Student Corner

1. In photosynthesis dark reaction, is called so because-

A. It occurs in dark.

B. It does not require light energy.

C. It cannot occur during daytime.

D. It occurs more rapidly at night.

Ans: B

2. Rate of photosynthesis does not depend upon:

A. Quality of light

B. Intensity of Light

C. Duration of Light

D. Temperature

Ans: C

3. For photosynthesis green plants require:

A. Chlorophyll only

B. Light

C. Carbon dioxide and water

D. All of the above

Ans: D

4. Photosynthesis is a _____ process.

A. Catabolic

B. Anabolic

C. Exothermic

D. Metabolic

Ans: B

5. Name the pigment which is responsible for absorption of light in plants?

A. Chlorophyll

B. Stoma

C. Xylem

D. Phloem

Ans: A

6. In bacteria name the colour of light which is responsible for photosynthesis?

A. Ultra-Violet

B. Blue

C. Red

D. None of the above

Ans: C

7. Quantasomes are found in:

A. Cristae of mitochondria

B. Thylakoid membrane of chloroplasts

C. Nucleus membrane

D. Lysosome

Ans: B

8. Name the metal present in chlorophyll ‘a’ and ‘b’?

A. Iron

B. Copper

C. Magnesium

D. Manganese

Ans: C

9. Name the structural unit of photosynthesis?

A. Thylakoid

B. Grana

C. Stroma

D. Chlorophyll

Ans: A

10. Which of the following statements are true regarding Photosystems?

A. Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids.

B. Many Prokaryotes have only one photosystem.

C. Both A and B are correct.

D. Only A is correct.

Ans: C

Therefore, Photosynthesis is an Oxidation-Reduction reaction which takes place in two steps; light reaction and dark reaction. With the help of Question and Answers we have tried to cover the whole process and also we come to know how light energy is converted into chemical energy.
It can be explained via equation also:
6Co2 + 12 H2O -----> C6H12O6 + 6O2 + 6H2O