How Much Do You Know About Photosynthesis? Quiz

1. Which would you expect to increase the rate of photosynthesis?

Increasing the carbon dioxide concentration

Decreasing the intensity of exposure to light

Increasing the oxygen concentration

Decreasing the duration of exposure to light

2. In the Calvin cycle

Carbon dioxide is used to create organic molecules

Energy in the form of ATP is used

NADPH is required

Glucose is formed

All of these

3. In the light-dependent reactions

Carbon dioxide is fixed

ATP and NADPH form

Carbon dioxide accepts electrons

Glucose molecules form

4. Where do the light-dependent reactions take place?

In the stroma

Outside the chloroplasts

In the thylakoid membranes

Only in chlorophyll molecules

5. Energy is released from ATP when

A phosphate group is added.

Adenine bonds to ribose.

ATP is exposed to sunlight.

A phosphate group is removed.

6. If you see bubbles coming off of underwater plants, what are you seeing?

Oxygen bubbles from reactions in photosystem I

Oxygen bubbles from reactions in photosystem II

Carbon dioxide bubbles from reactions in photosystem I

Carbon dioxide bubbles from reactions in photosystem II

7. The specific energy source for the reaction ADP + phosphate ATP by the enzyme ATP synthetase in thylakoid membranes is

Movement of electrons between photosystem II and photosystem I

Splitting of a water molecule

Creation of a molecule of NADPH

Absorption of photons by chloroplast pigments

Higher concentration of H+ inside versus outside the thylakoid membranes

8. Why are electron transport systems important in photosynthesis?

They create NADP+ from NADPH for later use in syntheses

They provide the energy needed to split a molecule of carbon dioxide

They convert ATP into ADP which provides a store of energy

They convert ADP into ATP which provides a store of energy