Exam (elaborations)
BIOC 385 Final Exam Questions & Detailed Answers
- Course
- BIOC 385
- Institution
- North Dakota State University
BIOC 385 Final Exam Questions & Detailed Answers
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BIOC 385 Final Exam Questions & DetailedAnswers
The Biosphere 2 project, in Tucson, Arizona, was an 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?
Levels of CO2 rose to dangerous levels.
The humans ran out of food.
The plants stopped producing oxygen.
The rate of photosynthesis was too high - ANS Levels of CO2 rose to dangerous
levels
The __________ is driven directly by photo- ns from the sun in photosynthesis
light reactions.
pumping of protons
synthesis of ATP
transfer of electrons
synthesis of glucose - ANS transfer of electrons
Heme and chlorophyll have similar overall structures. What is common between
the two molecules?
,color
hydrophobic tail
polycyclic planar structure
metal ion found at their center - ANS polycyclic planar structure
Chlorophyll absorbs light energy efficiently because of the
metal ion in the center of the molecule.
ring structure.
planar structure.
alternating double and single bonds. - ANS alternating double and single bonds
Which of the following is a photosynthetic light harvesting pigment?
FeS cluster
NADPH
plastoquinone
β-carotene - ANS β-carotene
Approximately how many light-harvesting chromophores are found per
photosystem enzyme, such as in PSI or PSII?
,2
about a dozen
about 100 to 200
about 1000 to 2000 - ANS about 100 to 200
The following picture is an example of what phenomenon?
resonance energy transfer
electron transfer
photoexcitation
fluorescence - ANS resonance energy transfer
Which of the following is an electron transfer molecule in photosynthesis light
reactions?
plastoquinone
photon
paraquat
ATP - ANS plastoquinone
The photosynthetic Z scheme describes the
, synthesis of glucose from CO2.
movement of electrons driven by the absorption of light energy.
production of O2.
reduction of NADPH. - ANS movement of electrons driven by the absorption of
light energy
The primary difference between ATP synthesis during the photosynthetic light
reactions and ATP synthesis in the mitochondrial electron transport chain is the
cellular location of the proton motive force.
enzyme catalyzing the ATP synthesis.
number of ATP produced per 360 rotation of the F1 subunit of ATP synthase.
number of NADPH required to produce ATP. - ANS cellular location of the proton
motive force
In the chloroplasts, photosystem I (PSI) and photosystem II (PSII) are known to
localize in different regions. PSI generally localizes in the __________, whereas PSII
localizes in the __________.
thylakoid lumen, thylakoid grana
thylakoid lamellae, thylakoid grana
stroma, thylakoid lumen
thylakoid grana, thylakoid lamellae - ANS thylakoid lamellae, thylakoid grana
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