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

If a plant utilizes PEP carboxylase for primary $\rm{CO_2}$ fixation, it is MOST likely adapted to which environment?

A

Hot and dry

B

Cold and wet

C

Shaded and humid

D

Aquatic

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

PYQ YEAR: 2017

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Photosynthesis, C4 pathway, Plant adaptations

Related Questions

In CAM-plants, carbon dioxide acceptor is

A

RuBP

B

PEP

C

OAA

D

PGA

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :CAM pathway, carbon fixation, photosynthesis

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

A

Tomato is a greenhouse crop which can be grown in $C{O_2}$ enriched atmosphere for higher yield

B

Light saturation for $C{O_2}$ fixation occurs at 10% of full sunlight

C

Increasing atmospheric $C{O_2}$ concentration upto 0.05% can enhance $C{O_2}$ fixation rate

D

${C_3}$ plants responds to higher temperatures with enhanced photosynthesis while ${C_4}$ plants have much lower temperature optimum

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Analyzing

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :photosynthesis, factors affecting photosynthesis, CO2 concentration, light intensity, temperature effect on C3 and C4 plants

PEPcase catalyse primary carboxylation step in

A

Maize

B

Wheat

C

Tomato

D

Potato

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, PEP carboxylase

The most crucial step of Calvin cycle

A

Involves usage of NADPH molecule

B

Is catalysed by RuBisCO

C

Is regeneration of substrate

D

Involves usage of ATP

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Calvin cycle, RuBisCO, photosynthesis

The primary $C{O_2}$ acceptor molecule in ${C_3}$ cycle is a

A

3-carbon aldose sugar

B

5-carbon ketose sugar

C

3-carbon ketose sugar

D

5-carbon aldose sugar

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Photosynthesis, C3 cycle, Carbon fixation, Ribulose-1, 5-bisphosphate (RuBP)

If the light becomes unavailable during photosynthesis then

A

Immediately biosynthetic process stops

B

Biosynthetic phase does not stops

C

Biosynthetic phase stopes forever

D

Biosynthetic phase continues for some time and then stops

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :photosynthesis, light-dependent reactions, light-independent reactions, energy storage

In C4 plants, the initial fixation of CO2 occurs in mesophyll cells, forming a 4-carbon compound. This compound then travels to bundle sheath cells, where it releases CO2. What is the PRIMARY advantage of this spatial separation of CO2 fixation and the Calvin cycle?

A

Increases the efficiency of light absorption

B

Minimizes photorespiration by increasing CO2 concentration around RuBisCO

C

Reduces the need for water

D

Allows the plant to fix CO2 at night

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Understanding

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :C4 Pathway, Photorespiration, Calvin Cycle

Which of these ensures that the RUBISCO functions as a carboxylase minimising the oxygenase activity at the site of ${O_2}$ fixation in ${C_4}$ plants?

A

Agranal chloroplast in bundle sheath cells

B

Special type of leaf anatomy

C

Breaking down of malic acid in bundle sheath cells

D

Much greater affinity of rubisco for $C{O_2}$ than for ${O_2}$ in bundle sheath cells

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Analyzing

🎯Difficulty :Medium

⚡ Time Required :3 mins

🔄Ncert Concepts :C4 photosynthesis, RUBISCO, carboxylase, oxygenase, malic acid, bundle sheath cells

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

Both G3P and DHAP are?

A

Trioses

B

3 – Carbon compounds

C

Isomers

D

All

Question Tags

📚 Subject:Botany

📑 Chapter:Photosynthesis in Higher Plants

🎯Topic:Dark Phase

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Biochemistry, Carbohydrates, Isomers, Trioses

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