Photosynthesis in higher plants Questions & answers free

Q 1 :
Phosphoenol pyruvate (PEP) is the primary $C O_{2}$ acceptor in [2017]

$C_{4}$ plants
$C_{2}$ plants
$C_{3} a n d C_{4}$ plants
$C_{3}$ plants

1

2

3

4

(1)

Q 2 :
Given below are two statements:
Statement I: The primary ${CO}_{2}$ acceptor in $C_{4}$ plants is phosphoenol pyruvate and is found in the mesophyll cells.
Statement II: Mesophyll cells of $C_{4}$ plants lack RuBisCO enzyme.
In the light of the above statements, choose the correct answer from the options given below: [2022]

Both statement I and statement II are correct.
Both statement I and statement II are incorrect.
Statement I is correct but statement II is incorrect.
Statement I is incorrect but statement II is correct.

1

2

3

4

(1)

In $C_{4}$ plants, the primary ${CO}_{2}$ acceptor is a 3-carbon molecule phosphoenol pyruvate (PEP) and is present in the mesophyll cells. The enzyme responsible for the fixation is PEP carboxylase or PEPcase. Mesophyll cells of $C_{4}$ plants lack RuBisCO enzyme, whereas bundle sheath cells are rich in an enzyme ribulose bisphosphate carboxylase-oxygenase (RuBisCO).

Q 3 :
What is the role of large bundle sheath cells found around the vascular bundles in $C_{4}$ plants? [2022]

To provide the site for photorespiratory pathway
To increase the number of chloroplast for the operation of Calvin cycle
To enable the plant to tolerate high temperature
To protect the vascular tissue from high light intensity

1

2

3

4

(2)

Q 4 :
The first stable product of ${CO}_{2}$ fixation in sorghum is: [2021]

phosphoglyceric acid
pyruvic acid
oxaloacetic acid
succinic acid

1

2

3

4

(3)

Sorghum is an example of $C_{4}$ plant, so the first stable product of ${CO}_{2}$ fixation in this plant is oxaloacetic acid.

Q 5 :
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant? [2016]

CAM
Nitrogen fixer
$C_{3}$
$C_{4}$

1

2

3

4

Topic Question Set

Q 1 :
Phosphoenol pyruvate (PEP) is the primary $C O_{2}$ acceptor in [2017]

Q 3 :
What is the role of large bundle sheath cells found around the vascular bundles in $C_{4}$ plants? [2022]

(2)

Q 4 :
The first stable product of ${CO}_{2}$ fixation in sorghum is: [2021]

Q 5 :
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant? [2016]

(4)

Want Us to Email you About Special Offers & Updates?

Topic Question Set

Q 1 : Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in [2017]

Q 3 : What is the role of large bundle sheath cells found around the vascular bundles in C4 plants? [2022]

(2)

Q 4 : The first stable product of CO2 fixation in sorghum is: [2021]

Q 5 : A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant? [2016]

(4)

Want Us to Email you About Special Offers & Updates?

Q 1 :
Phosphoenol pyruvate (PEP) is the primary $C O_{2}$ acceptor in [2017]

Q 3 :
What is the role of large bundle sheath cells found around the vascular bundles in $C_{4}$ plants? [2022]

Q 4 :
The first stable product of ${CO}_{2}$ fixation in sorghum is: [2021]

Q 5 :
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant? [2016]