Question 1

The action spectrum of photosynthesis shows a high light absorption for violet/blue and orange/red and a low absorption for green/yellow.If we were to set up an experiment where narrow bands of unicolored light were shown on an aquatic plant such as Elodea,and we counted the number of bubbles of oxygen produced as an indicator of photosynthetic rate,how would the graph appear?

Accepted Answer

A)  just like the action spectrum with peaks at violet/blue and orange/red and a trough at yellow/green
B)  exactly inverted from the action spectrum with a peak for yellow/green
C)  perfectly flat because many wavelengths are used by chlorophyll
D)  a descending line because ultra-violet has more energy than infra-red
E)  There is no way to guess without actually running the experiment.F) None of the above
G) C) and D)

Question 2

The major enzyme that 'fixes' carbon dioxide is called

Accepted Answer

A)  ribulose bisphosphate carboxylase (rubisco) .
B)  glyceraldehyde-3-phospate (G3P) .
C)  PEP carboxylase (PEPcase) .
D)  lactate dehydrogenase.E) B) and C)
F) A) and D)

Question 3

decreases cell carbon dioxide levels,which increases the diffusion gradient.

Accepted Answer

A) True 
 B)False

Question 4

immediately becomes a six-carbon sugar that is the base for starch,sucrose,cellulose,etc.

Accepted Answer

A) True 
 B)False

Question 5

G3P (glyceraldehyde 3 phosphate) is used by plants for all of the following EXCEPT the formation of

Accepted Answer

A)  fatty acids.
B)  amino acids.
C)  oxygen.
D)  sucrose.E) None of the above
F) A) and B) C

Question 6

If the Calvin cycle uses three molecules of CO2 to produce six molecules of G3P (glyceraldehydes-3-phosphate) ,but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?

Accepted Answer

A)  Any unused CO2 is released into the environment.
B)  The other five G3P molecules are used to regenerate more RuBP.
C)  Any unused G3P molecule is converted and stored as starch.
D)  The remaining five G3P molecules are used to reduce CO2.E) A) and B)
F) A) and C)

Question 7

Which statement is NOT true about the noncyclic electron pathway?

Accepted Answer

A)  Electrons are boosted to higher energy level in Photosystem I.
B)  Sunlight excites electrons in Photosystem II.
C)  It produces ATP.
D)  It produces NADPH.
E)  It produces carbohydrates through carbon dioxide fixation.F) All of the above
G) A) and D)

Question 8

is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Accepted Answer

A) True 
 B)False

Question 9

The function of sunlight in photosynthesis is to:

Accepted Answer

A)  reduce NADPH to NADP
B)  fix O2 in the Calvin cycle
C)  excite electrons in chlorophyll
D)  combine carbon dioxide and water to form ATP and NADPHE) C) and D)
F) None of the above

Question 10

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Accepted Answer

A) True 
 B)False  False

Question 11

Which statement is NOT true about photosystems?

Accepted Answer

A)  Photosystem I passes electrons on to Photosystem II.
B)  Each photosystem contains numerous pigment molecules that act as antennas to capture light.
C)  Photosystem I contains a reaction center molecule that loses electrons which are then replaced by electrons from water.
D)  Electrons in the reaction center molecule are excited by absorbed solar energy and are passed along to an acceptor molecule.E) B) and D)
F) None of the above

Question 12

Fossil fuels are full of energy stored from photosynthesis millions of years ago.

Accepted Answer

A) True 
 B)False

Question 13

_______ is a product of the Calvin Cycle that is used to form glucose phosphate,amino acids or fatty acids.

Accepted Answer

A)  ATP.
B)  ribulose bisphosphate (RuBP) .
C)  glyceraldehyde-3-phospate (G3P) .
D)  PEP carboxylase (PEPcase) .
E)  carbon dioxide.F) B) and D)
G) A) and D)

Question 14

When the stomata in a leaf close during the day,then

Accepted Answer

A)  carbon dioxide in the air spaces in the leaf decreases.
B)  oxygen in the air spaces in the leaf increases.
C)  C3 plants carry on photorespiration,using O2 and producing PGA and CO2.
D)  all photosystems as well as photorespiration come to a halt.
E)  All choices but the halting of photosystems are correct.F) A) and B)
G) A) and E)

Question 15

Which of these is NOT a major photosynthetic pigment in plants?

Accepted Answer

A)  chlorophyll a
B)  chlorophyll b
C)  chlorophyll c
D)  carotenoid pigmentsE) C) and D)
F) B) and D)

Question 16

What organisms are capable of photosynthesis?

Accepted Answer

A)  plants only
B)  plants and algae only
C)  plants and some bacteria only
D)  plants,algae,and some bacteriaE) C) and D)
F) A) and B) D

Question 17

To what does the term grana refer?

