AP Bio Insta-Review Topic 3.5*: Photosynthesis

Front

What is 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, using carbon dioxide and water.

Front

What are the two main stages of photosynthesis?

Back

The two main stages of photosynthesis are the Light Reactions and the Calvin Cycle.

Front

Where do the Light Reactions of photosynthesis occur?

Back

The Light Reactions occur in the thylakoid membranes of the chloroplasts.

Front

What is the primary pigment involved in photosynthesis?

Back

The primary pigment involved in photosynthesis is chlorophyll.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll absorbs light energy, primarily from the sun, which is used to drive the reactions of photosynthesis.

Front

What is G3P and why is it important?

Back

G3P (glyceraldehyde-3-phosphate) is a three-carbon sugar produced in the Calvin Cycle; it is a building block for glucose and other carbohydrates.

Front

What is the function of the Calvin Cycle?

Back

The Calvin Cycle synthesizes glucose from carbon dioxide using ATP and NADPH produced in the Light Reactions.

Front

Where does the Calvin Cycle take place?

Back

The Calvin Cycle takes place in the stroma of the chloroplasts.

Front

What is the role of water in photosynthesis?

Back

Water provides electrons and protons for the Light Reactions and is split to release oxygen as a byproduct.

Front

What happens to hydrogen ions during the Light Reactions?

Back

Hydrogen ions are pumped into the thylakoid space, creating a proton gradient used to produce ATP.