Question 1

The beautiful fall leaves get their orange and yellow colors from carotenoids.

Accepted Answer

A) True 
 B)False

Question 2

When does a C4plant use rubisco?

Accepted Answer

A)   daytime only
B)   nighttime only
C)   summer only
D)   winter only
E)   anytime the Calvin cycle is occurringF) C) and D)
G) C) and E)

Question 3

What is the fate of electrons from NADPH during the Calvin cycle?

Accepted Answer

A)   They are accepted by molecular oxygen, just like in cellular respiration.
B)   They are used to regenerate RuBP from G3P
C)   They are added to 3PGA.
D)   They are transferred to rubisco.
E)   They remain on NADPH to help drive the light reactionsF) D) and E)
G) None of the above

Question 4

What is the source of electrons for carbon fixation in plants?

Accepted Answer

A)   O2
B)   CO2
C)   H2O
D)   H+
E)   C6H12O6F) A) and B)
G) B) and E)

Question 5

Rubisco's enzymatic activity is stimulated by NADP+and ADP.

Accepted Answer

A) True 
 B)False

Question 6

In the C4pathway, which molecule is formed after the addition of CO2to PEP?

Accepted Answer

A)   phosphoenolpyruvate
B)   malate
C)   oxaloacetate
D)   pyruvate
E)   3PGAF) A) and D)
G) A) and C)

Question 7

Fluorescence occurs when ____.

Accepted Answer

A)   a high-energy electron returns to its ground state by releasing energy in a photon
B)   a low-energy electron moves to a high-energy state by absorbing heat
C)   a high-energy electron leaves its nucleus and moves to a different molecule
D)   a pigment molecule accepts a high-energy electron and releases a photon of energy
E)   the energy from an electron is transferred to a different molecule while the electron returns to the ground stateF) C) and D)
G) B) and C)

Question 8

Which statement correctly summarizes the two phases of photosynthesis?

Accepted Answer

A)   The light-dependent reactions occur in the cytosol; the light-independent reactions occur in the stroma.
B)   The products of the light-dependent reactions are ATP, NADPH, and O2; the products of the light-independent reactions are ADP, NADP+, and sugar.
C)   The light-dependent reactions occur only during the daylight hours; the light-independent reactions occur only when it is dark.
D)   The light-dependent reactions produce water as a by-product; the light-independent reactions produce carbon dioxide as a waste product.
E)   The products of the light-dependent reactions are ADP, NADP+, and O2; the products of the light-independent reactions are ATP, NADPH, and sugar.F) B) and C)
G) A) and E)

Question 9

The C4cycle ____.

Accepted Answer

A)   replaces the second stage of the Calvin cycle
B)   supplements the activity of rubisco by providing a second source of 3PGA for the reduction stage of the Calvin cycle
C)   is more efficient than the Calvin cycle because less ATP is consumed in the process
D)   ensures that CO2is provided to rubisco and thus prevents photorespiration
E)   is most commonly associated with plants living in humid climatesF) C) and D)
G) A) and E)

Question 10

Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the other eight are small. What is the function of the small subunits?

Accepted Answer

A)   The small subunits contain the reactant binding sites.
B)   They stabilize the overall enzyme's structure but have no intrinsic function.
C)   The function of the small subunits is still unknown.
D)   They regulate the enzyme's rate of catalysis.
E)   The small subunits contain allosteric regulator binding sites.F) None of the above
G) D) and E)

Question 11

Cyclic electron flow generates ATP and O2, but not NADPH.

Accepted Answer

A) True 
 B)False

Question 12

Orchids, which grow well in regions that are hot and dry during the day and cool at night, are classified as CAM plants.

Accepted Answer

A) True 
 B)False

Question 13

Match between columns
                        Premises: where you would search for rubisco
thylakoid membrane
inner membrane
site of light-dependent reactions
membrane most important in generating a proton gradient for ATP synthesis
site of light-independent reactions
stroma
outer membrane
thylakoid lumen

Accepted Answer

The Answer of B and D and E and C is...

Question 14

Which event probably made the evolution of cellular respiration possible?

Accepted Answer

A)   accumulation of carbon dioxide in atmosphere
B)   emergence of prokaryotes
C)   accumulation of oxygen in atmosphere
D)   emergence of eukaryotes
E)   emergence of plantsF) A) and D)
G) B) and D)

Question 15

Why isn't the oxygenase function of rubisco active under normal environmental conditions?

Accepted Answer

A)   The oxygenase activity of the enzyme requires more energy.
B)   The affinity of the enzyme favors the binding of CO2.
C)   The oxygenase activity of the enzyme is inhibited by O2.
D)   The binding site of the enzyme is allosterically inhibited under normal conditions.
E)   The oxygenase binding site has a higher affinity for ATP.F) B) and D)
G) A) and C)

Question 16

I'm a botanist looking for new species of C4plants. Where should I focus my search?

Accepted Answer

A)   Maine
B)   Quebec, Canada
C)   equatorial rainforest
D)   The Everglades (in Florida) 
E)   ArizonaF) A) and E)
G) B) and D)

Question 17

Suppose you explored a new planet and found a photosynthetic organism unlike any on Earth. You repeat Engelmann's classic experiment using this new organism in place of Spirogyra and find that oxygen-dependent bacteria cluster near the green and yellow portions of the spectrum. What does this tell you?

Accepted Answer

A)   The sun of this new planet emits different wavelengths of light than our own.
B)   This new organism is using yellow and green light to drive photosynthesis.
C)   This organism appears green, just like plants on Earth.
D)   This organism utilizes the most energy-rich photons of the spectrum.
E)   This new organism is using blue and red light to drive photosynthesis.F) B) and E)
G) C) and D)

Question 18

Why is Rubisco present in high concentrations in leaves?

Accepted Answer

A)   to compensate for its low rate of catalysis
B)   because it has a high rate of catalysis
C)   because it has eight large subunits
D)   because it has eight small subunits
E)   because it is not a regulatory siteF) A) and D)
G) B) and D)

Question 19

Why do the photosynthetic tissues of plants look green?

Accepted Answer

Photosynthetic tissue contains chlorophy...

Question 20

The synthesis of ATP coupled to the transfer of electrons energized by photons of light is called ____.

Accepted Answer

A)   photosynthesis
B)   photophosphorylation
C)   phosphorylative oxidation
D)   photorespiration
E)   oxidative phosphorylationF) A) and C)
G) A) and E)

Exam 8: Photosynthesis

Why do the photosynthetic tissues of plants look green?

Correct Answer
verified
Photosynthetic tissue contains chlorophy...
View Answer

Rubisco's enzymatic activity is stimulated by NADP⁺and ADP.

Correct Answer
verified

The C₄cycle ____.

Correct Answer
verified

I'm a botanist looking for new species of C₄plants. Where should I focus my search?

Correct Answer
verified

What is the fate of electrons from NADPH during the Calvin cycle?

Correct Answer
verified

The synthesis of ATP coupled to the transfer of electrons energized by photons of light is called ____.

Correct Answer
verified

Why is Rubisco present in high concentrations in leaves?

Correct Answer
verified

What is the source of electrons for carbon fixation in plants?

Correct Answer
verified

Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the other eight are small. What is the function of the small subunits?

Correct Answer
verified

Fluorescence occurs when ____.

Correct Answer
verified

Which statement correctly summarizes the two phases of photosynthesis?

Correct Answer
verified

Correct Answer
verified

In the C₄pathway, which molecule is formed after the addition of CO₂to PEP?

Correct Answer
verified

Why isn't the oxygenase function of rubisco active under normal environmental conditions?

Correct Answer
verified

Which event probably made the evolution of cellular respiration possible?

Correct Answer
verified

Answer the following questions using the accompanying figure. Identify each structure in the figure below. Some choices may be used more than once. Figure 8.1

Orchids, which grow well in regions that are hot and dry during the day and cool at night, are classified as CAM plants.

Correct Answer
verified

The beautiful fall leaves get their orange and yellow colors from carotenoids.

Correct Answer
verified

When does a C₄plant use rubisco?

Correct Answer
verified

Cyclic electron flow generates ATP and O₂, but not NADPH.

Correct Answer
verified

Exam 8: Photosynthesis

Why do the photosynthetic tissues of plants look green?

Correct AnswerverifiedPhotosynthetic tissue contains chlorophy...View AnswerShow Answer

Rubisco's enzymatic activity is stimulated by NADP+and ADP.

Correct AnswerverifiedShow Answer

The C4cycle ____.

Correct AnswerverifiedShow Answer

I'm a botanist looking for new species of C4plants. Where should I focus my search?

Correct AnswerverifiedShow Answer

What is the fate of electrons from NADPH during the Calvin cycle?

Correct AnswerverifiedShow Answer

The synthesis of ATP coupled to the transfer of electrons energized by photons of light is called ____.

Correct AnswerverifiedShow Answer

Why is Rubisco present in high concentrations in leaves?

Correct AnswerverifiedShow Answer

What is the source of electrons for carbon fixation in plants?

Correct AnswerverifiedShow Answer

Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the other eight are small. What is the function of the small subunits?

Correct AnswerverifiedShow Answer

Fluorescence occurs when ____.

Correct AnswerverifiedShow Answer

Which statement correctly summarizes the two phases of photosynthesis?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the C4pathway, which molecule is formed after the addition of CO2to PEP?

Correct AnswerverifiedShow Answer

Why isn't the oxygenase function of rubisco active under normal environmental conditions?

Correct AnswerverifiedShow Answer

Which event probably made the evolution of cellular respiration possible?

Correct AnswerverifiedShow Answer

Answer the following questions using the accompanying figure. Identify each structure in the figure below. Some choices may be used more than once. Figure 8.1

Orchids, which grow well in regions that are hot and dry during the day and cool at night, are classified as CAM plants.

Correct AnswerverifiedShow Answer

The beautiful fall leaves get their orange and yellow colors from carotenoids.

Correct AnswerverifiedShow Answer

When does a C4plant use rubisco?

Correct AnswerverifiedShow Answer

Cyclic electron flow generates ATP and O2, but not NADPH.

Correct AnswerverifiedShow Answer

Correct Answer
verified
Photosynthetic tissue contains chlorophy...
View Answer

Rubisco's enzymatic activity is stimulated by NADP⁺and ADP.

Correct Answer
verified

The C₄cycle ____.

Correct Answer
verified

I'm a botanist looking for new species of C₄plants. Where should I focus my search?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the C₄pathway, which molecule is formed after the addition of CO₂to PEP?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

When does a C₄plant use rubisco?

Correct Answer
verified

Cyclic electron flow generates ATP and O₂, but not NADPH.

Correct Answer
verified