MCQ Questions for Class 11 Biology: Ch 13 Photosynthesis in Higher Plants

MCQ Questions for Class 11 Biology: Ch 13 Photosynthesis in Higher Plants

1. The process of taking in CO₂ by plants and releasing O₂ is termed as
(a) Transpiration
(b) Respiration
(c) Photosynthesis
(d) Endosmosis
► (c) Photosynthesis

2. How many turns of Calvin cycle yield one molecule of glucose?

(a) Eight

(b) Two

(c) Six

(d) Four

► (c) Six

3. The function of ATP in photosynthesis is the transfer of energy from the

(a) Dark reaction to the light reaction

(b) Light reaction to the dark reaction

(c) Chloroplasts to mitochondria

(d) Mitochondria to chloroplasts

► (b) Light reaction to the dark reaction

4. Which enzyme is most abundantly found on earth?

(a) Catalase

(b) Rubisco

(c) Nitrogenase

(d) Invertase

► (b) Rubisco

5. Photosynthesis is an oxidation reduction process, the materials that is oxidised is

(a) CO₂

(b) NADP

(c) H₂O

(d) PGA

► (c) H₂O

6. Which one of the following is represented by Calvin cycle?

(a) Reductive carboxylation

(b) Oxidative carboxylation

(c) Photophosphorylation

(d) Oxidative phosphorylation

► (a) Reductive carboxylation

7. Respiration and photosynthesis both require

(a) Green cells

(b) Sunlights

(c) Cytochromes

(d) Organic fuel

► (c) Cytochromes

8. Photosynthetically active radiation (PAR) represents which of the following range of wavelength?

(a) 340-450 nm

(b) 400-700 nm

(c) 450-950 nm

(d) 500-600 nm

► (b) 400-700 nm

9. In plants during the process of photosynthesis

(a) CO₂ is taken in

(b) O₂ is taken in

(c) CO₂ is taken out

(d) O₂ is taken in and CO₂ is given out

► (a) CO₂ is taken in

10. Which range of wavelength (in nm) is called photosynthetically active radiation (PAR)?
(a) 400-700
(b) 760-10,000
(c) 100-390
(d) 390-430
► (a) 400-700

11. Which one of the following statements about cytochrome P-450 is wrong?

(a) It is a colored cell

(b) It is an enzyme involved in oxidation reaction

(c) It has an important role in metabolism  

(d) It contains iron

► (a) It is a colored cell

12. Discovery of Emerson effect has already shown the existence of :–

(a) Two distinct photosystems

(b) Light and dark reactions of photosynthesis

(c) Photophosphorylation

(d) Photorespiration

► (a) Two distinct photosystems

13. The concentration of CO₂ in the atmosphere is approximately

(a) 0.003%

(b) 0.03%

(c) 0.30 %

(d) 3.00 %
► (b) 0.03%

14. What is common between chloroplasts, chromoplasts and leucoplasts?

(a) Storage of starch, proteins and lipids

(b) Possession of thylakoids and grana

(c) Presence of pigments

(d) Ability to multiply by a fission-like process

► (d) Ability to multiply by a fission-like process

15. During ATP synthesis electron pass through

(a) Water

(b) Cytochromes

(c) O₂

(d) CO₂

► (b) Cytochromes

16. In which of the following process, the light energy is converted into chemical energy

(a) Digestive action

(b) Respiration

(c) Photosynthesis

(d) Fermentation

► (c) Photosynthesis

17. Fixation of one CO₂ molecule through Calvin cycle requires:

(a) 1 ATP and 2NADPH₂

(b) 2ATP and 2NADPH₂

(c) 3ATP and 2NADPH₂

(d) 2ATP and 1NADPH₂

► (c) 3ATP and 2NADPH₂

18. Algae and other submerged plants bount in water during day time and sink at night, because
(a) They come upto enjoy some time
(b) They lose weight at night
(c) They become bouyant due to accumulation of O2 as a result of photosynthesis
(d) They become light due to food material accumulation
► (c) They become bouyant due to accumulation of O2 as a result of photosynthesis

19. Structurally, chlorophyll a and b are different as

(a) Chl a has a methyl group and Chl b has an aldehyde group.

(b) Chl a has an aldehyde group and Chl b has a methyl group.

(c) Chl a has an ethyl group and Chl b has an aldehyde group.

(d) Chl a has a carboxyl group and Chl b has an aldehyde group.

► (a) Chl a has a methyl group and Chl b has an aldehyde group.

20. Chlorophyll in chloroplasts is located in

(a) Grana

(b) Pyrenoid

(c) Stroma

(d) Both grana and stroma

► (a) Grana

21. Photosynthesis is most active in

(a) Sun light

(b) Yellow light

(c) Red light

(d) Green light

► (c) Red light

22. The specific characteristic of C_4-plants is:

(a) bulliform cells

(b) isobilateral leaf

(c) kranz anatomy

(d) parallel veins configuration
► (c) kranz anatomy

23. In the half-leaf experiment of photosynthesis, KOH solution is used because​
(a) It provides O₂ to the leaf.
(b) It provides moisture to the leaf.
(c) It helps in CO₂ fixation.
(d) It absorbs CO₂.
► (d) It absorbs CO₂.

24. Which one occurs both during cyclic and noncyclic modes of photophosphorylation?
(a) Involvement of both PS I and PS II
(b) Formation of ATP
(c) Release of O2
(d) Formation of NADPH
► (b) Formation of ATP

25. It is only the green part of the plant, which takes part in

(a) Respiration

(b) Transpiration

(c) Photosynthesis

(d) Osmosis

► (c) Photosynthesis

26. Chlorophyll ‘a’ molecule at its carbon atom 3 of the Pyrrole ring II has one of the following:

.(a) methyl group  

(b) aldehyde  group

(c) carboxyl group  

(d) magnesium

► (a) methyl group  

27. During photochemical reaction of photosynthesis –

(a) liberation of O₂ takes place

(b) Formation of ATP and NADPH₂ take place

(c) Liberation of O₂, formation of ATP, and NADPH₂ takes place

(d) Assimilation of CO₂ takes place

► (c) Liberation of O₂, formation of ATP, and NADPH₂ takes place

28. Which of the following is not a significance of photosynthesis ?

(a) Glucose synthesis for most of consumer

(b) Increase in green house effect

(c) Provides O₂ for synthesis of ozone umbrella

(d) Provides O₂ for cell respiration.

► (b) Increase in green house effect

29. During the process of photosynthesis the raw materials used are :–

(a) Glucose

(b) Chlorophyll

(c) Starch

(d) CO₂ and H₂O

► (d) CO₂ and H₂O

30. ADP  +  iP  =  ATP in grana is called :–

(a) Phosphorylation

(b) Oxidative phosphorylation

(c) Photophosphorylation

(d) Photolysis

► (c) Photophosphorylation