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

Which of the following is NOT directly involved in the regeneration of RuBP during the dark phase of photosynthesis?

A

ATP

B

NADPH

C

ATP synthase

D

Several enzymes

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :0.5 mins

🔄Ncert Concepts :Dark Phase, Calvin Cycle, RuBP Regeneration, Photosynthesis

Related Questions

Presence of bundle sheath is a characteristic of

A

Xerophytic plants

B

Members of grass family

C

${C_4} -$ plants

D

${C_3} -$ plants

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Plant anatomy, Photosynthesis, C4 pathway, Bundle sheath

Which process is NOT essential for sexual reproduction?

A

Meiosis

B

Gamete formation

C

Fertilization

D

Binary fission

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

PYQ YEAR: 2021

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Reproduction, Sexual Reproduction, Asexual Reproduction

Bundle sheath cells are rich in which enzyme

A

PEP carboxylase

B

Malate dehydrogenase

C

Phosphofructokinase

D

RuBisCo

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Photosynthesis, C4 pathway, Enzyme function

Chloroplast dimorphism is a characteristic feature of

A

Plants with Calvin cycle

B

${C_4} -$ plants

C

All plants

D

Only in algae

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Chloroplast dimorphism, C4 plants, Photosynthesis

Which enzyme in the Calvin cycle is directly responsible for incorporating CO2 into an organic molecule?

A

3-phosphoglycerate kinase

B

Glyceraldehyde 3-phosphate dehydrogenase

C

RuBisCO

D

Triose phosphate isomerase

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Hard

⚡ Time Required :0.5 mins

🔄Ncert Concepts :Calvin Cycle, RuBisCO, Carbon Fixation

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

Which of the following statements regarding ${C_4} -$ plants is false?

A

They lack RuBisCo

B

They lack Kranz anatomy

C

They fix CO2 into a 4-carbon compound

D

They have a higher temperature optimum for photosynthesis

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Analyzing

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :C4 Photosynthesis, Carbon Fixation, Plant Anatomy, Enzyme Function

Main biosynthetic pathway for $C{o_2}$ fixation in ${C_4} -$ plant is

A

${C_4}$ pathway

B

${C_3} -$ pathway

C

${C_2}$ pathway

D

Both (a) and (b)

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, C4 pathway, C3 pathway, Carbon fixation

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:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Photosynthesis, Calvin cycle, C3 cycle, C4 cycle

How many calvin cycles are required to produce 5 molecules of glucose?

A

60

B

15

C

30

D

90

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Calvin cycle, glucose synthesis, stoichiometry

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