Photosynthesis

One of the principal chemical compounds that living things use to store energy is...

Energy is released from ATP when

a phosphate group is added to the ATP molecule.

ATP is exposed to water

ATP is exposed to sunlight.

A phosphate group is removed from the ATP molecule

In which organelles would most of the light-absorbing pigments be found?

Mitochondria

Chloroplasts

Ribosomes

Nucleus

Plants gather the sun's energy with light-absorbing molecules called

Pigments

Thylakoids

chloroplasts

Glucose

Where are photosystems I and II found?

In the stroma

In the thylakoid membrane

In the Calvin cycle

All of the above

Which step is the beginning of photosynthesis?

Pigments in photosystem I absorb light.

Pigments in photosystem II absorb light.

High-energy electrons move through the electron transport chain.

Carbon dioxide bonds with a 5-carbon sugar in the Calvin cycle.

The first process in the light-dependent reactions of photosynthesis is

Light absorption

electron transport through the electron transport chain

Oxygen production

ATP formation

Which substances from the light-dependent reactions of photosynthesis are a source of energy used to power the Calvin cycle?

ATP and NADPH

ATP and water

NADPH and water

ATP and glucose

During photolysis, water molecules are split into hydrogen ions, electrons, and

Carbon dioxide

Oxygen

Poisonous gas

ATP

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