BIOC 385 Final Exam
Comprehensive Question Set & Verified
Answers | Biochemistry Final Exam Review |
2026–2027
,The Biosphere 2 project, in Tucson, Arizona, was an a) Levels of CO2 rose to dangerous levels.
experiment involving a large sealed terrarium with humans
and photosynthetic plants living in balance. Why did the
project have to be interrupted after only a few months?
a) Levels of CO2 rose to dangerous levels.
b) The humans ran out of food.
c) The plants stopped producing oxygen.
d) The rate of photosynthesis was too high.
The __________ is driven directly by photons from the sun c) transfer of electrons
in photosynthesis light reactions.
a) pumping of protons
b) synthesis of ATP
c) transfer of electrons
d) synthesis of glucose
Heme and chlorophyll have similar overall structures. What c) polycyclic planar structure
is common between the two molecules?
a) color
b) hydrophobic tail
c) polycyclic planar structure
d) metal ion found at their center
Chlorophyll absorbs light energy efficiently because of the d) alternating double and single bonds.
a) metal ion in the center of the molecule.
b) ring structure.
c )planar structure.
d) alternating double and single bonds.
Which of the following is a photosynthetic light harvesting d) β-carotene
pigment?
a) FeS cluster
b) NADPH
c) plastoquinone
d) β-carotene
Approximately how many light-harvesting chromophores c) about 100 to 200
are found per photosystem enzyme, such as in PSI or
PSII?
a) 2
b) about a dozen
c) about 100 to 200
d) about 1000 to 2000
The following picture is an example of what phenomenon? a) resonance energy transfer
a) resonance energy transfer
b) electron transfer
c) photoexcitation
d) fluorescence
Which of the following is an electron transfer molecule in a) plastoquinone
photosynthesis light reactions?
a) plastoquinone
b) photon
c) paraquat
d) ATP
The photosynthetic Z scheme describes the b) movement of electrons driven by the absorption of light energy.
a) synthesis of glucose from CO2.
b) movement of electrons driven by the absorption of light
energy.
c) production of O2.
d) reduction of NADPH.
, The primary difference between ATP synthesis during the a) cellular location of the proton motive force.
photosynthetic light reactions and ATP synthesis in the
mitochondrial electron transport chain is the
a) cellular location of the proton motive force.
b) enzyme catalyzing the ATP synthesis.
c) number of ATP produced per 360 rotation of the F1
subunit of ATP synthase.
d) number of NADPH required to produce ATP.
In the chloroplasts, photosystem I (PSI) and photosystem b) thylakoid lamellae; thylakoid grana
II (PSII) are known to localize in different regions. PSI
generally localizes in the __________, whereas PSII
localizes in the __________.
a) thylakoid lumen; thylakoid grana
b) thylakoid lamellae; thylakoid grana
c) stroma; thylakoid lumen
d) thylakoid grana; thylakoid lamellae
In what location of the cell does the Calvin cycle occur? c) chloroplast stroma
a) chloroplast grana
b) thylakoid lumen
c) chloroplast stroma
d) cytoplasm
The Calvin cycle requires which species from the light a) ATP and NADPH
reactions?
a) ATP and NADPH
b) reducing electrons
c) CO2 and ATP
d) NADH and FADH2
The first stage of the three-stage Calvin cycle d) is catalyzed by the enzyme rubisco.
a) generates CO2.
b) uses ATP and NADPH from the light reactions.
c) occurs in the plant cell cytoplasm.
d) is catalyzed by the enzyme rubisco.
The formation of one net glyceraldehyde-3-phosphate d) 6; 9
during the net Calvin cycle reactions requires __________
NADPH and __________ ATP.
a) 3; 3
b) 3; 6
c) 6; 6
d) 6; 9
What is the name of the enzyme that catalyzes the a) ribulose bisphosphate carboxylase
reaction shown below?
a) ribulose bisphosphate carboxylase
b) acetyl-CoA carboxylase
c) glyceraldehyde-3-phosphate dehydrogenase
d) pyruvate carboxylase
Transketolase requires the coenzyme d) thiamine pyrophosphate.
a) cobalamin (vitamin B12).
b) pyridoxal phosphate.
c) tetrahydrofolic acid.
d) thiamine pyrophosphate.
