AP Biology Unit 3: Cellular Energetics Review

Front

What phase of photosynthesis produces organic sugars?

Back

The Calvin cycle.

Front

What do enzymes do to activation energy to speed up chemical reactions?

Back

Enzymes decrease activation energy.

Front

What is the relationship between an enzyme's active site and its substrate?

Back

The active site has a specific shape that fits the shape of the substrate.

Front

What products of the light reaction are directly needed by the Calvin cycle in photosynthesis?

Back

ATP and NADPH.

Front

What are the products of the light reaction of photosynthesis?

Back

Oxygen, NADPH, ATP.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll absorbs light energy, primarily in the blue and red wavelengths, and converts it into chemical energy.

Front

What is the difference between the light reactions and the Calvin cycle?

Back

Light reactions convert solar energy into chemical energy (ATP and NADPH), while the Calvin cycle uses that chemical energy to synthesize glucose from carbon dioxide.

Front

What is ATP and why is it important in cellular energetics?

Back

ATP (adenosine triphosphate) is the primary energy carrier in cells, providing energy for various cellular processes.

Front

What is NADPH and its role in photosynthesis?

Back

NADPH is a reducing agent that provides the electrons needed for the reduction of carbon dioxide in the Calvin cycle.