MCQ on Photosynthesis

Photosynthesis is the process by which plants, algae and some bacteria use sunlight, carbon dioxide and water to prepare their food. This is a biogeochemical process in which light energy is converted into chemical energy.

Photosynthesis takes place in the chloroplast. The chlorophyll present in the chloroplast traps the light from the sun and carries out the process.

Photosynthesis MCQs

1. Photosynthesis occurs in

  1. Chloroplast
  2. Golgi body
  3. Endoplasmic reticulum
  4. Nucleus

2. The optimum temperature for photosynthesis is

  1. 25-35℃
  2. 10-15℃
  3. 35-40℃
  4. 20-25℃

Also Read: Photosynthesis

3. Photorespiration occurs in

  1. Four cell organelles
  2. Two cell organelles
  3. One cell organelle
  4. Three cell organelle

4. Reduction of NADP occurs in

  1. Oxidative photophosphorylation
  2. Cyclic photophosphorylation
  3. Non cyclic photophosphorylation
  4. None

5. Kranz anatomy is found in the leaves of

  1. Wheat
  2. Mustard
  3. Potato
  4. Sugarcane

Also Read: Light Reaction

6. Peroxisomes are involved in which type of reactions

  1. Calvin cycle
  2. Glyoxylate cycle
  3. Glycolytic cycle
  4. Bacterial photosynthesis

7. Photorespiration involves oxidation of

  1. PGA
  2. RuBP
  3. Chlorophyll a
  4. Both a and b

8. C3 and C4 plants differ with respect to

  1. Number of ATP molecules consumed
  2. First product
  3. Substrate which accepts carbon dioxide
  4. All

Also Read: Photorespiration

9. In Calvin cycle, 1 molecule of glucose is formed from

  1. 6CO2 + 30ATP + 12NADPH
  2. 6CO2 + 12ATP
  3. 6CO2 + 18ATP + 12NADPH
  4. 6CO2 + 18ATP + 30NADPH

10. Where does light reaction take place?

  1. Grana
  2. Stroma
  3. Cytoplasm
  4. Endoplasmic reticulum

11. Electrons from the excited chlorophyll molecules of PS-II are first accepted by

  1. Pheophytin
  2. Ferredoxin
  3. Cytochrome f
  4. Cytochrome b

Also Read: Electron Transport Chain

12. Non cyclic photophosphorylation results in the production of

  1. NADH
  2. NADPH
  3. ATP
  4. ATP and NADPH

13. DCMU inhibits

  1. PS-I
  2. PS-II
  3. Oxidative phosphorylation
  4. It destroys chloroplast

Also Read: Glycolysis

14. Maximum photosynthesis occurs in

  1. Blue light
  2. Red light
  3. White light
  4. Green light

15. The first acceptor of CO2 in C4 plants is

  1. Aspartic acid
  2. Malic acid
  3. Oxaloacetic acid
  4. Phosphoenolpyruvate

16. The first product of C4 pathway is

  1. PGA
  2. DHAP
  3. Oxaloacetate
  4. Phosphoenolpyruvate

Also Read: TCA cycle

17. The two pigment system theory of photosynthesis was proposed by

  1. Aron
  2. Blackman
  3. Hill
  4. Emerson

18. H2 donor during photosynthesis is

  1. ATP
  2. NADP
  3. NADPH
  4. NADH

Also Read: Photosynthesis in Higher Plants

19. The minerals involved in spitting reaction during photosynthesis is

  1. Potassium and manganese
  2. Magnesium and chlorine
  3. Potassium and chlorine
  4. Manganese and chlorine

20. Water-soluble photosynthetic pigment is

  1. Chlorophyll a
  2. Xanthophyll
  3. Anthocyanin
  4. Chlorophyll b

Also Read: Calvin cycle

 

Answer Key

1- a

2- d

3- d

4- c

5- d

6- c

7- b

8- d

9- c

10- a

11- a

12- d

13- b

14- b

15- d

16- c

17- d

18- c

19- d

20- c

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