Light Dependent Reactions of Photosynthesis

Front

What supplies the electron that is lost in PS II?

Back

Water is the source of the electron lost in Photosystem II (PS II) during the light-dependent reactions of photosynthesis.

Front

What is the main purpose of the light dependent reactions?

Back

The main purpose of the light-dependent reactions is to provide the energy for the Calvin cycle.

Front

What are the two products of the light reactions that are needed for the Calvin cycle?

Back

The two products needed for the Calvin cycle are NADPH and ATP.

Front

What is the primary function of cyclic electron flow?

Back

The primary function of cyclic electron flow is to produce additional ATP.

Front

What provides the energy required to pump H+ ions into the H ion reservoir?

Back

The energy required to pump H+ ions comes from the Electron Transport Chain.

Front

Define light-dependent reactions.

Back

Light-dependent reactions are the first stage of photosynthesis where light energy is converted into chemical energy in the form of ATP and NADPH.

Front

What role does chlorophyll play in photosynthesis?

Back

Chlorophyll is a pigment that absorbs light energy, primarily in the blue and red wavelengths, which is essential for the light-dependent reactions.

Front

Explain the significance of ATP in photosynthesis.

Back

ATP serves as the energy currency in cells, providing the energy needed for various biochemical processes, including the Calvin cycle.

Front

What is the function of NADPH in photosynthesis?

Back

NADPH acts as a reducing agent, providing the electrons needed for the conversion of carbon dioxide into glucose during the Calvin cycle.

Front

Describe the process of photolysis in photosynthesis.

Back

Photolysis is the process of splitting water molecules using light energy, which releases oxygen and provides electrons for photosynthesis.