Study the pathway given below:

In which of the following options, correct words for all the three blanks A, B and C are indicated?

	A	B	C
1.	Fixation	Transamination	Regeneration
2.	Fixation	Decarboxylation	Regeneration
3.	Carboxylation	Decarboxylation	Reduction
4.	Decarboxylation	Reduction	Regeneration

During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?

The first stable product of CO₂ fixation in sorghum is:

1. Succinic acid

2. Phosphoglyceric acid

3. Pyruvic acid

4. Oxaloacetic acid

Which of the following statements is incorrect?

Both C4 and CAM plants employ physiological and biochemical strategies to reduce photorespiration. Which of the following is an accurate comparison of the two strategies?

1. C4 plants fix CO₂ as the 4-carbon acid oxaloacetate, while CAM plants fix CO₂ as the 5-carbon acid ribulose 1, 5-bisphosphate.

2. C4 plants fix CO₂ in the mesophyll but carry out the Calvin cycle in the bundle sheath, while CAM plants fix CO₂ and carry out the Calvin cycle in the mesophyll.

3. C4 plants fix CO₂ in the bundle sheath but carry out the Calvin cycle in the mesophyll, while CAM plants fix CO₂ and carry out the Calvin cycle in the bundle sheath.

4. C4 plants store CO₂ as phosphoglycolate, while CAM plants store CO₂ as oxaloacetate.

5. C4 plants carry out photosynthetic electron transport in the daytime, while CAM plants carry out photosynthetic electron transport at night.

Mark the odd one (with respect to internal factors affecting photosynthesis)

1. Amount of chlorophyll

2. Light intensity

3. Mesophyll cells

4. Orientation of leaves

Which of the following statements is incorrect?

(1) RuBisCO is a bifunctional enzyme

(2) In C4 plants, the site of RuBisCO activity is mesophyll cell

(3) The substrate molecule for RuBisCO activity is a 5-carbon compound

(4) RuBisCO action requires ATP and NADPH 

Emerson's enhancement effect and Red drop have been instrumental in the discovery of

1. two photosystems operating simultaneously

2. photophosphorylation and cyclic electron transport

3. oxidative phosphorylation

4. photophosphorylation and non-cyclic electron transport

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:

In light reaction, plastoquinone facilitates the transfer of electrons from:

1. Cytb₆f complex to PS-I

2. PS-I to NADP⁺

3. PS-I to ATP synthase

4. PS-II to Cytb₆f complex