Photosynthesis APB

Front

What is the metabolic result of photorespiration?

Back

It produces carbon dioxide and consumes ATP and oxygen.

Front

What is the role of the free energy released as electrons are passed from photosystem II to photosystem I?

Back

It is used to establish and maintain a proton gradient.

Front

Why do photosystems have several structurally different pigments in their reaction centers?

Back

This arrangement enables the plant to absorb light energy of a variety of wavelengths.

Front

How do C4 plants avoid photorespiration during photosynthesis?

Back

They use PEP carboxylase to initially fix CO2.

Front

What process produces the oxygen released by photosynthesis?

Back

Splitting water molecules.

Front

What is the primary function of photosynthesis?

Back

To convert light energy into chemical energy stored in glucose.

Front

What are the two main stages of photosynthesis?

Back

Light-dependent reactions and light-independent reactions (Calvin cycle).

Front

What is the significance of the proton gradient established during photosynthesis?

Back

It drives ATP synthesis through chemiosmosis.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll absorbs light energy, primarily in the blue and red wavelengths.

Front

What is the difference between C3 and C4 photosynthesis?

Back

C3 photosynthesis occurs in most plants and is less efficient in hot, dry conditions, while C4 photosynthesis is more efficient in these conditions due to a different CO2 fixation pathway.