Question 1

Over time,what would we expect in the evolution of C3,C4,and CAM strategies?

Accepted Answer

A)   As the most complicated plants, CAM plants are most likely to go extinct.
B)   As the probable ancestral form of photosynthesis, C3 plants are primitive and most likely to go extinct.
C)   Because CAM plants make better usage of metabolism during the night, they are superior and will eventually become the dominant plants.
D)   Because CO2 is delivered by the bundle sheath cells in C4 plants, they are superior and will eventually dominate.
E)   Each form of photosynthesis has advantages in a heterogeneous world and as long as environmental conditions vary, all forms will have an adaptive advantage in their unique niche.F) A) and B)
G) B) and E)

Question 2

In the Calvin cycle,the 3-carbon molecule that will be immediately formed after carbon dioxide fixation occurs is

Accepted Answer

A)   PS I.
B)   glucose.
C)   3PG.
D)   G3P.
E)   RuBP.F) D) and E)
G) A) and B) C

Question 3

Which of the following organisms will not have a dependency on photosynthesis for their energy?

Accepted Answer

A)   white tailed deer
B)   wolves
C)   squirrels
D)   raccoons
E)   All of these will have a dependency on photosynthesis.F) All of the above
G) A) and C)

Question 4

Heterotrophs

Accepted Answer

A)   have the ability to synthesize organic molecules from inorganic molecules.
B)   are ultimately dependent upon preformed organic molecules made by producers.
C)   are the origin of all food for the rest of the living world.
D)   are also called autotrophs.
E)   None of these features are characteristic of heterotrophs.F) C) and D)
G) A) and B)

Question 5

The hydrocarbon skeleton used to form fatty acids,glycerol,and amino acids (when N is added) are derived from

Accepted Answer

A)   starch.
B)   sucrose.
C)   cellulose.
D)   G3P.
E)   glucose phosphate.F) A) and B)
G) B) and E)

Question 6

In what ways are photosynthesis and cellular respiration not alike?

Accepted Answer

A)   Both will use the electron carrier NADH.
B)   Both require ATP.
C)   Both require a membrane.
D)   Both require a cyclical enzymatic pathway.
E)   Both require an electron transport chain.F) B) and E)
G) B) and C)

Question 7

The cyclic electron pathway produces only

Accepted Answer

A)   NADPH.
B)   ATP.
C)   NAD+.
D)   oxygen.
E)   carbon dioxide.F) C) and D)
G) All of the above

Question 8

Which of the following statements comparing the ATP synthase complex in cellular respiration and photosynthesis is not true?

Accepted Answer

A)   Both require the movement of H+ from inside a compartment to outside of the compartment.
B)   Both produce ATP.
C)   Both work via chemiosmosis.
D)   Both require a H+ gradient.
E)   Both are located in a membrane.F) A) and B)
G) A) and E) A

Question 9

An early experiment by Van Helmont (1600s) describes how he grew a tree in a large pot and found that after five years,the amount of soil in the pot had not changed.He concluded that the increase in weight was due to the addition of water.At that time,the compounds of the air had not yet been identified.Today,it is known that he only discovered half the story.Which of these experiments would NOT provide evidence that materials from a source other than water were involved in photosynthesis?

Accepted Answer

A)   Carbon is discovered as a major element in trees and is lacking in water molecules.
B)   Radioactive carbon in carbon dioxide in the air is identified as part of tree structures.
C)   A very careful analysis of the water taken in and lost by the tree would have revealed only part of the added weight gained by the tree.
D)   After adding radioactive water with labeled oxygen to a plant, radioactive oxygen is given off.
E)   Radioactive carbon is found in stored glucose molecules after supplying a plant with radioactive carbon dioxide.F) A) and E)
G) B) and C)

Question 10

Some herbicides inhibit the electron transport chain in the thylakoid membrane.Without the movement of electrons,hydrogen ions would not be pumped from the stroma to the thylakoid space and the hydrogen ion gradient would not be established.How would this affect the Calvin cycle reactions?

Accepted Answer

A)   ATP would not be produced and as a result, the Calvin cycle reactions would not occur.
B)   CO2 would not enter the cell as a result and the Calvin cycle reactions would not occur.
C)   RuBP carboxylase would not function properly so CO2 fixation would not occur.
D)   Sunlight could no longer be used by the chloroplast, but this would have no effect on the Calvin cycle reactions because they do not require light.
E)   Since the Calvin cycle reactions occur in a different part of the chloroplast, there would be no effect.F) B) and D)
G) A) and B)

Question 11

The heavy oxygen isotope (18O) could be provided to plants either in the CO2 or in H2O or in both.Today,we know from experimental results that O2 released from chloroplasts comes from H2O and not from CO2.Which of the following experimental results supports this finding?

