How Much Do You Know About Photosynthesis? Quiz

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

In the light-dependent reactions

• Carbon dioxide is fixed

• ATP and NADPH form

• Carbon dioxide accepts electrons

• Glucose molecules form

Where do the light-dependent reactions take place?

• In the stroma

• Outside the chloroplasts

• In the thylakoid membranes

• Only in chlorophyll molecules

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.

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

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

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

Explain (specifically) why the dark reactions of photosynthesis are cyclic.

Explain why we would expect that living things on a planet other than ours should have also evolved some form of photosynthesis. In other words, why is photosynthesis a requirement for life?