Solved MCQs of Biology Class 9 Chapter 7

The purpose of respiration is to ……………. energy.

Absorb

Release

Both

None

In which of the following steps of respiration, CO2 is produced?

Glycolysis

Krebs cycle

Electron trransport

All of these

By-Product of Photosynthesis is:

Glucose

Carbon dioxide

Oxygen

None of these

The water from the soil enters into the root hairs by the process of

Photosynthesis

Osmosis

Diffusion

Respiration

The concentration of carbon dioxide in the environment is:

0.3%

0.03%

3%

3.01%

…………… is abbreviated from Adenosine Tri Phosphate.

ATP

ADP

AMP

All

The reactions which do not require light during photosynthesis are called __________ reactions.

Chemical

Redox

Dark

Light

……………… does not require sunlight.

Photosynthesis

Respiration

Both

None

When a plant was kept in darkness for many days, its leaves turnes yellow. Why?

Leaves could not yet oxygen and so there was no photosynthesis

Leaves could not get light and so there was no respiration

Leaves could not get oxygen and so there was no respiration

Leaves could not get light and so there was no photosynthesis

Green plants capture ………… energy.

Light energy

Solar energy

Tidal energy

Chemical energy