Photosynthesis in Higher Plants
59 questions · Click an option and press Check Answer to reveal the result
When CO2 concentration in atmosphere is increased, the rate of photosynthesis in C3 and C4 plants will change as follows:
Increased in C3 and no effect in C4 plants
Increased in C3 and C4 plants
Increased in C3 and decreased in C4 plants
No effect on both C3 and C4 plants
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In C₄ plants photorespiration does not occur.
Reason (R) : C₄ plants have a mechanism that increase the concentration of CO₂ at the RuBisCO enzyme’s site i.e. mesophyll cell. This takes place when the C₄ acid is broken down in the mesophyll cells to release CO₂.
In the light of the above statements, choose the most appropriate answer from the option given below:
Read the following functions carefully:-
(i) H2O splitting
(ii) O2 release
(iii) NADPH formation
(iv) ATP consumption
How many functions among the above carried by PS-I during Z-scheme
Find the correct statements:
A : In Calvin cycle the reduction step involves utilisation of 2 molecules of ATP for phosphorylation and two of NADPH for reduction per CO₂ molecule.
B : In all photosynthetic plants, the first stable product of CO₂ fixation in Calvin cycle is 3-phosphoglyceric acid.
C : Chemiosmosis require a membrane, a proton pump, a electron gradient and ATP synthase.
D : Biosynthetic phase ‘or dark reactions of photosynthesis are not light dependent.
E : It is probably to meet the difference in number of ATP and NADPH used in the dark reaction that the cyclic photophosphorylation takes place.
Choose the correct answer from the options given below:
How many ATP and NADPH are required for the fixation of one molecule of CO2 in C4 cycle
The figure shows
