Question

which of following events happen during the calvin cycle?
a. atp is generated.
b. oxygen is released
c. nadp is reduced to nadph.
d. co₂ is fixed in an organic molecule.

question 8
during co₂ fixation, co₂ combines with
a. g3p.
b. 1,5 - ribulose bisphosphate (rubp).
c. water.
d. 3pg.

question 9
how are the two stages of photosynthesis connected to each other?
a. the nadph generated by the light reactions is used during the calvin cycle to generate atp.
b. the atp and nadph generated in the light reactions provide the energy necessary to make sugar during the calvin cycle.
c. the oxygen generated in the light reactions is used to make sugar in the calvin cycle.
d. the atp and nadph generated in the calvin cycle provide energy for the light reactions to occur.

question 10
which of the following statements about carbon dioxide (co₂) is incorrect?
a. co₂ is a pollutant that is harmful to humans.
b. co₂ is a critical component for the maintenance of all life on earth.
c. an increase in the atmospheric levels of co₂ will be beneficial for plant growth.
d. co₂ is greenhouse gas, but it is not the main cause of the greenhouse effect that maintains earths temperature at a level that allows for life to flourish.

Explanation:

• Question 7: In the Calvin - cycle, carbon dioxide is fixed into an organic molecule. ATP is generated in the light - reactions, oxygen is released in the light - reactions, and NADP is reduced to NADPH in the light - reactions.
• Question 8: During CO₂ fixation in the Calvin cycle, CO₂ combines with 1,5 - ribulose bisphosphate (RuBP).
• Question 9: The ATP and NADPH generated in the light - reactions provide the energy necessary to make sugar during the Calvin cycle.
• Question 10: CO₂ is a critical component for photosynthesis and plant growth, and is a greenhouse gas important for maintaining Earth's temperature. While high levels can be a concern in some contexts, it is not simply a pollutant harmful to humans in all cases.

Answer:

• Question 7: D. CO₂ is fixed in an organic molecule.
• Question 8: B. 1,5 - ribulose bisphosphate (RuBP).
• Question 9: B. The ATP and NADPH generated in the light reactions provide the energy necessary to make sugar during the Calvin cycle.
• Question 10: CO₂ is a pollutant that is harmful to humans.