In lab, you will count bubbles released by an aquatic plant. We are making the a

Question

In lab, you will count bubbles released by an aquatic plant. We are making the assumption that these bubbles consist of oxygen released by photosynthesis. Where is this oxygen produced?

a. in the C3 cycle

b. in the C4 cycle

c. in the mitochondria

d. at the point where CO2
enters the C3 cycle

e. in the light reactions

The energy in the form of ATP and NADPH used to join six CO2 molecules together to form a six carbon sugar comes from light energy. Light energy is converted to chemical energy in:

a. in the C3 cycle

b. in the C4 cycle

c. in the mitochondria

d. at the point where CO2
enters the C3 cycle

e. in the light reactions

One of the products of photosynthesis is a six carbon sugar. This sugar is produced by the reactions of the:

a. C3 cycle

b. C4 cycle

c. mitochondria

d. chlorophyll

e. light reactions

As mentioned in concept 10.3, in a plant that only uses the C3 cycle, a C3
plant, efficiency of photosynthesis decreases when atmospheric levels of CO2
decrease. What happens to photosynthetic rates in C3 plants as levels of atmospheric CO2 increase?

a. not much, the photosynthetic rate does not increase much as external levels of CO2
increase

b. photosynthetic levels increase, the photosynthetic rate increases as external levels of CO2 increase

c. photosynthetic levels decrease, the photosynthetic rate decreases as external levels of CO2 increase

As mentioned in concept 10.3, in a plant that has the C4 cycle concentrates CO2
at the C3 cycle. Therefore, efficiency of photosynthesis in a C4 plant remains high when atmospheric levels of CO2
decrease. What happens to photosynthetic rates in C4 plants as levels of atmospheric CO2 increase?

a. not much, the photosynthetic rate does not increase much as external levels of CO2
increase

b. photosynthetic levels increase, the photosynthetic rate increases as external levels of CO2 increase

c. photosynthetic levels decrease, the photosynthetic rate decreases as external levels of CO2 increase

These questions are very tricky, for me at least. Can someone help?

Explanation / Answer

1.      In lab, you will count bubbles released by an aquatic plant. We are making the assumption that these bubbles consist of oxygen released by photosynthesis. Where is this oxygen produced?
a. in the C3 cycle
b. in the C4 cycle
c. in the mitochondria
d. at the point where CO2 enters the C3 cycle
e. in the light reactions

2.      The energy in the form of ATP and NADPH used to join six CO2 molecules together to form a six carbon sugar comes from light energy. Light energy is converted to chemical energy in:
a. in the C3 cycle
b. in the C4 cycle
c. in the mitochondria
d. at the point where CO2 enters the C3 cycle
e. in the light reactions

3.      One of the products of photosynthesis is a six carbon sugar. This sugar is produced by the reactions of the:
a. C3 cycle
b. C4 cycle
c. mitochondria
d. chlorophyll
e. light reactions

4.      As mentioned in concept 10.3, in a plant that only uses the C3 cycle, a C3
plant, efficiency of photosynthesis decreases when atmospheric levels of CO2
decrease. What happens to photosynthetic rates in C3 plants as levels of atmospheric CO2 increase?
a) not much, the photosynthetic rate does not increase much as external levels of CO2
increase
b) photosynthetic levels increase, the photosynthetic rate increases as external levels of CO2 increase
c) photosynthetic levels decrease, the photosynthetic rate decreases as external levels of CO2 increase

5.      As mentioned in concept 10.3, in a plant that has the C4 cycle concentrates CO2
at the C3 cycle. Therefore, efficiency of photosynthesis in a C4 plant remains high when atmospheric levels of CO2 decrease. What happens to photosynthetic rates in C4 plants as levels of atmospheric CO2 increase?
a. not much, the photosynthetic rate does not increase much as external levels of CO2 increase
b. photosynthetic levels increase, the photosynthetic rate increases as external levels of CO2 increase
c. photosynthetic levels decrease, the photosynthetic rate decreases as external levels of CO2 increase

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