CBSE Class 11 Biology Photosynthesis In Higher Plants Worksheet Set B

Photosynthesis In Higher Plants MCQ Questions with Answers Class 11 Biology

Question- Which one of the following is a C₄ plant?

(1) Papaya

(2) Potato

(3) Maize

(4) Pea

Answer (3)

Question-The essential role of air in the growth of green plants was revealed by

(1) Priestley

(2) Van Niel

(3) Blackmann

(4) Emerson

Answer (1)

Question- Which of the following statements is not true regarding the C₄ plants?

(1) They show kranz anatomy

(2) Decarboxylation process occurs in bundle sheath cells

(3) Granal chloroplast is present in bundle sheath cells.

(4) PEPcase enzyme activity occurs in mesophyll cells

Answer (3)

Question-Moll’s half leaf experiment was done to show _____ was required for photosynthesis.

(1) H₂O

(2) Chlorophyll

(3) Light

(4) CO₂

Answer (4)

Question-The assimilatory power produced during light reaction in green algae is

(1) ATP, NADPH + H⁺

(2) NAD+

(3) NADP

(4) ATP & NADH

Answer (1)

Question-Chemiosmotic hypothesis for generation of ATP during light reaction was first explained by

(1) Hill

(2) Arnold

(3) P. Mitchell

(4) Van Niel

Answer (3)

Question- NADPH is generated through

(1) Anaerobic respiration

(2) Cyclic photophosphorylation

(3) Non-cyclic photophosphorylation

(4) Glycolysis

Answer (3)
 

Question- The CO ₂ acceptor in C₃ plants is

(1) RuBP

(2) PGA

(3) PEP

(4) OAA

Answer (1)
 

Question-The protons formed by splitting of water are released in the

(1) Lumen of the thylakoids

(2) Outer side of the membrane

(3) Both (1) & (2)

(4) Stroma of chloroplast

Answer (1)
 

Question-Which among the following is not a step in Calvin cycle?

(1) Carboxylation

(2) Reduction

(3) Photophosphorylation

(4) Regeneration

Answer (3)
 

Question- A milestone contribution to the understanding of photosynthesis was made by Cornelius van Niel, which was based on the studies of

(1) Bacteria

(2) Alga

(3) Angiospermic plant

(4) Lower plant

Answer (1)


Question- Regeneration of four molecules of RuBP in C₃ cycle requires the expenditure of _____ ATP.

(1) 1

(2) 4

(3) 3

(4) 2

Answer (2)
 

Question-Grana present in chloroplast refers to

(1) Stroma lamellae

(2) Stacks of quantasomes

(3) Stacks of thylakoids

(4) Double membranous envelope

Answer (3)
 

Question-Photosystem is composed of

(1) Light harvesting complex

(2) Reaction centre

(3) Accessory pigments

(4) More than one is correct

Answer (4)


Question-The enzyme RuBP carboxylase

(1) Activity occurs in C₃ and C ₄ plants

(2) It present in inner thylakoid membrane

(3) Is low temperature sensitive enzyme

(4) Shows greater affinity for O₂ than for CO₂

Answer (1)
 

Question-In C₄ plants, first stable product of CO₂ fixation is

(1) OAA

(2) RuBP

(3) 3-PGA

(4) Malic Acid

Answer (1)

Question- The oxygen liberated during the photosynthesis comes from

(1) CO₂

(2) Water

(3) Photosynthetic enzymes

(4) Carbohydrates

Answer (2)
 

Question- Choose incorrect w.r.t. photosynthesis

(1) It is a physico-chemical process

(2) Oxygen is evolved as a by-product in all photosynthetic organisms

(3) Occurs in unicellular and multicellular photoautotrophs

(4) Anabolic and reductive process

Answer (2)
 

Question- In C₄ plants, sugar is produced in

(1) Bundle sheath cells

(2) Mesophyll cells

(3) Palisade leaf cells

(4) Spongy mesophyll

Answer (1)
 

Question- The C₄ and C₃ plants differ from each other in

(1) Type of pigments involved in photosynthesis

(2) The primary acceptor of CO₂ during carbon fixation

(3) Type of end products of photosynthesis

(4) Number of NADPH that are consumed during the starch synthesis process

Answer (2)
 

Question- The photosystem connected with splitting of water is

(1) PS II

(2) PS I

(3) Carotenoid (4) P ₇₀₀

Answer (1)
 

Question- The enzyme responsible for carboxylation reaction (CO2fixation) in C₃ plants is

(1) RuBP oxygenase

(2) Pyruvate decarboxylase

(3) RuBP carboxylase

(4) PEP carboxylase

Answer (3)
 

Question- In the chloroplast, the stroma lamellae lack the

(1) PS I, NADP reductase

(2) PS II, PS I

(3) NADP reductase enzyme, P 700

(4) NADP reductase, PS II

Answer (4)


Question- The CO₂ fixation during the Hatch and Slack pathway occurs in

(1) Large thick walled cells

(2) Mesophyll cells

(3) Vascular bundles

(4) Bundle sheath cell cytoplasm

Answer (2)
 

Question- Curve showing the effectiveness of different wavelength of light in photosynthesis was first given by Engelmann using all, except

(1) Filamentous green alga Cladophora

(2) Unicellular green alga Chlorella

(3) Suspension of aerobic bacteria

(4) Prism to split the light in its components

Answer (2)
 

Question-  In C₃ plants, first stable product of CO₂ fixation is

(1) 3-PGA

(2) Starch

(3) OAA

(4) Pyruvate

Answer (1)
 

Question- The movement of electrons as per Z-scheme in light reaction is

(1) From low to high energy level

(2) Uphill in redox potential scale

(3) Downhill in redox potential scale

(4) Both (2) & (3)

Answer (4)
 

More Question 

Q1. Define photosynthesis.

Q2. Describe briefly experiments performed by Joseph Preisthy,Ingehbouis, sachs, Engleman & Van Niel for photosynthesis.

Q3. Describe the sectional view of chloroplasts & give the site of light & dark reaction of photosynthesis.

Q4. What are the pigments involved in photosynthesis. Name them & give functions of accessory pigments.

Q5. What are the differences between:- (i) Chl a & Chl b (ii) Action & absorption spectrum.

Q6, Describe the basic characteristics of photosystems & explain how photosystem I define from photosystem II.

Q7. What is the role of antennae molecules in light harvesting complex?

Q8. What are 2 steps (main) of photosynthesis? Give the diagrammatic scheme of light reaction (zscheme).

Q9. What is the need of photolysis of water & give the ions which play an important role in it.

Q10. Define photophosphorylation

Q11 (a) Give schematic representation of non-cyclic & cyclic photophosphorylation.
(b) Give difference between them also.

Q12 (a) What does chemiosmotu hypothesis explain ?
(b) Explain chemissmosis hypothesis with help of schematic diagram.

Q13. Describe the biosynthetic phase of photosynthesis. How is it linked to light reaction?

Q14. When & why does photorespiration take place in plants? How does this process result in a loss to the plants?

Q15. Why do plants like maize & sugarcane have dimorphic chloroplasts? Explain photosynthetic carbon cycle in such plants.

Q16. Give differences between C₃ & C₄ plants.

Q17. By looking at which internal structure of a plant can you tell whether a plant is C₃ or C₄?

Q18. What is law of limiting factors? How would rate of photosynthesis be affected if soil water becomes limiting. Explain.

Q19. Why does the rate of photosynthesis decrease at higher light intensities? What plays a protective role in such conditions?

Q20. What is the effect of increasing CO₂ concentration on rate of photosynthe