Question 1

Starch stored as granules in the chloroplasts serves what purpose?

Accepted Answer

A)  It causes plant cells to swell.
B)  It provides plants with sugars at night when light-dependent reactions are not possible.
C)  It provides plants with cellulose during the day.
D)  It supplies plants with ribulose bisphosphate.
E)  It causes plant cells to shrink.F) A) and E)
G) None of the above

Question 2

Organisms that use the energy stored in inorganic molecules, like ammonia, hydrogen sulfide, or nitrites, to convert carbon dioxide to organic molecules like carbohydrates and proteins are called ___________.

Accepted Answer

A)  chemoautotrophs
B)  chemoheterotrophs
C)  photoautotrophs
D)  photoheterotrophs
E)  didliotrophsF) None of the above
G) C) and E)

Question 3

Which molecule conveys protons from the chloroplast stroma into the thylakoid lumen?

Accepted Answer

A)  cytochrome b6f
B)  plastocyanin
C)  phytochrome
D)  cytochrome c
E)  oxygenF) A) and E)
G) A) and B)

Question 4

The PSII reaction center, also known as P680, _____________.

Accepted Answer

A)  absorbs light most strongly at 680 nm
B)  reflects light most strongly at 680 nm
C)  reflects light most strongly at 700 nm
D)  absorbs light most strongly at 700 nmE) C) and D)
F) B) and C)

Question 5

Photoautotrophs include _________.

Accepted Answer

A)  plants
B)  eukaryotic algae
C)  various flagellated protists
D)  members of several groups of prokaryotes
E)  all of these are correctF) A) and D)
G) B) and E)

Question 6

2-phosphoglycolate is converted into glycolate by an enzyme in the ________.

Accepted Answer

A)  peroxisome
B)  glyoxysome
C)  stroma
D)  thylakoid disk
E)  thylakoid membraneF) B) and C)
G) B) and E)

Question 7

The rate of photosynthetic CO2 fixation _____ and the rate of the release of CO2 by photorespiration _______ when _____ a plant is placed in a closed container.

Accepted Answer

A)  decreases, increases, C3
B)  increases, decreases, C3
C)  decreases, increases, C4
D)  decreases, decreases, C3
E)  increases, increases, C3F) A) and E)
G) C) and D)

Question 8

Which three organelles in a leaf cell are found closely associated with each other and cooperate with each other in such a way that products of one organelle serve as substrates in another?

Accepted Answer

A)  peroxisomes, lysosomes, mitochondria
B)  chloroplasts, mitochondria, lysosomes
C)  chloroplasts, nuclei, mitochondria
D)  mitochondria, chloroplasts, peroxisomes
E)  chloroplasts, nuclei, peroxisomesF) C) and E)
G) A) and D)

Question 9

How do the products of carbon fixation in a C4 plant move from the mesophyll to the bundle sheath cells?

Accepted Answer

A)  in lysosomes
B)  through plasmodesmata
C)  diffusion across the plasma membrane
D)  by ciliar movement
E)  in mitochondriaF) A) and E)
G) B) and D)

Question 10

What is the mechanism by which the herbicides diuron, atrazine and terbutryn are able to kill plants?

Accepted Answer

A)  They bind to the manganese ions of chlorophyll.
B)  They block electron transport through PSII.
C)  They act as competitive inhibitors of reduced plastiquinone binding to chlorophyll a.
D)  They act as noncompetitive inhibitors of reduced plastiquinone binding to the D1 protein of PSII.
E)  They bind to hemoglobin.F) A) and E)
G) B) and D)

Question 11

A mechanism that regulates basic cell processes, like protein folding, transcription, translation, and chloroplast metabolism, by controlling the activity of proteins is called ________.

Accepted Answer

A)  transubstantiation
B)  internal combustion
C)  redox control
D)  oxidation inhibition
E)  reduction counter-regulationF) A) and C)
G) C) and E)

Question 12

How does the production of ATP in chloroplasts differ from production in mitochondria?

Accepted Answer

A)  The protons move into the stroma of chloroplasts and out of the stroma of mitochondria.
B)  It relies on electrochemical potential in mitochondria and on pH gradient in chloroplasts.
C)  It relies on pH gradient in mitochondria and electrochemical potential in chloroplasts.
D)  The protons move into the intermembrane space in chloroplasts and into the thylakoid lumen in mitochondria.
E)  The protons move into the matrix in mitochondria and into the cytoplasm in chloroplasts.F) None of the above
G) A) and B)

Question 13

As energy passes through a photosynthetic unit, it is transferred to a pigment molecule that absorbs at an______ wavelength, so energy is _____ and the nature of future transfers becomes restricted.

Accepted Answer

A)  equal or longer, lost
B)  equal or longer, gained
C)  equal or shorter, gained
D)  equal or shorter, lost
E)  equal, the sameF) A) and B)
G) A) and C)

Question 14

Formation of chromoplasts from chloroplasts is an adaptation designed to assist in:

Accepted Answer

A)  pollination
B)  seed dispersal
C)  protection from herbivorous animals
D)  protection from herbicides
E)  energy storageF) C) and E)
G) A) and C)

Question 15

What waste product of photolysis is released to the environment?

