 
C)  burning kerosene in a heater to warm up the air inside a cold house 
D)  growing plants in your office to reduce indoor air pollution

Question 5

How does carbon move through the carbon cycle?

Accepted Answer

A)  Carbon flows one way from volcanoes to plants to consumers and then to the atmosphere. 
B)  Carbon is recycled among plants, animals, water, soil, and the atmosphere. 
C)  Carbon dioxide (CO₂) is the only carbon-containing compound involved in the carbon cycle. 
D)  Exhaled carbon dioxide becomes trapped in the atmosphere, adding to the greenhouse effect. 
A)  Carbon flows one way from volcanoes to plants to consumers and then to the atmosphere. 
B)  Carbon is recycled among plants, animals, water, soil, and the atmosphere. 
C)  Carbon dioxide (CO₂) is the only carbon-containing compound involved in the carbon cycle. 
D)  Exhaled carbon dioxide becomes trapped in the atmosphere, adding to the greenhouse effect.

Question 6

When is oxygen produced during the light reactions?

Accepted Answer

A)  NADP⁺ is converted to NADPH. 
B)  CO₂ splits apart at the end of the light reactions. 
C)  Electrons reach the end of the electron transport chain. 
D)  Water is split to provide replacement electrons to chlorophyll. 
A)  NADP⁺ is converted to NADPH. 
B)  CO₂ splits apart at the end of the light reactions. 
C)  Electrons reach the end of the electron transport chain. 
D)  Water is split to provide replacement electrons to chlorophyll.

Question 7

What can happen to the carbon dioxide in the atmosphere?

Accepted Answer

A)  It can be released into space from the atmosphere. 
B)  It can be converted to glucose by plants. 
C)  It can be converted into carbon monoxide by the oceans. 
D)  It can react with nitrogen to form fossil fuels. 
A)  It can be released into space from the atmosphere. 
B)  It can be converted to glucose by plants. 
C)  It can be converted into carbon monoxide by the oceans. 
D)  It can react with nitrogen to form fossil fuels.

Question 8

Which types of plant stores carbon dioxide as an organic acid in its vacuoles?

Accepted Answer

A)  C₂ plants 
B)  C₃ plants 
C)  C₄ plants 
D)  CAM plants 
A)  C₂ plants 
B)  C₃ plants 
C)  C₄ plants 
D)  CAM plants

Question 9

How can deforestation increase global warming?

Accepted Answer

A)  It can decrease the total amount of photosynthesis as C₃ plants are harvested. 
B)  It can increase the number of C₄ plants, thereby increasing photorespiration. 
C)  It can cause runoff to become more acidic, thereby blocking the uptake of carbon dioxide. 
D)  It can increase the uptake of carbon dioxide by encouraging the growth of faster growing plants. 
A)  It can decrease the total amount of photosynthesis as C₃ plants are harvested. 
B)  It can increase the number of C₄ plants, thereby increasing photorespiration. 
C)  It can cause runoff to become more acidic, thereby blocking the uptake of carbon dioxide. 
D)  It can increase the uptake of carbon dioxide by encouraging the growth of faster growing plants.

Question 10

The planet Mercury is closer to the sun than the planet Venus. However, temperatures on Venus are hotter than temperatures on Mercury. Why would this be the case?

Accepted Answer

A)  Mercury has a thicker atmosphere than Venus that blocks heat from the sun. 
B)  Mercury spins more quickly than Venus, so its surface cannot heat up as quickly. 
C)  Venus has a thicker atmosphere than Mercury that traps heat from the sun. 
D)  Venus is cooled by high concentrations of water vapor in its atmosphere. 
A)  Mercury has a thicker atmosphere than Venus that blocks heat from the sun. 
B)  Mercury spins more quickly than Venus, so its surface cannot heat up as quickly. 
C)  Venus has a thicker atmosphere than Mercury that traps heat from the sun. 
D)  Venus is cooled by high concentrations of water vapor in its atmosphere.

Question 11

Which plant is most likely to be a C₄ plant?

Accepted Answer

A)  switchgrass 
B)  clover 
C)  rose 
D)  cactus 
A)  switchgrass 
B)  clover 
C)  rose 
D)  cactus

Question 12

Which human activity has directly contributed to global warming?

Accepted Answer

A)  burning of coal 
B)  building of greenhouses 
C)  planting of trees 
D)  development of solar energy 
A)  burning of coal 
B)  building of greenhouses 
C)  planting of trees 
D)  development of solar energy

Question 13

What is the thick fluid found inside chloroplasts?

Accepted Answer

A)  grana 
B)  stroma 
C)  chlorophyll 
D)  thylakoids 
A)  grana 
B)  stroma 
C)  chlorophyll 
D)  thylakoids

Question 14

What is the initial carbon-containing starting product in the Calvin cycle?