Accepted Answer

A)  the double membrane of the chloroplast
B)  a flattened disk or sac in the chloroplast
C)  a stack of thylakoid membrane structures
D)  the central fluid-filled space of the chloroplast
E)  the cytochrome system in the membranes of the thylakoidsF) D) and E)
G) All of the above

Question 18

Photorespiration occurs mainly in:

Accepted Answer

A)  C3 plants.
B)  C4 plants.
C)  CAM plants.
D)  all of the above.E) B) and C)
F) All of the above

Question 19

If plants were only able to undergo the cyclic pathway,which of the following would NOT be true?

Accepted Answer

A)  Plants would not produce oxygen.
B)  Carbohydrate could still be produced but in much smaller quantities.
C)  More NADPH would be produced during the cyclic electron pathway.
D)  ATP production would decrease due to a smaller amount of H+ being available.E) B) and C)
F) A) and B)

Question 20

Oxygen production in photosynthesis involves all of the following EXCEPT

Accepted Answer

A)  photosystem one.
B)  photosystem two.
C)  splitting of water.
D)  light reactions.E) A) and B)
F) None of the above

Exam 7: Photosynthesis

Correct Answer
verified

The major enzyme that 'fixes' carbon dioxide is called

Correct Answer
verified

decreases cell carbon dioxide levels,which increases the diffusion gradient.

Correct Answer
verified

immediately becomes a six-carbon sugar that is the base for starch,sucrose,cellulose,etc.

Correct Answer
verified

G3P (glyceraldehyde 3 phosphate) is used by plants for all of the following EXCEPT the formation of

Correct Answer
verified
C

If the Calvin cycle uses three molecules of CO₂ to produce six molecules of G3P (glyceraldehydes-3-phosphate) ,but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?

Correct Answer
verified

Which statement is NOT true about the noncyclic electron pathway?

Correct Answer
verified

is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Correct Answer
verified

The function of sunlight in photosynthesis is to:

Correct Answer
verified

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Correct Answer
verified
False

Which statement is NOT true about photosystems?

Correct Answer
verified

Fossil fuels are full of energy stored from photosynthesis millions of years ago.

Correct Answer
verified

_______ is a product of the Calvin Cycle that is used to form glucose phosphate,amino acids or fatty acids.

Correct Answer
verified

When the stomata in a leaf close during the day,then

Correct Answer
verified

Which of these is NOT a major photosynthetic pigment in plants?

Correct Answer
verified

What organisms are capable of photosynthesis?

Correct Answer
verified
D

To what does the term grana refer?

Correct Answer
verified

Photorespiration occurs mainly in:

Correct Answer
verified

If plants were only able to undergo the cyclic pathway,which of the following would NOT be true?

Correct Answer
verified

Oxygen production in photosynthesis involves all of the following EXCEPT

Correct Answer
verified

Exam 7: Photosynthesis

Correct AnswerverifiedShow Answer

The major enzyme that 'fixes' carbon dioxide is called

Correct AnswerverifiedShow Answer

decreases cell carbon dioxide levels,which increases the diffusion gradient.

Correct AnswerverifiedShow Answer

immediately becomes a six-carbon sugar that is the base for starch,sucrose,cellulose,etc.

Correct AnswerverifiedShow Answer

G3P (glyceraldehyde 3 phosphate) is used by plants for all of the following EXCEPT the formation of

Correct AnswerverifiedC

If the Calvin cycle uses three molecules of CO2 to produce six molecules of G3P (glyceraldehydes-3-phosphate) ,but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?

Correct AnswerverifiedShow Answer

Which statement is NOT true about the noncyclic electron pathway?

Correct AnswerverifiedShow Answer

is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Correct AnswerverifiedShow Answer

The function of sunlight in photosynthesis is to:

Correct AnswerverifiedShow Answer

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Correct AnswerverifiedFalse

Which statement is NOT true about photosystems?

Correct AnswerverifiedShow Answer

Fossil fuels are full of energy stored from photosynthesis millions of years ago.

Correct AnswerverifiedShow Answer

_______ is a product of the Calvin Cycle that is used to form glucose phosphate,amino acids or fatty acids.

Correct AnswerverifiedShow Answer

When the stomata in a leaf close during the day,then

Correct AnswerverifiedShow Answer

Which of these is NOT a major photosynthetic pigment in plants?

Correct AnswerverifiedShow Answer

What organisms are capable of photosynthesis?

Correct AnswerverifiedD

To what does the term grana refer?

Correct AnswerverifiedShow Answer

Photorespiration occurs mainly in:

Correct AnswerverifiedShow Answer

If plants were only able to undergo the cyclic pathway,which of the following would NOT be true?

Correct AnswerverifiedShow Answer

Oxygen production in photosynthesis involves all of the following EXCEPT

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

If the Calvin cycle uses three molecules of CO₂ to produce six molecules of G3P (glyceraldehydes-3-phosphate) ,but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified