Factors affecting Photosynthesis

Q.

What are the external factors affecting photosynthesis?

Q.

Name the products of photolysis of water.

Q. The process of keeping a plant in the dark for a day or two is known as ___.

Q.

What was Cornelius Van Niels study about photosynthesis based on?

Q. Importance of day length in flowering of plants was first shown in:

1. Cotton
2. Petunia
3. Lemna
4. Tobacco

Q. Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is

1. Calcium oxide
   
   
2. Distilled water
   
3. Potassium hydroxide solution
   
4. Sodium carbonate.
   

Q. Assertion: Plants utilize 5-10% of the absorbed water in photosynthesis.
Reason: Reduced leaf hydration decreases the photosynthesis.

1. Both reason and assertion are true and the reason is the correct explanation for the assertion.
2. Assertion is true but the reason is false
3. Both the assertion and reason are false
4. Both the reason and assertion are true but the reason is not the correct explanation of the assertion.

Q.

___ CO2 + ___ H20 —-> C6H12O6 + ___ O2 + ___ H2O + energy

Q. Which of the following does not act as a limiting factor for photosynthesis

1. Oxygen
2. Carbon dioxide
3. Chlorophyll
4. Light

Q. Which of the following adversely affects photosynthesis?

1. U.V light
2. Blue light
3. Red light
4. Green light

Q.

In photosynthesis, the most useful colors of the light spectrum are

1. green, yellow, & orange

2. red, violet&blue

3. infrared, red, & yellow

4. red, white& blue