Accepted Answer

A)  glyceraldehyde 3-phosphate 
B)  glucose 
C)  ribulose bisphosphate 
D)  rubisco 
A)  glyceraldehyde 3-phosphate 
B)  glucose 
C)  ribulose bisphosphate 
D)  rubisco

Question 15

What is the role of NADP in photosynthesis?

Accepted Answer

A)  pick up and drop off electrons 
B)  phosphorylate ADP to ATP 
C)  convert carbon dioxide to rubisco 
D)  absorb sunlight energy 
A)  pick up and drop off electrons 
B)  phosphorylate ADP to ATP 
C)  convert carbon dioxide to rubisco 
D)  absorb sunlight energy

Question 16

What is the role of a CAM plant?

Accepted Answer

A)  It uses 4-carbon sugars to pump carbon dioxide molecules to the Calvin cycle. 
B)  It is often used in agriculture because of its ability to conserve water. 
C)  It slows water loss by opening stomata only at night. 
D)  It tends to grow very slowly because of its inability to undergo the Calvin cycle. 
A)  It uses 4-carbon sugars to pump carbon dioxide molecules to the Calvin cycle. 
B)  It is often used in agriculture because of its ability to conserve water. 
C)  It slows water loss by opening stomata only at night. 
D)  It tends to grow very slowly because of its inability to undergo the Calvin cycle.

Question 17

Which statement describes the greenhouse effect?

Accepted Answer

A)  Most life on Earth relies upon the hospitable temperatures resulting from the greenhouse effect. 
B)  The greenhouse effect is a dangerous phenomenon that should be stopped as soon as possible. 
C)  The greenhouse effect results from the presence of oxygen in the atmosphere. 
D)  Global warming is likely the result of a lessening of the greenhouse effect. 
A)  Most life on Earth relies upon the hospitable temperatures resulting from the greenhouse effect. 
B)  The greenhouse effect is a dangerous phenomenon that should be stopped as soon as possible. 
C)  The greenhouse effect results from the presence of oxygen in the atmosphere. 
D)  Global warming is likely the result of a lessening of the greenhouse effect.

Question 18

Almost all scientists support the idea that the global warming observed over the past 100 years has been caused by elevated levels of gases in the atmosphere. Which gas is primarily responsible for this problem?

Accepted Answer

A)  carbon dioxide 
B)  nitrous oxide 
C)  oxygen 
D)  ozone 
A)  carbon dioxide 
B)  nitrous oxide 
C)  oxygen 
D)  ozone

Question 19

What gas do plants release during photorespiration?

Accepted Answer

A)  water vapor 
B)  oxygen 
C)  carbon dioxide 
D)  carbon monoxide 
A)  water vapor 
B)  oxygen 
C)  carbon dioxide 
D)  carbon monoxide

Question 20

Which plants are best adapted for very dry, hot environments such as deserts?

Accepted Answer

A)  C₂ plants 
B)  C₃ plants 
C)  C₄ plants 
D)  CAM plants 
A)  C₂ plants 
B)  C₃ plants 
C)  C₄ plants 
D)  CAM plants

Exam 5: Life in the Greenhouse: Photosynthesis and Climate Change

What characteristic gives C₃ and C₄ plants their names?

-According to the graph, by how many parts per million has the concentration of atmospheric carbon dioxide changed between 1980 and 2010?

Which chloroplast structure increases the amount of surface area that is available for photosynthesis?

What situation would be most similar to the greenhouse effect?

How does carbon move through the carbon cycle?

When is oxygen produced during the light reactions?

What can happen to the carbon dioxide in the atmosphere?

Which types of plant stores carbon dioxide as an organic acid in its vacuoles?

How can deforestation increase global warming?

The planet Mercury is closer to the sun than the planet Venus. However, temperatures on Venus are hotter than temperatures on Mercury. Why would this be the case?

Which plant is most likely to be a C₄ plant?

Which human activity has directly contributed to global warming?

What is the thick fluid found inside chloroplasts?

What is the initial carbon-containing starting product in the Calvin cycle?

What is the role of NADP in photosynthesis?

What is the role of a CAM plant?

Which statement describes the greenhouse effect?

Almost all scientists support the idea that the global warming observed over the past 100 years has been caused by elevated levels of gases in the atmosphere. Which gas is primarily responsible for this problem?

What gas do plants release during photorespiration?

Which plants are best adapted for very dry, hot environments such as deserts?

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DNA Detective: Complex Patterns of Inheritance and Dna Profiling

Genetically Modified Organisms: Gene Expression, Mutation,

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An Evolving Enemy: Natural Selection

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The Greatest Species on Earth Biodiversity and Classification

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Clearing the Air: Respiratory and Cardiovascular Systems

Vaccination: Protection and Prevention or Peril Immune System,

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Is There Something in the Water Reproductive and Developmental Biology

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Growing a Green Thumb: Plant Physiology

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