NY Regents Photosynthesis

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 reactions and dark reactions (Calvin cycle).

Front

What is PGAL and its role in photosynthesis?

Back

PGAL (Phosphoglyceraldehyde) is a three-carbon sugar produced during the Calvin cycle, which is used to synthesize glucose.

Front

What gas is essential for the dark reactions of photosynthesis?

Back

Carbon dioxide.

Front

What are the products of the dark reactions of photosynthesis?

Back

Simple sugars (like glucose) and water.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll absorbs light energy, which is necessary for the light reactions.

Front

How do light reactions differ from dark reactions in photosynthesis?

Back

Light reactions convert solar energy into chemical energy (ATP and NADPH), while dark reactions use that energy to fix carbon dioxide into sugars.

Front

What is the significance of water in photosynthesis?

Back

Water provides electrons and protons for the light reactions and is a byproduct of the dark reactions.

Front

What analogy can be used to explain the phases of photosynthesis?

Back

Light reactions are like gathering materials for a cake, while dark reactions are like the baking phase.

Front

What is the overall equation for photosynthesis?

Back

6CO2 + 6H2O + light energy → C6H12O6 + 6O2.