The chemiosmotic coupling hypotheisis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because

(1) a proton gradient forms across the inner mitochondrial membrane. 

(2) There is a change in the permeability of the inner mitochondrial membrane towards adenosine diphosphate (ADP).

(3) high energy bonds are formed in mitochondrial proteins

(4) ADP is pumped out of the matrix into the intermembrane space.

Subtopic:  Light Reactions :3 | Light Reactions |
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Which of the following is incorect about the light reactions of photosynthesis?

(1) P680 and P700 are the reaction centres of PS-I, and PS-II respectively

(2) Light energy provides energy for the photolysis of water through excitation of the reaction centre of PS-II

(3) NADPH is not produced in cyclic electrons transport in light reactions

(4) Reactions of the two photosystems are needed for the reduction of NADP

Subtopic:  Light Reactions :3 | Light Reactions |
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In blue-green algae, photosystem- II contains important pigment concerned with photolysis of water. It is a

(1) phycocyanin           

(2) cytochrome-c

(3) chlorophyll -b         

(4) β-carotene

Subtopic:  Photosystems |
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In Kranz anatomy, the bundle sheath cells have

(1) thin walls, many intercellular space and no chloroplast

(2) thick walls, no intercellular spaces and large number of chloroplasts

(3) thin walls, no intercellular spaces and several chloroplasts

(4) thick walls, many intercellular space and few chloroplasts

Subtopic:  Dark Reaction: Biosynthetic Phase |
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The C4 plants differ from C3 plants with reference to the 

(1) substrate that accepts CO2 in carbon assimilation

(2) type of end product

(3) type of pigment involved in photosynthesis

(4)  end product that will be formed 

Subtopic:  Dark Reaction: Biosynthetic Phase | Light Reactions :1 | Light Reactions |
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Match the Columns.

Column I

(Scientists)

Column II

(Discoveries)

A. Stephen Hales

1. Importance of light and chlorophyll

B. Ingen Housz

2. Presence of chlorophyll in plants.

C. Von Mohl

3. Product of photosynthesis is starch.

D. Sach

4. Air and light control plant growth.

Code 

 

A     

B    

C    

D

(1)  

4

1

2

3

(2)

3

2

1

4

(3)

2

3

4

1

(4)

4

3

2

1

Subtopic:  Historical View: Experiments |
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Photosynthesis is a-
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process

Subtopic:  Introduction |
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Which of the following statements do not justify the importance of photosynthesis?
a. it is the primary source of all food on earth.
b. it is responsible for the release of oxygen into the atmosphere.
c. it is responsible for the water balance on earth.
d. use of energy from sunlight by plants doing photosynthesis is the basis of life on earth.

Subtopic:  Introduction |
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Which of the following is not required in photosynthesis?
a. chlorophyll
b. Light
c. CO2
d. O2

Subtopic:  Introduction |
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The half-leaf experiment, where a part of the leaf is enclosed in a test tube containing some KOH soaked cotton was performed, which showed that _________ was required for photosynthesis?
a. Light
b. Chlorophyll
c. CO2
d. O2

Subtopic:  Historical View: Experiments |
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