ETC
Trending Questions
Q. In photosynthesis, during the operation of LHC II, the excited P−680 is rapidly photo oxidized as it passes electrons to
- ferredoxin
- pheophytin
- Fe−S protein
- Co Q
Q. Which element is essential as electron carrier?
- Iron
- Potassium
- Zinc
- Calcium
Q. Z-scheme shows the non-cyclic electron flow of light reaction in oxygenic photosynthetic organisms. According to the Z-scheme, choose the correct statement(s) :
I. P+680 is the P680 molecule that lost its electron. It has the maximum reduction potential.
II. P∗680 is the excited P680 molecule after absorption of the light energy. It has the lowest reduction potential
III. Final electron acceptor of PS I is Fe-S centre
IV. Flow of high energy electron in the electron transport chain creates a pH difference between the chloroplast stroma and thylakoid lumen
I. P+680 is the P680 molecule that lost its electron. It has the maximum reduction potential.
II. P∗680 is the excited P680 molecule after absorption of the light energy. It has the lowest reduction potential
III. Final electron acceptor of PS I is Fe-S centre
IV. Flow of high energy electron in the electron transport chain creates a pH difference between the chloroplast stroma and thylakoid lumen
- Only I
- I and IV
- III and IV
- II, III and IV
Q.
RuBisCO is an enzyme that acts both as a carboxylase and oxygenase . why do you think RuBisCO carries out more carboxylation C4 Plants?
Q. Assertion : In case of cyclic photophosphorylation, there is no production of NADPH and oxygen.
Reason : As the electron flows cyclically and NADPH is present in sufficient amount in the cell, hence, cyclic photophosphorylation occurs to provide ATP to power other activities in chloroplast.
Reason : As the electron flows cyclically and NADPH is present in sufficient amount in the cell, hence, cyclic photophosphorylation occurs to provide ATP to power other activities in chloroplast.
- Both assertion and reason are true and the reason is a correct explanation of the assertion
- Both assertion and reason are true but reason is not the correct explanation of the assertion
- Assertion is true but the reason is false
- Both assertion and reason are false
Q. The image given below is the representation of:
- Non-cyclic photophosphorylation occurring in the membrane system of chloroplast
- Cyclic photophosphorylation occurring in the stroma
- Cyclic photophosphorylation occurring in the stroma thylakoid membrane
- None of these
Q. The substance 3-(3, 4-dichlorophenyl)-1, 1-dimethylurea (DCMU) is a photosynthetic inhibitor. Choose the correct statement about DCMU based on the above information:
- It can not block non-cyclic photophosphorylation
- It will have effect on the cyclic photophosphorylation
- It inhibits electron flow from plastoquinones to cytochrome b6f
- It inhibits photolysis of water
Q. glycolysis occur in type of organisms?