Photosynthesis Determinants of Photosynthetic Rate

Question 1

Which environmental factor most directly affects the rate of photosynthesis by influencing the availability of light energy?

Accepted Answer

Light intensity

Answer

Temperature

Answer

Carbon dioxide concentration

Answer

Water availability

Question 2

How does an increase in carbon dioxide concentration affect photosynthesis?

Accepted Answer

It increases the rate of photosynthesis.

Answer

It decreases the rate of photosynthesis.

Answer

It has no effect on photosynthesis.

Answer

It limits the rate of photosynthesis by reducing water availability.

Question 3

What is the effect of high temperatures on photosynthesis?

Accepted Answer

High temperatures decrease the rate of photosynthesis by damaging enzymes.

Answer

High temperatures increase the rate of photosynthesis significantly.

Answer

High temperatures have no effect on photosynthesis.

Answer

High temperatures cause an increase in oxygen production.

Question 4

How does water availability affect the rate of photosynthesis?

Accepted Answer

Insufficient water availability limits the rate of photosynthesis by reducing the amount of water available for splitting in the light-dependent reactions.

Answer

Water availability has no impact on photosynthesis.

Answer

Water is only important for the light-independent reactions of photosynthesis.

Answer

Water increases the rate of photosynthesis by boosting the chlorophyll content in leaves.

Question 5

How does the structure of a leaf affect photosynthesis?

Accepted Answer

The presence of a larger surface area and more chloroplasts increases the efficiency of photosynthesis.

Answer

A thicker leaf with more layers of cells increases photosynthesis.

Answer

A leaf with fewer stomata results in more photosynthesis.

Answer

The color of the leaf has no effect on photosynthesis.