Chemistry for Biologists

Photosynthesis

1. The two principal stages of photosynthesis are:
photosystem I and photosystem II
cyclic and non-cyclic phosphorylation
the light-dependent and light-independent reactions
photolysis and ATP synthesis
2. In photosynthesis, carbohydrates are produced during:
the light-independent stage
the light-dependent stage
non-cyclic phosphorylation
cyclic phosphorylation
3. In photosynthesis, oxygen is produced during:
cyclic phosphorylation
the light reactions
the light-dependent stage
non-cyclic phosphorylation
4. In photosynthesis, carbon dioxide is fixed during:
the light-dependent stage
the light-independent stage
non-cyclic phosphorylation
cyclic phosphorylation
5. In photosynthesis, excited electrons leave a chlorophyll molecule during:
the light-dependent stage
the light-independent stage
cyclic phosphorylation
non-cyclic phosphorylation
6. In the light-independent stage carbohydrate is synthesized from:
NAPD
PGA
ADP
ATP
7. Phosphoglyceric acid (PGA) is formed when carbon dioxide is fixed onto the 5C compound:
edenosine triphosphate
ribulose bisphosphate
adenosine monophosphate
nicotinamide adenine dinucleotide phosphate
8. The first stable product of the Calvin Cycle is:
NAPD
ADP
PGA
ATP
9. The greenhouse effect is likely to:
reduce the rate at which carbon is incorporated into carbohydrate globally
have no effect on the rate of photosynthesis globally
decrease the rate of photosynthesis globally
increase the rate of photosynthesis globally
10. If light intensity increases in an atmosphere of excess carbon dioxide, the limiting factor on the rate of photosynthesis is most likely to be:
temperature
carbon dioxide concentration
light intensity
chlorophyll type

 

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