BCHM 307 Quiz 5- All Questions100% Solved with Verified Solutions
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Course
BCHM 307
Institution
BCHM 307
If carbon dioxide is used as a substrate, the major products of rubisco are
_________; if oxygen is used as a substrate, the major products are ______. -
Answer 2 molecules of 3-phosphoglycerate; 2-phosphoglycolate and 3-
phosphoglycerate
Complete the following reaction: P680 + light → ______...
BCHM 307 Quiz 5- All Questions100% Solved
with Verified Solutions
If carbon dioxide is used as a substrate, the major products of rubisco are
_________; if oxygen is used as a substrate, the major products are ______. -
Answer 2 molecules of 3-phosphoglycerate; 2-phosphoglycolate and 3-
phosphoglycerate
Complete the following reaction: P680 + light → ______ → ________. - Answer
P680*; P680+ + e-
What were the first organisms that had the ability to oxidize water? - Answer
cyanobacteria
During the oxidation of water, where do the protons go? - Answer thylakoid
lumen
Why does rubisco make up about half of the protein content in a typical
chloroplast? - Answer it is a very inefficient enzyme, catalyzing only three
reactions per second
Regeneration of the rubisco substrate, ribulose-1, 5-bisphosphate involves which
of the following sugars? - Answer a pentose-phosphate, a hexose-phosphate, a
heptose-phosphate, a tetrose-phosphate
Cytochrome b6f is most similar to mitochondrial _______ with the exception that
electrons are passed to _______, not to cytochrome c. - Answer complex III;
plastocyanin
, Which of the following describes photorespiration? - Answer consumes ATP,
consume O2, consumes CO2, comsumes NADPH
In the rubisco mechanism, what performs the nucleophilic attack on carbon
dioxide? - Answer enediolate intermediate
Why is photosystem I unable to oxidize water? - Answer it is not a strong enough
oxidizing agent
The P680 of photosystem II is composed of ____________. - Answer two
chlorophylls
Which of the following can happen when a photosynthetic pigment pigment
absorbs light? - Answer energy lost as heat, photooxidation, energy given off by
fluorescence, exciton transfer
Which of the following best describes how a reaction center is excited? - Answer
any antenna of the light harvesting complex can transfer an electron to the
reaction center by exciton transfer
Which of the following occurs during the cyclic electron flow? - Answer not
photosystem I absorbs light but not photosystem II
Chlorophylls and carotenoids absorb most light between _________ nm and
________ nm, while reflecting most light between _______ nm. - Answer 400-
500; 600-700; 500-600
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