Accepted Answer

A)   When heavy oxygen is part of water given to the plant, the plant produces heavy O2.
B)   When heavy oxygen is part of CO2 given to the plant, the plant produces heavy O2.
C)   When heavy oxygen is part of both water and CO2 given a plant, the plant produces heavy O2.
D)   When no heavy oxygen is part of water given the plant, the plant produces no heavy O2.
E)   When no heavy oxygen is part of CO2 given the plant, the plant produces no heavy O2.F) A) and E)
G) B) and C)

Question 12

Which statement is not true about C3 and C4 plants?

Accepted Answer

A)   C4 plants are more successful in hot climates than C3 plants.
B)   C3 plants fix carbon dioxide in the mesophyll cells.
C)   In C3 plants, O2 competes with CO2 for the active site of RuBP carboxylase.
D)   C4 plants deliver CO2 to the Calvin cycle using bundle sheath cells sheltered from leaf air spaces.
E)   CO2 is fixed at night to decrease water loss.F) B) and C)
G) A) and E)

Question 13

We set up an experiment where the same species of plant is grown in boxes covered with plastic that only allows a single color of light.In which box would we expect the least plant growth and even perhaps the death of the plant to occur?

Accepted Answer

A)   white
B)   blue
C)   red
D)   green
E)   indigoF) A) and D)
G) D) and E)

Question 14

Why are plant leaves green?

Accepted Answer

A)   They absorb only green wavelengths of light.
B)   They absorb only yellow and blue wavelengths of light.
C)   They reflect nearly all wavelengths of light.
D)   They reflect green wavelengths of light.
E)   They reflect yellow and blue wavelengths of light.F) C) and D)
G) A) and E)

Question 15

During photosynthesis,CO2 is reduced.This means that

Accepted Answer

A)   the molecule gains electrons.
B)   CO2 is broken down into two smaller molecules.
C)   the molecule loses electrons.
D)   the molecule loses protons.
E)   CO2 is released into the environment.F) A) and D)
G) A) and C) A

Question 16

What are the stages of the Calvin cycle?

Accepted Answer

A)   carbon dioxide fixation and reduction
B)   carbon dioxide fixation and regeneration of RuBP
C)   the noncyclic electron pathway and the cyclic electron pathway
D)   the light reactions, regeneration of RuBP, and cyclic electron pathway
E)   carbon dioxide fixation, carbon dioxide reduction, and regeneration of RuBPF) A) and B)
G) B) and E)

Question 17

Which cofactor is involved in the Calvin cycle reactions?

Accepted Answer

A)   NAD+
B)   FAD
C)   NADP+
D)   both NAD+ and FAD
E)   both FAD and NADP+F) A) and B)
G) B) and E)

Question 18

Which pathway is the foundation for the majority of ecosystems and food chains on Earth?

Accepted Answer

A)   photosynthesis
B)   anaerobic respiration
C)   aerobic respiration
D)   chemosynthesis
E)   decompositionF) A) and B)
G) None of the above

Question 19

Which statement is accurate about how C4 plants are able to survive hot dry spells during the growing season?

Accepted Answer

A)   When the stomata close during heat stress RuBP carboxylase is not exposed to the increase in oxygen concentration experienced in the leaf. This allows the plant to avoid photorespiration.
B)   When the stomata close during heat stress RuBP carboxylase is exposed to the increase in oxygen concentration experienced in the leaf. This allows the plant to avoid photorespiration.
C)   When the stomata open during heat stress RuBP carboxylase is not exposed to the increase in oxygen concentration experienced in the leaf. This allows the plant to avoid photorespiration.
D)   When the stomata close during heat stress RuBP carboxylase is exposed to the increase in oxygen concentration experienced in the leaf. This allows the plant to undergo photorespiration.
E)   When the stomata open during heat stress RuBP carboxylase is not exposed to the increase in oxygen concentration experienced in the leaf. This allows the plant to undergo photorespiration.F) C) and E)
G) B) and D)

Question 20

Which part of photosynthesis does not occur inside the thylakoid membrane?

Accepted Answer

A)   noncyclic electron pathway
B)   cyclic electron pathway
C)   electron transport chain
D)   light reactions
E)   Calvin cycle reactionsF) C) and E)
G) A) and C)

Exam 8: Photosynthesis

Over time,what would we expect in the evolution of C₃,C₄,and CAM strategies?

Correct Answer
verified

In the Calvin cycle,the 3-carbon molecule that will be immediately formed after carbon dioxide fixation occurs is

Correct Answer
verified
C

Which of the following organisms will not have a dependency on photosynthesis for their energy?

Correct Answer
verified

Heterotrophs

Correct Answer
verified

The hydrocarbon skeleton used to form fatty acids,glycerol,and amino acids (when N is added) are derived from

Correct Answer
verified

In what ways are photosynthesis and cellular respiration not alike?

