MCQ ON MECHANISM OF PHOTOSYNTHESIS class 11 for NEET

MCQ ON MECHANISM OF PHOTOSYNTHESIS class 11 for NEET | MECHANISM OF PHOTOSYNTHESIS class 11 | MCQ MECHANISM OF PHOTOSYNTHESIS with Answer | Check the below NCERT MCQ question for class 11Biology based on the with Answers.

MCQ on MECHANISM OF PHOTOSYNTHESIS class 11 Biology with answers were prepared based on the latest pattern.We have provided class 11 Biology MCQs question with Answers to help students understand the concept very well.

MCQ ON MECHANISM OF PHOTOSYNTHESIS is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23 , 2023-24

INTRODUCTION:-
The photo synthesis complete into steps light reaction and dark reaction. Light reaction is also called photochemical phase and occurs in thylakoids where is dark reaction is called thermochemical phase and occurs inside the the stroma of chloroplast.

Light reaction begins as soon as light fall on green plants. The pigment molecules present in PS1 and PS2 observe their specific wavelength of light and become energized. The accessory pigments observe light and transfer their observe energy finally to their reaction centre which take part in photochemical act.

The electrons move through to pathways non cyclic and cyclic. The noncyclic electron transport involves participation of both PS2 and PS1 and and cyclic electron transport involves only PS1.

Dark reaction or bio synthetic phase occurs in the stroma of chloroplast whereas the products of light reaction are is to incorporate carbon from carbon dioxide to carbohydrate .

Although the reaction itself does not require light but the process usually occurs in the light and continue for a very brief period after a plant is kept in dark as long as NADPH and ATP are available.

MCQ ON MECHANISM OF PHOTOSYNTHESIS class 11 for NEET

1. Photo synthesis is maximum in

(a) green light
(b) blue followed by red light
(c) red followed by blue light
(d) blue light

Ans (c) red followed by blue light

2. Kranz anatomy is one of the characteristics of the leaves of

(a) sugarcane
(b) wheat
(c) potato
(d) mustard

Ans. (a) sugarcane

3. splitting of water is associated with

(a) photo system I
(b) lumen of thylakoid
(c) both photosystem I and II
(d) inner surface of thylakoid membrane

Ans. (d) inner surface of thylakoid membrane

4. Dark reaction in photosynthesis is called so because

(a) It can occur in dark also
(b) It does not depend on light energy
(c) it cannot occur during daylight
(d) it occurs more rapidly at night

Ans.(a) It can occur in dark also

5.PEP is primary CO2 acceptor in

(a) C4 plants
(b) C3 plants
(c) C2 plants
(d) both C3 and C4 plants

Ans.(a) C4 plants

6. During light reaction in photosynthesis the following are formed

(a) ATP and sugar
(b) hydrogen , O2 and sugar
(c) ATP , hydrogen donor and O2
(d) ATP , hydrogen and O2 donor

Ans.(c) ATP , hydrogen donor and O2

7. Energy required for ATP synthesis in PS II comes from

(a) proton gradient
(b) electron gradient
(c) reduction to glucose
(d) oxidation of glucose

Ans.(a) proton gradient

8. Chemosynthetic bacteria obtain energy from

(a) sun
(b) infra red rays
(c) organic substances
(d) inorganic chemicals

Ans.(d) inorganic chemicals

9. Which light energy is most effective in photosynthesis ?

(a) blue
(b) green
(c) red
(d) violet

Ans. (c) red

10. Which pigment acts directly to convert light energy to chemical energy.

(a) chlorophyll a
(b) chlorophyll b
(c) xanthophyll
(d) carote

Ans. (a) Chlorophyll a

11.Which metal ion is a constituent of chlorophyll?

(a) Iron
(b) Copper
(c) Magnesium
(d) Zinc

Ans.(c) Magnesium

12. In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in

(a) Bundle sheath
(b) Guard cells
(c) Epidermal cells
(d) Mesophyll cells

Ans . (d) Mesophyll cells

13. In a chloroplast the highest number of protons are found in

(a) lumen of thylakoid
(b) inner membrane space
(c) antennae complex
(d) stroma

Ans.(a) lumen of thylakoid

14.The process which makes major difference between C3 and C4 plants is

(a) Glycolysis
(b) Calvin cycle
(c) Photorespiration
(d) Respiration

Ans. (c) Photorespiration

15. Which one of the following is essential for photolysis of water ?

(a) Manganese
(b) Zinc
(c) Copper
(d) Boron

Ans.(a) Manganese

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16. In photosynthesis , the light – independent reaction takes place at

(a) Stromal matrix
(b) Thylakoid lumen
(c) Photosystem -I
(d) Photosystem – II

Ans.(a) Stromal matrix