BIOLOGY [5 Mark Question Answer]

Respiration

Photosynthesis

1. Occurs all the time even in the absence of light.

Occurs only in the presence of sunlight.

2. Does not require chlorophyll occurs in all cells.

Requires green pigment, chlorophyll.

3. Uses food material (glucose) and oxygen.

Uses carbon dioxide and water.

4. Carbon dioxide and water are released as end products.

Oxygen is released as the end product.

Combustion

Respiration

1. It is a fast process, occurs in non-living things.

It is a slow, stepwise process, occurs in living things.

2. It occurs at high temperature.

It occurs at normal room temperature.

3. Energy is produced in the form of heat and light.

Energy is released in steps, and stored in a special chemical molecule. No heat or light is produced.

4. Conversion to carbon dioxide and water occurs in one step. No enzyme is involved.

Many steps are involved in the conversion of carbohydrates to carbon dioxide and water.These steps or reactions are catalyzed by enzymes.