Correct Answer
verified

The cyclic electron pathway produces only

Correct Answer
verified

Which of the following statements comparing the ATP synthase complex in cellular respiration and photosynthesis is not true?

Correct Answer
verified
A

Correct Answer
verified

Some herbicides inhibit the electron transport chain in the thylakoid membrane.Without the movement of electrons,hydrogen ions would not be pumped from the stroma to the thylakoid space and the hydrogen ion gradient would not be established.How would this affect the Calvin cycle reactions?

Correct Answer
verified

The heavy oxygen isotope (¹⁸O) could be provided to plants either in the CO₂ or in H₂O or in both.Today,we know from experimental results that O₂ released from chloroplasts comes from H₂O and not from CO₂.Which of the following experimental results supports this finding?

Correct Answer
verified

Which statement is not true about C₃ and C₄ plants?

Correct Answer
verified

We set up an experiment where the same species of plant is grown in boxes covered with plastic that only allows a single color of light.In which box would we expect the least plant growth and even perhaps the death of the plant to occur?

Correct Answer
verified

Why are plant leaves green?

Correct Answer
verified

During photosynthesis,CO₂ is reduced.This means that

Correct Answer
verified
A

What are the stages of the Calvin cycle?

Correct Answer
verified

Which cofactor is involved in the Calvin cycle reactions?

Correct Answer
verified

Which pathway is the foundation for the majority of ecosystems and food chains on Earth?

Correct Answer
verified

Which statement is accurate about how C₄ plants are able to survive hot dry spells during the growing season?

Correct Answer
verified

Which part of photosynthesis does not occur inside the thylakoid membrane?

Correct Answer
verified

Exam 8: Photosynthesis

Over time,what would we expect in the evolution of C3,C4,and CAM strategies?

Correct AnswerverifiedShow Answer

In the Calvin cycle,the 3-carbon molecule that will be immediately formed after carbon dioxide fixation occurs is

Correct AnswerverifiedC

Which of the following organisms will not have a dependency on photosynthesis for their energy?

Correct AnswerverifiedShow Answer

Heterotrophs

Correct AnswerverifiedShow Answer

The hydrocarbon skeleton used to form fatty acids,glycerol,and amino acids (when N is added) are derived from

Correct AnswerverifiedShow Answer

In what ways are photosynthesis and cellular respiration not alike?

Correct AnswerverifiedShow Answer

The cyclic electron pathway produces only

Correct AnswerverifiedShow Answer

Which of the following statements comparing the ATP synthase complex in cellular respiration and photosynthesis is not true?

Correct AnswerverifiedA

Correct AnswerverifiedShow Answer

Some herbicides inhibit the electron transport chain in the thylakoid membrane.Without the movement of electrons,hydrogen ions would not be pumped from the stroma to the thylakoid space and the hydrogen ion gradient would not be established.How would this affect the Calvin cycle reactions?

Correct AnswerverifiedShow Answer

The heavy oxygen isotope (18O) could be provided to plants either in the CO2 or in H2O or in both.Today,we know from experimental results that O2 released from chloroplasts comes from H2O and not from CO2.Which of the following experimental results supports this finding?

Correct AnswerverifiedShow Answer

Which statement is not true about C3 and C4 plants?

Correct AnswerverifiedShow Answer

We set up an experiment where the same species of plant is grown in boxes covered with plastic that only allows a single color of light.In which box would we expect the least plant growth and even perhaps the death of the plant to occur?

Correct AnswerverifiedShow Answer

Why are plant leaves green?

Correct AnswerverifiedShow Answer

During photosynthesis,CO2 is reduced.This means that

Correct AnswerverifiedA

What are the stages of the Calvin cycle?

Correct AnswerverifiedShow Answer

Which cofactor is involved in the Calvin cycle reactions?

Correct AnswerverifiedShow Answer

Which pathway is the foundation for the majority of ecosystems and food chains on Earth?

Correct AnswerverifiedShow Answer

Which statement is accurate about how C4 plants are able to survive hot dry spells during the growing season?

Correct AnswerverifiedShow Answer

Which part of photosynthesis does not occur inside the thylakoid membrane?

Correct AnswerverifiedShow Answer

Over time,what would we expect in the evolution of C₃,C₄,and CAM strategies?

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

The heavy oxygen isotope (¹⁸O) could be provided to plants either in the CO₂ or in H₂O or in both.Today,we know from experimental results that O₂ released from chloroplasts comes from H₂O and not from CO₂.Which of the following experimental results supports this finding?

Correct Answer
verified

Which statement is not true about C₃ and C₄ plants?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

During photosynthesis,CO₂ is reduced.This means that

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which statement is accurate about how C₄ plants are able to survive hot dry spells during the growing season?

Correct Answer
verified

Correct Answer
verified