Accepted Answer

A)  carbon dioxide
B)  water
C)  oxygen
D)  ammonia
E)  precipitated manganeseF) A) and D)
G) A) and C)

Question 16

You expose algae to CO2 that contains radiolabeled oxygen. Where does the radiolabeled oxygen end up after photosynthesis?

Accepted Answer

A)  in water
B)  in oxygen
C)  in carbon dioxide
D)  in carbohydrates
E)  in carbon monoxideF) A) and E)
G) A) and B)

Question 17

Why might Rubisco have evolved with an inability to distinguish between CO2 and O2?

Accepted Answer

A)  low atmospheric O2 levels when Rubisco evolved
B)  low atmospheric CO2 levels when Rubisco evolved
C)  high atmospheric O2 levels when Rubisco evolved
D)  multiple subunits in the Rubisco enzyme competing for substrate
E)  selective advantages for plants that are able to bind both CO2 and O2F) C) and D)
G) A) and E)

Question 18

Which type of chlorophyll is only found in red algae?

Accepted Answer

A)  chlorophyll a
B)  chlorophyll b
C)  chlorophyll c
D)  chlorophyll d
E)  carotenoidsF) A) and B)
G) D) and E)

Question 19

The outer membrane of the chloroplast contains _____ like the outer membrane of ______.

Accepted Answer

A)  carbohydrates, mitochondria
B)  carbohydrates, peroxisomes
C)  several different porins, mitochondria
D)  mitochondria, porins
E)  several different porins, the nucleusF) A) and E)
G) D) and E)

Question 20

What is the minimum number of photons needed to make one molecule of O2 during photosynthesis?

Accepted Answer

A)  2
B)  4
C)  6
D)  8
E)  16F) A) and C)
G) C) and D)

Exam 6: Photosynthesis and the Chloroplast

Formation of chromoplasts from chloroplasts is an adaptation designed to assist in:

Correct AnswerverifiedShow Answer

You expose algae to CO2 that contains radiolabeled oxygen. Where does the radiolabeled oxygen end up after photosynthesis?

Correct AnswerverifiedShow Answer

What waste product of photolysis is released to the environment?

Correct AnswerverifiedShow Answer

How does the production of ATP in chloroplasts differ from production in mitochondria?

Correct AnswerverifiedShow Answer

The PSII reaction center, also known as P680, _____________.

Correct AnswerverifiedShow Answer

The rate of photosynthetic CO2 fixation _____ and the rate of the release of CO2 by photorespiration _______ when _____ a plant is placed in a closed container.

Correct AnswerverifiedShow Answer

Starch stored as granules in the chloroplasts serves what purpose?

Correct AnswerverifiedShow Answer

Which three organelles in a leaf cell are found closely associated with each other and cooperate with each other in such a way that products of one organelle serve as substrates in another?

Correct AnswerverifiedShow Answer

How do the products of carbon fixation in a C4 plant move from the mesophyll to the bundle sheath cells?

Correct AnswerverifiedShow Answer

Which type of chlorophyll is only found in red algae?

Correct AnswerverifiedShow Answer

Which molecule conveys protons from the chloroplast stroma into the thylakoid lumen?

Correct AnswerverifiedShow Answer

Why might Rubisco have evolved with an inability to distinguish between CO2 and O2?

Correct AnswerverifiedShow Answer

As energy passes through a photosynthetic unit, it is transferred to a pigment molecule that absorbs at an______ wavelength, so energy is _____ and the nature of future transfers becomes restricted.

Correct AnswerverifiedShow Answer

2-phosphoglycolate is converted into glycolate by an enzyme in the ________.

Correct AnswerverifiedShow Answer

The outer membrane of the chloroplast contains _____ like the outer membrane of ______.

Correct AnswerverifiedShow Answer

Photoautotrophs include _________.

Correct AnswerverifiedShow Answer

A mechanism that regulates basic cell processes, like protein folding, transcription, translation, and chloroplast metabolism, by controlling the activity of proteins is called ________.

Correct AnswerverifiedShow Answer

What is the mechanism by which the herbicides diuron, atrazine and terbutryn are able to kill plants?

Correct AnswerverifiedShow Answer

Organisms that use the energy stored in inorganic molecules, like ammonia, hydrogen sulfide, or nitrites, to convert carbon dioxide to organic molecules like carbohydrates and proteins are called ___________.

Correct AnswerverifiedShow Answer

What is the minimum number of photons needed to make one molecule of O2 during photosynthesis?

Correct AnswerverifiedShow Answer

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You expose algae to CO₂ that contains radiolabeled oxygen. Where does the radiolabeled oxygen end up after photosynthesis?

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The rate of photosynthetic CO₂ fixation _ and the rate of the release of CO₂ by photorespiration _ when ___ a plant is placed in a closed container.

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How do the products of carbon fixation in a C₄ plant move from the mesophyll to the bundle sheath cells?

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Why might Rubisco have evolved with an inability to distinguish between CO₂ and O₂?

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As energy passes through a photosynthetic unit, it is transferred to a pigment molecule that absorbs at an__ wavelength, so energy is _ and the nature of future transfers becomes restricted.

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The outer membrane of the chloroplast contains _ like the outer membrane of __.

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What is the minimum number of photons needed to make one molecule of O₂during photosynthesis?

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