The C 4 plants are more photosynthetically efficient than C 3 plants because:

The C 4 pathway allows photosynthesis to occur at very low concentration of CO 2 .

The CO 2 compensation point is more.

CO 2 generated during photorespiration is trapped and recycled through PEP carboxylase.

Study the cyclic pathway given below. Select the incorrect statement concerning the above pathway.

Both ATP and ribulose 1,5 bisphosphate regenerate during step 3.

The first step is the most crucial.

Carboxylation is catalysed by the RuBisCo enzyme, which results in the formation of the first stable product.

The second step involves utilisation of ATP and NADPH.

Choose the incorrect statement from the following:

C 4 acid OAA is formed in the bundle sheath cells

PEP carboxylase is found in the Mesophyll cells of C 4 plants

RUBP carboxylase is found in the bundle sheath cells of C 4 plants

Mesophyll cells lack RuBisCo enzyme

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 14

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Earn 100

Following table summarises the differences between light reactions and dark reactions.

Light reactions Dark reactions

(i) These are also called as biosynthetic phase These are also called as photochemical phase

(ii) These reactions occur over thylakoids These reactions occur in stroma of chloroplasts

(iii) These produce assimilatory power i.e., $N A D P H_{2}$ and $A T P$ These consume $N A D P H_{2}$ and $A T P$

(iv) These are directly dependent upon light These depend upon the products synthesized during light reactions

Which of the above pairs of differences is/are incorrect?

	Light reactions	Dark reactions
(i)	These are also called as biosynthetic phase	These are also called as photochemical phase
(ii)	These reactions occur over thylakoids	These reactions occur in stroma of chloroplasts
(iii)	These produce assimilatory power i.e., $N A D P H_{2}$ and $A T P$	These consume $N A D P H_{2}$ and $A T P$
(iv)	These are directly dependent upon light	These depend upon the products synthesized during light reactions

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Important Questions on Photosynthesis in Higher Plants

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 15

Match column I with II and select the correct option from the given codes.

	I		II
$(a)$	$C_{4}$ plants	$(i)$	Succulents
$(b)$	Chlorophyll $b$	$(i i)$	Accessory photosynthetic pigment
$(c)$	PS II	$(i i i)$	Photooxidation of $H_{2} O$
$(d)$	CAM	$(i v)$	Kranz anatomy

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 16

The C₄ plants are more photosynthetically efficient than C₃ plants because:

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 17

Assume a thylakoid which is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 18

Which of the following factors, besides being one of the reactants in the process of photosynthesis, indirectly affects its rate?

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 19

The Calvin cycle is found in

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 20

Read the given statements and select the correct option.
Statement I: In photosynthesis, during ATP synthesis, protons accumulate in the lumen of thylakoid.
Statement II: In respiration, during ATP synthesis, protons accumulate in the intermembranal space of mitochondria.

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 21

Consider the following statements on C₄ plants and select the correct option.
A. They are adapted to dry temperate regions.
B. They have a special type of leaf anatomy.
C. They show response to highlight intensities.
D. They lack a process called photo respiration.

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Biology Crash Course NEET>Chapter 13 - Photosynthesis in Higher Plants>Level 2>Q 22

Study the cyclic pathway given below.

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Select the incorrect statement concerning the above pathway.