Why photorespiration does not take place in C₄ plants?
1. Do not contain RuBisCo.
2. Have a mechanism that increases the concentration of CO₂ at the enzyme site.
3. Cells do not allow oxygen to accumulate in them.
4. Cells are impermeable to oxygen.

Sunlight is essential for photosynthesis is established
by
1. Jan Ingenhousz
2. Robert Hill
3. Emerson
4. Julius Von Sach

The following processes occur during photosynthesis

(i) Reduction of carbon dioxide

(ii) The splitting of water

(iii) The synthesis of glucose

(iv) Release of oxygen

(v) Formation of ATP

Which one of the following combinations is correct for the light phase ?

1. i, ii and iii

2. iii, iv and v

3. i, iii and iv

4. ii, iv and v

Select the Incorrect statement from the following.

1. Nostoc performs oxygenic photosynthesis.

2. During photorespiration, O${}_2$ is first utilized in chloroplast, and CO${}_2$ is released in mitochondria.

3. In a chloroplast, lumen of thylakoids always have least number of protons during
photophosphorylation .

4. In the plants like sugarcane and Amaranthus, primary CO${}_2$ acceptor is phosphoenol pyruvate.

Match the following columns and select the correct option.

1. a (ii), b (iv), c (iii), d (i)
2. a (iii), b (iv), c (ii), d (i)
3. a (ii), b (i), c (iii), d (iv)
4. a (iii), b (i), c (ii), d (iv)

Proton gradient develops across the thylakoid membrane due to all, except
1. Splitting of water towards lumen side
2. NADP⁺ reduction towards stroma side
3. Movement of protons from lumen to stroma side by PQ
4. Release of H⁺ from stroma to lumen side by a H-carrier

C₄ and CAM plants have many similarities, like
1. Secondary CO₂ fixation by Rubisco
2. Scotoactive stomata
3. Primary CO₂ fixation by PEPCase in bundle sheath
4. Presence of Kranz anatomy

In photorespiration (C₂ cycle)
1. Glycolate is oxidised in mitochondria
2. CO₂ is released in peroxisome
3. Expenditure of ATP occurs
4. Light is utilised by all three organelles involved

Calvin cycle (C₃ cycle)

In Hatch and Slack pathway, the primary CO₂ acceptor is -

1. Oxaloacetic acid

2. Phosphoglyceric acid

3. Phosphoenol pyruvate

4. Rubisco