Which cell type in C4 plants is isolated from O2 exposure b) bundle sheath cells
as they perform Calvin cycle reactions?
a) Hatch-Slack cells
b) bundle sheath cells
c) guard cells
d) mesophyll cells
Comprehensive Question Set & Verified
Answers | Biochemistry Final Exam Review |
2026–2027
,The Biosphere 2 project, in Tucson, Arizona, was an a) Levels of CO2 rose to dangerous levels.
experiment involving a large sealed terrarium with humans
and photosynthetic plants living in balance. Why did the
project have to be interrupted after only a few months?
a) Levels of CO2 rose to dangerous levels.
b) The humans ran out of food.
c) The plants stopped producing oxygen.
d) The rate of photosynthesis was too high.
The __________ is driven directly by photons from the sun c) transfer of electrons
in photosynthesis light reactions.
a) pumping of protons
b) synthesis of ATP
c) transfer of electrons
d) synthesis of glucose
Heme and chlorophyll have similar overall structures. What c) polycyclic planar structure
is common between the two molecules?
a) color
b) hydrophobic tail
c) polycyclic planar structure
d) metal ion found at their center
Chlorophyll absorbs light energy efficiently because of the d) alternating double and single bonds.
a) metal ion in the center of the molecule.
b) ring structure.
c )planar structure.
d) alternating double and single bonds.
Which of the following is a photosynthetic light harvesting d) β-carotene
pigment?
a) FeS cluster
b) NADPH
c) plastoquinone
d) β-carotene
Approximately how many light-harvesting chromophores c) about 100 to 200
are found per photosystem enzyme, such as in PSI or
PSII?
a) 2
b) about a dozen
c) about 100 to 200
d) about 1000 to 2000
The following picture is an example of what phenomenon? a) resonance energy transfer
a) resonance energy transfer
b) electron transfer
c) photoexcitation
d) fluorescence
Which of the following is an electron transfer molecule in a) plastoquinone
photosynthesis light reactions?
a) plastoquinone
b) photon
c) paraquat
d) ATP
The photosynthetic Z scheme describes the b) movement of electrons driven by the absorption of light energy.
a) synthesis of glucose from CO2.
b) movement of electrons driven by the absorption of light
energy.
c) production of O2.
d) reduction of NADPH.
, The primary difference between ATP synthesis during the a) cellular location of the proton motive force.
photosynthetic light reactions and ATP synthesis in the
mitochondrial electron transport chain is the
a) cellular location of the proton motive force.
b) enzyme catalyzing the ATP synthesis.
c) number of ATP produced per 360 rotation of the F1
subunit of ATP synthase.
d) number of NADPH required to produce ATP.
In the chloroplasts, photosystem I (PSI) and photosystem b) thylakoid lamellae; thylakoid grana
II (PSII) are known to localize in different regions. PSI
generally localizes in the __________, whereas PSII
localizes in the __________.
a) thylakoid lumen; thylakoid grana
b) thylakoid lamellae; thylakoid grana
c) stroma; thylakoid lumen
d) thylakoid grana; thylakoid lamellae
In what location of the cell does the Calvin cycle occur? c) chloroplast stroma
a) chloroplast grana
b) thylakoid lumen
c) chloroplast stroma
d) cytoplasm
The Calvin cycle requires which species from the light a) ATP and NADPH
reactions?
a) ATP and NADPH
b) reducing electrons
c) CO2 and ATP
d) NADH and FADH2
The first stage of the three-stage Calvin cycle d) is catalyzed by the enzyme rubisco.
a) generates CO2.
b) uses ATP and NADPH from the light reactions.
c) occurs in the plant cell cytoplasm.
d) is catalyzed by the enzyme rubisco.
The formation of one net glyceraldehyde-3-phosphate d) 6; 9
during the net Calvin cycle reactions requires __________
NADPH and __________ ATP.
a) 3; 3
b) 3; 6
c) 6; 6
d) 6; 9
What is the name of the enzyme that catalyzes the a) ribulose bisphosphate carboxylase
reaction shown below?
a) ribulose bisphosphate carboxylase
b) acetyl-CoA carboxylase
c) glyceraldehyde-3-phosphate dehydrogenase
d) pyruvate carboxylase
Transketolase requires the coenzyme d) thiamine pyrophosphate.
a) cobalamin (vitamin B12).
b) pyridoxal phosphate.
c) tetrahydrofolic acid.
d) thiamine pyrophosphate.
Which cell type in C4 plants is isolated from O2 exposure b) bundle sheath cells
as they perform Calvin cycle reactions?
a) Hatch-Slack cells
b) bundle sheath cells
c) guard cells
d) mesophyll cells
