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BCHM 307 Photosynthesis- All Questions100% Solved with Verified Solutions
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BCHM 307 Photosynthesis- AllQuestions100% Solved with Verified
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Electrons are transferred from P680 to ________, then to cytochrome - Answer
plastoquinone
Light dependent ATP production is called _______ and occurs in the ________ of
chloroplasts. - Answer photophosphorylation; thylakoid membrane
What is an assembly of antenna pigments? - Answer light-harvesting complex
The production of one molecule of glucose requires ________. - Answer 6 CO2, 18 ATP,
12 NADPH
The active group of photosystem I is known as ________. - Answer P700
Which of the following occurs during the cyclic electron flow?
1) protons are pumped into the lumen by cytochrome b6f
2) electrons are transferred from photosystem I → ferrodoxin → cytochrome b6f
→ plastocyanin, then back to NADPH or oxygen
3) photosystem I absorbs light but not photosystem II
4) there is no production of NADPH or oxygen - Answer 4) there is no production of
NADPH or oxygen
, 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
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
Which of the following describes photorespiration?
1) consumes NADPH
2) consumes ATP
3) consumes oxygen
4) consumes CO2
5) all of these answers are correct - Answer 5) all of these answers are correct
Regeneration of the rubisco substrate, ribulose-1, 5-bisphosphate involves which of the
following sugars?
1) a pentose-phosphate
2) a hexose-phosphate
3) a tetrose-phosphate
4) a heptose-phosphate
5) all of these answers are correct - Answer 5) all of these answers are correct
During the oxidation of water, where do the protons go? - Answer thylakoid lumen
The products of the light reactions, ATP and NADPH, are used by _________ and
___________, respectively. - Answer phosphoglycerate kinase; glyceraldehyde-3-
phosphate dehydrogenase
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