Photosynthesis Basic Concepts 2

Question 1

Which organelle is the primary site of photosynthesis in plant cells?

Accepted Answer

Chloroplast

Answer

Chloroplasts contain the pigments and enzymes needed to convert light energy into chemical energy.

Question 2

What color of light is LEAST effective for driving photosynthesis?

Accepted Answer

Green

Answer

Green light is mostly reflected by chlorophyll, which is why plants appear green.

Question 3

Which of the following is a product of the light-dependent reactions?

Accepted Answer

NADPH

Answer

The light-dependent reactions produce ATP, NADPH, and oxygen as their primary outputs.

Question 4

The Calvin cycle takes place in which part of the chloroplast?

Accepted Answer

Stroma

Answer

The Calvin cycle occurs in the stroma, the fluid-filled space surrounding the thylakoids.

Question 5

How many carbon atoms does a molecule of carbon dioxide (CO₂) contribute to the Calvin cycle?

Accepted Answer

1

Answer

Each CO₂ molecule contributes one carbon atom, which is incorporated into organic molecules during carbon fixation.

Photosynthesis Practice Test