An Introduction To Photosynthesis

These flashcards cover key concepts, stages, and products of photosynthesis as discussed in the lecture notes.

What are the two main stages of photosynthesis?

Light Reactions and Calvin Cycle Reactions.

Where do the light reactions of photosynthesis occur?

In the thylakoid membranes of chloroplasts.

What does photosynthesis produce that is essential for aerobic species' cellular respiration?

Oxygen (O2).

What is the primary product of the Calvin Cycle?

Glyceraldehyde 3-Phosphate (PGAL/G3P).

What are the reactants required for photosynthesis?

Carbon dioxide (CO2), water (H2O), and light energy.

What is the function of chlorophyll in photosynthesis?

Chlorophyll absorbs photons from sunlight, which energizes the process of photosynthesis.

What does PAR stand for in the context of photosynthesis?

Photosynthetically Active Radiation.

What are some of the products derived from photosynthesis?

Fruits, vegetables, wood, clothing, biofuels, and pharmaceuticals.

Why is the Calvin Cycle considered the 'building block' of life?

It produces PGAL, which is used to create various biological molecules.

How do aerobic organisms, including humans, depend on photosynthesis?

They rely on the oxygen produced during photosynthesis for cellular respiration.

What role do pigments like carotenoids play in photosynthesis?

They absorb specific wavelengths of light, enhancing the range of light energy plants can capture.

What does ATP synthase do during the light reactions?

It catalyzes the conversion of ADP and inorganic phosphate into ATP using energy from a proton gradient.

What is the significance of the ozone layer in relation to photosynthesis?

It prevents lethal DNA mutations by intercepting UV radiation, enabling life in terrestrial habitats.

How do plants utilize the products of photosynthesis for their own growth?

Plants convert carbohydrates produced during photosynthesis into various biological molecules necessary for their growth and development.

Which part of the plant primarily performs photosynthesis?

The leaves.

What are some other plant organs that can perform photosynthesis?

Fruits, petals, sepals, roots, and stems.