Multiple Choice QuestionsC4 plants have better productivity because
C4 plants absorb more light
C4 plants absorb more CO2
C4 plants does not carry photorespiration
C4 plants have more amount of RuBisCO
Assertion: Photorespiration interferes with the successful functioning of Calvin cycle.
Reason: Photorespiration oxidises ribulose1,5 biphosphate which is an acceptor of CO2 in Calvin cycle.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Photorespiration shows formation of
sugar but not ATP
ATP but not sugar
both ATP and sugar
neither ATP nor sugar
Which of the following is correctly labelled for the given figure
A: PS II; B : PS I; C :e- acceptor, D: LHC
A: LHC; B:e- acceptor; C: PS I; D: PS II
A: PS I; B:PS II; C:e- acceptor; D: LHC
A: e- acceptor; B : LHC; C: PS Il; D: PS I
Kranz anatomy is usually associated with
C3 plants
C4 plants
CAM plants
C3-C4intermediate plants.
Assertion : The efficiency of C4 plant is more than those of C3 plant.
Reason : C4 plants are more efficient in picking CO2.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
The efficiency of C4 plants is more than those of C3 plants because
(i) C4 plants are more efficient in picking up CO2 even when found in low concentration because of high affinity of PEP.
(ii) concentric arrangement of mesophyll cells produce a small area in relation to volume
(iii) they can tolerate excess salts because of the presence of organic acids
(iv) normal oxygen concentration is not inhibitory for the growth in contrast to C3 plants.
(v) they are adapted to high temperature and intense radiation of tropics.
The first stable product of Calvin cycle is
3- phosphoglycerate
1, 3 biphosphoglycerate
glyceralydehyde - 3 phosphate
ribulose - 5 - phosphate
Assertion : Due to pollution atmospheric concentration of CO2 is increasing which will be harmful for C4 plants whereas productivity is going to increase for C3 plants.
Reason : C4 plants have greater efficiency for CO2 as CO2 is fixed by PEP oxygenase.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Switch
