Chemiosmosis (related with respiration, photosynthesis ETS) does not require
1. Membrane, a proton pump.
2. ATP.
3. A proton gradient.
4. ATPase.

If there are 12 molecules of CO₂ to be fixed in photosynthesis, then how many turns of the Calvin cycle and how many molecules of glucose will be synthesized respectively?

1. 9 turns, 2 molecules.
2. 12 turns, 1 molecule.
3. 6 turns, 1 molecule.
4. 12 turns, 2 molecules.

The synthesis of one molecule of glucose during the Calvin cycle requires.

1. 12 molecules of ATP and 18 molecules of $NADP{H}_2$

2. 6 molecules of ATP and 12 molecules of $NADP{H}_2$

3. 18 molecules of ATP and 12 molecules of $NADP{H}_2$

4. 12 molecules of each of ATP and $NADP{H}_2$

Choose the correct labelling for given  figure

1. D-saturation point, E-Maximum photosynthesis.

2. A-achieved at high light intensity.

3. D-10% of total sunlight, E-Compensation point.

4. A-light saturation at 10% of total sunlight.

Which is not true regarding cyclic electron transfer system (ETS) in thylakoid membrane of higher plants?

1. Operates at low light intensity

2. Only PS I is involved

3. Acts as a back up for ATP synthesis

4. External electron donor is required

Stroma lamella in plastid lacks

1. PS II and PS I.
2. PS II and NADP reductase.
3. PS I and NAD reductase.
4. PS II only.

Study the pathway ATP synthesis through chemiosmosis given below –

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

1. A – F₁, B – Thylakoid membrane, C – Photosystem (I), D – Photosystem (II)
2. A – F₀, B – Thylakoid membrane, C – Photosystem (I), D – Photosystem (II)
3. A – F₁, B – Thylakoid membrane, C – Photosystem (II), D – Photosystem (I)
4. A – F₀, B – Thylakoid membrane, C – Photosystem (II), D – Photosystem (I)

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