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Photosynthesis in Higher Plants Class 11 MCQs Questions with Answers
Question 1.
During the process of photosynthesis the raw materials used are:–
(a) Glucose
(b) Chlorophyll
(c) Starch
(d) CO2 and H2O
Answer
Answer: (d) CO2 and H2O
Question 2.
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
Answer
Answer: (c) Liberation of O2, formation of ATP, and NADPH2 takes place
Question 3.
It is only the green part of the plant, which takes part in
(a) Respiration
(b) Transpiration
(c) Photosynthesis
(d) Osmosis
Answer
Answer: (c) Photosynthesis
Question 4.
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.
Answer
Answer: (d) It absorbs CO2.
Question 5.
Photosynthesis is most active in
(a) Sun light
(b) Yellow light
(c) Red light
(d) Green light
Answer
Answer: (c) Red light
Question 6.
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.
Answer
Answer: (a) Chl a has a methyl group and Chl b has an aldehyde group.
Question 7.
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
Answer
Answer: (c) 3ATP and 2NADPH2
Question 8.
During ATP synthesis electron pass through
(a) Water
(b) Cytochromes
(c) O2
(d) CO2
Answer
Answer: (b) Cytochromes
Question 9.
The concentration of CO2 in the atmosphere is approximately
(a) 0.003%
(b) 0.03%
(c) 0.30 %
(d) 3.00 %
Answer
Answer: (b) 0.03%
Question 10.
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
Answer
Answer: (a) It is a colored cell
Question 11.
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
Answer
Answer: (a) CO2 is taken in
Question 12.
Respiration and photosynthesis both require
(a) Green cells
(b) Sunlights
(c) Cytochromes
(d) Organic fuel
Answer
Answer: (c) Cytochromes
Question 13.
Photosynthesis is an oxidation reduction process, the materials that is oxidised is
(a) CO2
(b) NADP
(c) H2O
(d) PGA
Answer
Answer: (c) H2O
Question 14.
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
Answer
Answer: (b) Light reaction to the dark reaction
Question 15.
The process of taking in CO2 by plants and releasing O2 is termed as
(a) Transpiration
(b) Respiration
(c) Photosynthesis
(d) Endosmosis
Answer
Answer: (c) Photosynthesis
Question 16.
ADP + iP = ATP in grana is called:–
(a) Phosphorylation
(b) Oxidative phosphorylation
(c) Photophosphorylation
(d) Photolysis
Answer
Answer: (c) Photophosphorylation
Question 17.
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.
Answer
Answer: (b) Increase in green house effect
Question 18.
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
Answer
Answer: (a) methyl group
Question 19.
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
Answer
Answer: (b) Formation of ATP
Question 20.
The specific characteristic of C4-plants is:
(a) bulliform cells
(b) isobilateral leaf
(c) kranz anatomy
(d) parallel veins configuration
Answer
Answer: (c) kranz anatomy
Question 21.
Chlorophyll in chloroplasts is located in
(a) Grana
(b) Pyrenoid
(c) Stroma
(d) Both grana and stroma
Answer
Answer: (a) Grana
Question 22.
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
Answer
Answer: (c) They become bouyant due to accumulation of O2 as a result of photosynthesis
Question 23.
In which of the following process, the light energy is converted into chemical energy
(a) Digestive action
(b) Respiration
(c) Photosynthesis
(d) Fermentation
Answer
Answer: (c) Photosynthesis
Question 24.
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
Answer
Answer: (d) Ability to multiply by a fission-like process
Question 25.
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
Answer
Answer: (a) Two distinct photosystems
Question 26.
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
Answer
Answer: (a) 400-700
Question 27.
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
Answer
Answer: (b) 400-700 nm
Question 28.
Which one of the following is represented by Calvin cycle?
(a) Reductive carboxylation
(b) Oxidative carboxylation
(c) Photophosphorylation
(d) Oxidative phosphorylation
Answer
Answer: (a) Reductive carboxylation
Question 29.
Which enzyme is most abundantly found on earth?
(a) Catalase
(b) Rubisco
(c) Nitrogenase
(d) Invertase
Answer
Answer: (b) Rubisco
Question 30.
How many turns of Calvin cycle yield one molecule of glucose?
(a) Eight
(b) Two
(c) Six
(d) Four
Answer
Answer: (c) Six
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