Question

What two products of the light reactions are used up in the Calvin cycle?

Answer 1

Answer:

Figure: Light Reactions: Light-dependent reactions harness energy from the sun to produce chemical bonds, ATP, and NADPH. These energy-carrying molecules are made in the stroma where the Calvin cycle takes place.

Answer 2

ATP and NADPH are the two products of the light reactions that are used up in the Calvin cycle.

Explanation:

• In plants, through stomata $CO_2$ enters the leaves and mixes with the stroma of the chloroplast.

• Stroma is the part where the Calvin cycle takes place.

• Carbon atoms from $CO_2$ are fixed and they are used to build three-carbon sugar during this Calvin cycle.

• 'Sugar' is formed in the Calvin cycle reactions.

• Calvin cycle reaction is a light-dependent reaction because it uses ATP and NADPH from the light reactions.

• 'Stroma' is the part where this Calvin cycle takes place.