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 a CAM-plant, the concentration of organic acid

A

Increases during the day

B

Decreases or increases during the day

C

Increases during night

D

Decreases during any time

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :CAM photosynthesis, organic acid accumulation, day-night cycle

The type of compounds not formed in ${C_3}$ plants is?

A

2C Compound

B

5C Compound

C

3C Compound

D

4C Compound

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, C3 pathway, Carbon fixation

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, 3-phosphoglycerate, phosphoglycolate

In a chloroplast, the reduction of carbon dioxide to form glucose during photosynthesis occurs in the:

A

Thylakoid lumen

B

Intermembrane space

C

Grana

D

Stroma

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

PYQ YEAR: 2015

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Photosynthesis, Calvin cycle, Carbon dioxide reduction, Glucose synthesis

Organelles involved in photorespiration is/are

I. chloroplast

II. peroxisomes

III. mitochondria

Choose 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:Remembering

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :photorespiration, chloroplast, peroxisomes, mitochondria

RUBP is?

A

First stable compound in PCR cycle

B

Substrate for reduction phase

C

Last compound of carboxylation phase

D

Primary $C{O_2}$ acceptor of RPP cycle

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, Calvin Cycle, Carbon Fixation, RuBP

Given below are two statements:

Statement I: In $C_3$ plants, increased $O_2$ levels can lead to decreased $CO_2$ fixation due to competition with RuBisCO.

Statement II: In $C_4$ plants, photorespiration is significantly reduced in mesophyll cells and nearly absent in bundle sheath cells.

In the light of the above statements, choose the correct answer from the options given below:

A

Both Statement I and Statement II are correct

B

Both Statement I and Statement II are incorrect

C

Statement I is correct but Statement II is incorrect

D

Statement I is incorrect but Statement II is correct

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 statement is false in case of ( ${C_4} -$ plant)?

A

$C{O_2}$ acceptor is RuBisCo in mesosphyll cell

B

Carboxylation occurs in mesophyll cells

C

Leaves have two cell types

D

Mesophyll cells lack Rubisco

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, RuBisCO, Mesophyll cells, Bundle sheath cells, Carbon fixation

Which pair is wrong?

A

${C_3}$ - Maize

B

${C_4}$ - Kranz anatomy

C

Calvin cycle - PGA

D

${C_4}$ - OAA

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Analyzing

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Photosynthesis, C3 Pathway, C4 Pathway, Calvin Cycle, Kranz Anatomy, Photorespiration

If a plant is exposed to $^{14}CO_2$ in the dark and then transferred to light, the $^{14}C$ label will appear first in which of the following carbohydrates?

A

Starch

B

Sucrose

C

Triose phosphates (glyceraldehyde-3-phosphate and dihydroxyacetone phosphate)

D

Fructose-1,6-bisphosphate

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, Carbohydrate Synthesis

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