Photosynthesis In Higher Plants — DPP 1

20 NEET questions from Photosynthesis In Higher Plants, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

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1
During the process of photosynthesis the raw materials used are:
  1. A Glucose
  2. B Chlorophyll
  3. C Starch
  4. D $\mathrm{CO}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$
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Correct answer: D

2
Main difference between chlorophyll $a$ and chlorophyll $b$ is;

  1. A $-\mathrm{CH}_{3}$ of chlorophyll $a$ is replaced by -CHO in chlorophyll $b$
  2. B Chlorophyll $a$ is branched while chlorophyll $b$ is linear
  3. C Chlorophyll $a$ has no Mg while chlorophyll $b$ has Mg
  4. D All of these.
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Correct answer: A

3
Assertion (A): Leaf colouration is due to the presence of four pigments - chlorophyll a, chlorophyll b, xanthophylls and carotenoids.
Reason (R): Chlorophyll b is the chief pigment associated with photosynthesis.
  1. A Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
  2. B Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A)
  3. C Assertion (A) is true, but Reason (R) is false
  4. D Assertion (A) is false, but Reason (R) is true
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Correct answer: C

4
The process making the significant difference between $\mathrm{C}_{3}$ and $\mathrm{C}_{4}$ plants is;
  1. A respiration
  2. B calvin cycle
  3. C photorespiration
  4. D glycolysis
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Correct answer: C

5
Energy required for ATP synthesis in the ETS comes from:
  1. A proton gradient
  2. B reduction of glucose
  3. C electron gradient
  4. D oxidation of glucose
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Correct answer: A

6
Assertion (A): The non-cyclic photophosphorylation represents Z scheme of light reaction.
Reason (R): In Z-scheme, the characteristic shape is formed by the movement of electrons from PS I to PS II.
  1. A Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
  2. B Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A)
  3. C Assertion (A) is true, but Reason (R) is false
  4. D Assertion (A) is false, but Reason (R) is true
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Correct answer: C

7
For the synthesis of one glucose molecule, the Calvin cycle operates;
  1. A 8 times
  2. B 4 times
  3. C 6 times
  4. D 2 times
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Correct answer: C

8
The first acceptor of $\mathrm{CO}_{2}$ in $\mathrm{C}_{4}$ plants is;
  1. A aspartic acid
  2. B malic acid
  3. C oxaloacetic acid
  4. D phosphoenolpyruvate
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Correct answer: D

9
Which of the given lights are strongly absorbed by plants?
  1. A Indigo and Yellow
  2. B Yellow and Violet
  3. C Blue and Red
  4. D Orange and Violet
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Correct answer: C

10
Which of these is product in respiration and substrate in photosynthesis?
  1. A $\mathrm{O}_{2}$
  2. B $\mathrm{CO}_{2}$
  3. C CO
  4. D $\mathrm{N}_{2}$
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Correct answer: B

11
What is the light-harvesting complex (LHC) made up of ?
  1. A one molecule of chl a.
  2. B very few molecules of chl a.
  3. C hundreds of pigment molecules bound to proteins.
  4. D Chl a + Chl c + protein + DNA.
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Correct answer: C

12
When $\mathrm{CO}_{2}$ is added to PEP, the first stable product synthesised is:
  1. A pyruvate
  2. B glyceraldehyde-3-phosphate
  3. C phosphoglycerate
  4. D oxaloacetate.
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Correct answer: D

13
$\mathrm{C}_{4}$ plants are able to minimise photorespiration because $\mathrm{C}_{4}$ plants;
  1. A do not carry out the Calvin cycle
  2. B use PEP carboxylase to initiate $\mathrm{CO}_{2}$ fixation.
  3. C exclude Calvin cycle.
  4. D do not show respiration.
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Correct answer: B

14
What effect would occur in photosynthesis, if the amount of oxygen in the atmosphere relative to carbon dioxide decreases?
  1. A Increase in $\mathrm{C}_{3}$ cycle and decrease in $\mathrm{C}_{4}$ cycle
  2. B Increase in $\mathrm{C}_{4}$ cycle and decrease in $\mathrm{C}_{3}$ cycle
  3. C Increase in $\mathrm{C}_{3}$ cycle and no change in $\mathrm{C}_{4}$ cycle
  4. D Increase in $\mathrm{C}_{4}$ cycle and no change in $\mathrm{C}_{3}$ cycle
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Correct answer: C

15
The following hypothesis, 'Plants restore to the air whatever breathing animals and burning candles remove' was given by:
  1. A Jan Ingenhousz
  2. B T.W. Engelmann
  3. C Joseph Priestley
  4. D C. van Niel
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Correct answer: C

16
In half-leaf experiment, a compound is used to absorb $\mathrm{CO}_{2}$. This compound is;
  1. A NaOH
  2. B KOH
  3. C NaCl
  4. D HCl.
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Correct answer: B

17
During light reaction in photosynthesis, the following are formed:
  1. A ATP and sugar
  2. B Hydrogen, $\mathrm{O}_{2}$ and sugar
  3. C ATP, hydrogen donor and $\mathrm{O}_{2}$
  4. D ATP, hydrogen and $\mathrm{O}_{2}$ donor
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Correct answer: C

18
What occurs during the light reaction of photosynthesis?
  1. A Chlorophyll is produced
  2. B Water splits to form $\mathrm{H}^{+} \& \mathrm{O}_{2}$ and $\mathrm{e}^{-}$
  3. C $\mathrm{CO}_{2}$ is given off as a waste
  4. D Sugar is formed from $\mathrm{CO}_{2}$ and water
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Correct answer: B

19
In the half-leaf experiment of photosynthesis, KOH solution is used because;
  1. A it provides $\mathrm{O}_{2}$ to the leaf.
  2. B it provides moisture to the leaf.
  3. C it helps in $\mathrm{CO}_{2}$ fixation.
  4. D it absorbs $\mathrm{CO}_{2}$.
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Correct answer: D

20
Assertion (A): Splitting of water molecules is associated with PS II.
Reason (R): This results in the release of $\mathrm{O}_{2}$, protons and transfer of electrons to PS I.
  1. A Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
  2. B Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A)
  3. C Assertion (A) is true, but Reason (R) is false
  4. D Assertion (A) is false, but Reason (R) is true
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Correct answer: C

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