NEET Biology MCQ: NCERT Photosynthesis Dark Phase | NEET.Guide Questions

A scientist isolates chloroplasts and provides them with $^{14}CO_2$ in the dark. After a brief period, the $^{14}C$ is found predominantly in:

A

RuBP

B

3-PGA

C

Glucose

D

Triose phosphate

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :Calvin Cycle, Carbon Fixation, Dark Reactions

Related Questions

Photorespiration is also called

I. Glycolate pathway

II. ${C_3} -$ cycle

III. Oxidative photosynthetic carbon cycle

Select the correct option

A

I and II

B

II and III

C

III and I

D

I, II and III

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :photorespiration, glycolate pathway, C3 cycle, oxidative photosynthetic carbon cycle

Synthesis of one molecule of glucose requires

A

6CO $2$ , 18 ATP and 12 NADPH

B

6CO $2$ , 12 ATP and 18 NADPH

C

6CO $2$ , 30 ATP and 12 NADPH

D

6CO $2$ , 38 ATP and 12 NADPH

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :photosynthesis, calvin cycle, ATP, NADPH, glucose synthesis

I. $C{O_2}$ is assimilated into sugars

II. RUBP is regenerated

III. ATP and NADPH are formed

Select the correct option in context to Calvin cycle

A

I and II

B

II and III

C

I and III

D

I, II and III

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Calvin cycle, Carbon fixation, RuBP regeneration, ATP and NADPH

In ${C_3}$ cycle for the fixation of every $C{o_2}$ molecules, the reduction and regeneration steps required

A

3 ATP and 2 NADPH $2$

B

2 ATP and 2 NADPH $2$

C

2 ATP and 3 NADPH $2$

D

3 ATP and 3 NADPH $2$

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :C3 cycle, photosynthesis, ATP, NADPH

In ${C_3}$ cycle for the fixation of every $C{o_2}$ molecules, the reduction and regeneration steps required

A

3 ATP and 2 NADPH for reduction, and 3 ATP for regeneration

B

2 ATP and 2 NADPH for reduction, and 1 ATP for regeneration

C

1 ATP and 1 NADPH for reduction, and 2 ATP for regeneration

D

2 ATP and 1 NADPH for reduction, and 2 ATP for regeneration

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :C3 cycle, carbon fixation, ATP, NADPH

I. Initial $C{O_2}$ acceptor

II. Extent of photorespiration

III. Enzyme catalysing reaction that fixes $C{O_2}$

IV. Presence of Calvin cycle

V. Leaf anatomy

Which one does not differ in a ${C_3}$ and ${C_4} -$ plants?

A

I and V

B

Only IV

C

II and III

D

Only II

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Leaf anatomy, Kranz anatomy, C3 photosynthesis, C4 photosynthesis

I. Initial $C{O_2}$ acceptor

II. Extent of photorespiration

III. Enzyme catalysing reaction that fixes $C{O_2}$

IV. Presence of Calvin cycle

V. Leaf anatomy

Which one does not differ in a ${C_3}$ and ${C_4} -$ plants?

A

I and V

B

Only IV

C

II and III

D

Only II

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, C3 cycle, C4 cycle, RuBisCO, PEP carboxylase

In ${C_4} -$ plants the bundle sheath cells

A

Have thin walls to facilitate gaseous exchange

B

Have large intercellular spaces

C

Are rich in PEP carboxylase

D

Have a high density of chloroplasts

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :C4 photosynthesis, bundle sheath cells, chloroplasts, PEP carboxylase

How does the presence of $O_2$ affect $CO_2$ fixation in $C_3$ plants, and how do $C_4$ plants mitigate this effect?

A

$O_2$ competes with $CO_2$ for RuBisCO in $C_3$ plants, reducing $CO_2$ fixation. $C_4$ plants concentrate $CO_2$ around RuBisCO in bundle sheath cells, minimizing this competition.

B

$O_2$ enhances $CO_2$ fixation in $C_3$ plants. $C_4$ plants have no mechanism to regulate $O_2$ levels.

C

$O_2$ has no effect on $CO_2$ fixation in $C_3$ plants. $C_4$ plants use PEP carboxylase to fix $O_2$ .

D

$O_2$ inhibits $CO_2$ release in $C_3$ plants. $C_4$ plants store excess $O_2$ in mesophyll cells.

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

PYQ YEAR: 2024

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, C3 plants, C4 plants, Photorespiration

${C_3}$ plants among the following are

A

maize

B

tomato

C

bell pepper

D

2 and 3

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :C3 plants, photosynthesis

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