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

In the context of photorespiration, what are the immediate products formed when RuBisCo acts as an oxygenase?

A

Two molecules of phosphoglycerate

B

One molecule of phosphoglycerate and one molecule of phosphoglycolate

C

Two molecules of phosphoglycolate

D

One molecule of phosphoglyceraldehyde and one molecule of phosphoglycolate

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

PYQ YEAR: 2020

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Photorespiration, Photosynthesis, RuBisCo

$RuBP + {O_2}\xrightarrow{X}PGA +$ Phosphoglycolate.Identify x in the given equation and choose the correct option

A

RuBP carboxylase

B

RuBP oxygenase

C

RuBisCo

D

PEP-carboxylase

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, Photorespiration, RuBisCO, RuBP oxygenase, Carbon Fixation

In the Calvin cycle, the enzyme responsible for the carboxylation of RuBP is:

A

PEP carboxylase

B

RuBisCO

C

Hexokinase

D

Aldolase

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :0.5 mins

🔄Ncert Concepts :Dark Phase, Calvin Cycle, RuBisCO, Carboxylation

Rubisco enzyme is absent in

A

Plants

B

Algae

C

Animals

D

Photosynthetic bacteria

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, Rubisco enzyme, C3 plants, C4 plants, cell types

Choose the correct statement.

A

The area of a circle is proportional to the square of its circumference.

B

The area of a circle is proportional to its circumference.

C

The circumference of a circle is proportional to the square root of its area.

D

The circumference of a circle is proportional to the square of its area.

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, RuBisCO, PEP carboxylase, RuBP, PGA, Phosphoglycolate, Mesophyll cells, Bundle sheath cells

RuBisCo's oxygenase activity leads to the formation of 2-phosphoglycolate, a __-carbon compound.

A

Two

B

Three

C

Four

D

Five

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

PYQ YEAR: 2020

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Photorespiration, Photosynthesis, RuBisCo

The oxygenation activity of ${\rm{RuBisCo}}{\rm{.}}$ enzyme in photorespiration leads to the formation of

A

${\rm{2}}$ molecules of ${\rm{3}}\,{\rm{ - }}\,{\rm{C}}$ compound

B

${\rm{1}}$ molecule of ${\rm{3}}\,{\rm{ - }}\,{\rm{C}}$ compound

C

${\rm{1}}$ molecule of ${\rm{6}}\,{\rm{ - }}\,{\rm{C}}$ compound

D

${\rm{1}}$ molecule of ${\rm{4}}\,{\rm{ - }}\,{\rm{C}}$ compound and ${\rm{1}}$ molecule of ${\rm{2}}\,{\rm{ - }}\,{\rm{C}}$ compound

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :photorespiration, RuBisCO, oxygenation, carbon compounds

Which of the following characteristics out of A, B and C are exhibited by ${C_4} -$ plants? A. Kranz anatomy B.The product of photosynthesis is oxaloacetic acid C. Both PEP carboxylase and ribulose-bisphosphate carboxylase act as carboxylating enzymes.

A

Only A and B, but not C

B

Only B and C, but not A

C

Only A and C, but not B

D

All A, B and C

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :C4 photosynthesis, Kranz anatomy, PEP carboxylase, Rubisco, oxaloacetic acid

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

Rubisco enzyme is absent in

A

Mesophyll cells

B

Bundle sheath cells

C

Malignant melanoma cells

D

Guard cells

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, Rubisco, C3 plants, C4 plants, Mesophyll cells, Bundle sheath cells

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