B-LS1-5 Photosynthesis: Energy Transformation Flashcard

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

Front

Where do the light-dependent reactions occur?

Back

The light-dependent reactions occur in the thylakoid membranes of the chloroplasts.

Front

What is the primary purpose of the light-dependent reactions?

Back

The primary purpose of the light-dependent reactions is to convert light energy into chemical energy in the form of ATP and NADPH.

Front

What is chlorophyll?

Back

Chlorophyll is a green pigment found in plants that absorbs light energy, primarily in the blue and red wavelengths, and is essential for photosynthesis.

Front

What is the role of water in photosynthesis?

Back

Water provides electrons and protons during the light-dependent reactions and is split to release oxygen as a byproduct.

Front

What is ATP and why is it important in photosynthesis?

Back

ATP (adenosine triphosphate) is an energy carrier molecule that stores and transports chemical energy within cells, crucial for the light-independent reactions.

Front

What is NADPH and its role in photosynthesis?

Back

NADPH (nicotinamide adenine dinucleotide phosphate) is a reducing agent that provides the high-energy electrons needed for the Calvin cycle to synthesize glucose.

Front

What is the Calvin cycle?

Back

The Calvin cycle is the light-independent stage of photosynthesis where carbon dioxide is fixed into glucose using ATP and NADPH.

Front

What is the significance of oxygen in photosynthesis?

Back

Oxygen is a byproduct of photosynthesis, released during the light-dependent reactions when water is split.