AP Bio Photosynthesis Flashcard Review

Front

What are the light reactions of photosynthesis?

Back

The light reactions are the first stage of photosynthesis, occurring in the thylakoid membranes, where light energy is converted into chemical energy in the form of ATP and NADPH, and oxygen is released as a byproduct.

Front

What is the role of chlorophyll a in photosynthesis?

Back

Chlorophyll a is the primary pigment in photosynthesis that absorbs light energy and funnels it to the reaction center, initiating the process of converting light energy into chemical energy.

Front

What is produced during the light-dependent reactions of photosynthesis?

Back

ATP, NADPH, and oxygen are the products of the light-dependent reactions.

Front

What happens if the proton (H+) pump in the thylakoid is not functioning?

Back

If the proton pump is not working, ATP cannot be produced during the light reactions, as the proton gradient necessary for ATP synthesis would not be established.

Front

How many molecules of sugar are produced from six molecules of carbon dioxide in the Calvin cycle?

Back

One sugar molecule is produced from every six molecules of carbon dioxide that enter the Calvin cycle.

Front

What pigment is best suited for growing conditions with a green hue?

Back

Carotenoids are the pigments that are best suited for growing conditions where light has a green hue, as they can absorb light in other wavelengths.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose, using carbon dioxide and water.

Front

What is the Calvin cycle?

Back

The Calvin cycle is the set of chemical reactions that take place in chloroplasts during photosynthesis, where carbon dioxide is fixed into organic molecules to produce glucose.

Front

What is the significance of NADPH in photosynthesis?

Back

NADPH is a crucial electron carrier produced during the light reactions, providing the reducing power needed for the Calvin cycle to synthesize glucose.

Front

Explain the role of water in photosynthesis.

Back

Water is split during the light reactions to provide electrons, protons, and oxygen; it is essential for the production of ATP and NADPH.