Limiting factors MCQ (Multiple Choice Questions) PDF Download

Primary factors controlling the rate of photosynthesis are known as

1. inhibiting factors
2. limiting factors
3. expediting factors
4. supporting factors

Under natural conditions, the atmospheric carbon dioxide (CO₂) remains stable at

1. 0.0003
2. 0.0006
3. 0.0013
4. 0.0016

Increase in temperature from 20 to 30 °C, causes

1. boost in rate of photosynthesis
2. drop in the rate of photosynthesis
3. stability in the rate of photosynthesis
4. limiting factor on photosynthesis

Photolysis of 12 water molecules result in

1. 6 atoms of hydrogen
2. 12 atoms of hydrogen
3. 18 atoms of hydrogen
4. 24 atoms of hydrogen

The higher the light wavelength, the

1. more the energy of a photon
2. lesser the energy of a photon
3. lesser the energy of the protons
4. lesser the energy of positron