CIE IGCSE Biology: Photosynthesis & Leaf Structure

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants manufacture carbohydrates from carbon dioxide and water using energy from light.

Front

What are the raw materials required for photosynthesis?

Back

The raw materials required for photosynthesis are carbon dioxide and water.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll is a green pigment that absorbs light energy, which is used to convert carbon dioxide and water into glucose.

Front

How do plants store carbohydrates produced during photosynthesis?

Back

Plants convert carbohydrates into starch for storage, cellulose for cell walls, and sucrose for transport.

Front

What minerals do plants need for growth?

Back

Plants need minerals such as nitrogen, magnesium, and other elements to synthesize proteins, chlorophyll, and other biological molecules.

Front

What is the word equation for photosynthesis?

Back

Carbon dioxide + water + → Glucose + oxgen with help of chorophyll and sunlight

Front

What happens to plants at night regarding gas exchange?

Back

At night, plants respire, taking in oxygen and releasing carbon dioxide, but do not photosynthesize.

Front

How can the effect of carbon dioxide on photosynthesis be tested?

Back

By placing a plant in a bell jar with sodium hydroxide (which absorbs CO2) and comparing it to a control plant.

Front

What is the role of the palisade mesophyll in photosynthesis?

Back

The palisade mesophyll contains many chloroplasts and is the primary site of photosynthesis in leaves.

Front

What is the purpose of the cuticle on a leaf?

Back

The cuticle is a waxy layer that reduces water loss and protects the leaf from environmental damage.