ATP Synthase

Q.

The creation of proton gradient across the thylakoid membrane is a result of

1. Increase in pH in the lumen

2. Accumulation of protons in the stroma

3. Decrease in proton number in the stroma

4. Decrease in proton number in the stroma

Q.

Energy released during the movement of electrons through the photosystems in photosynthesis is used to drive protons across the membrane against the concentration gradient. As a result, the protons accumulate in

1. Intrathylakoid space

2. Thylakoid lumen

3. Stroma lamella

4. Stroma

Q. Which one of the following is an incorrect statement about mitochondrial ETC and oxidative phosphorylation?

1. Enzyme complex I accepts electrons and $H^{+}$ from NADH and $FAD{H}_2$
2. Passage of protons through the channel is coupled to the catalytic site of the $F_0-F_1$ particle for ATP production
3. Cytochrome-c is a mobile protein attached on the outer surface of the inner membrane
4. $6H^{+}$ ions pass through $F_0$ from intermembrane space to the matrix down the electrochemical proton gradient to produce 3 ATP molecules

Q.

Mitochondrial cristae are sites of:

1. Kreb’s cycle

2. Oxidation-reduction reaction

3. Protein synthesis

4. Lipid synthesis

Q. What is the end product of oxidative phosphorylation?

1. Oxygen
2. ATP
3. Pyruvate
4. Acetyl CoA

Q. Oxidative phosphorylation refers to

1. Anaerobic production of ATP
2. The citric acid cycle production of ATP
3. Production of ATP by chemiosmosis
4. Alcoholic fermentation

Q.

Consider the following statements regarding photosynthesis:

A. ATP formation during photosynthesis is termed photophorylation.

B. Kranz anatomy pertains to leaf.

C. Reduction of NADP⁺ to NADPH occurs during the Calvin cycle.

D. In a chlorophyll molecule, magnesium is present in the phytol tail.

Of the above statements,

1. B and C are correct.

2. C and D are correct.

3. A and C are correct.

4. A and B are correct.

5. A and D are correct.

Q. Which of the following is correct with respect to ATP synthase?

1. It is an active transport pump.
2. It is a facilitated diffusion channel.
3. It is a passive transport channel.
4. Both b and c are correct.

Q. how many atp molecules are formed through oxidative phosphorylation of one molecule of alpha ketoglutaric acid entering krebs cycle

Q. Oxidative phosphorylation occurs in the __________.

1. cytoplasm
2. chloroplast
3. mitochondria
4. nucleus

Q. How many molecules of ATP is produced from one molecule of ${\mathrm{FADH}}_2$?

1. 1
2. 2
3. 3
4. 4

Q.

What is oxidative phosphorylation?

Q. In plants, during aerobic respiration

1. ADP is converted to ATP
2. carbohydrates are synthesized
3. oxygen is released
4. none of the above

Q. Which one of the complexes present in the inner mitochondrial membrane, is involved in oxidative phosphorylation, but not in the electron transport chain?

1. Complex I
2. Cytochrome c oxidase
3. ATP synthase
4. Succinate dehydrogenase

Q. Which one of following is complex V of the ETS of inner mitochondrial membrane?

1. NADH dehydrogenase
2. Cytochrome oxidase
3. Ubiquinone
4. Succinate dehydrogenase
5. ATP synthase

Q.

After H⁺ ions release from lumen and help synthesise ATP what happens to them and how?

Q. In germinating seeds of castor, RQ is:

1. Zero
2. Less than one
3. One
4. More than one

Q. Oxysomes are present in

1. outer membrane of mitochondria
2. inner membrane of mitochondria
3. thylakoid matrix
4. thylakoid membrane

Q. The chemiosmotic theory is based on ____________.

1. accumulation of $N{a}^{+}$ ions
2. accumulation of $K^{+}$ ions
3. proton gradient
4. membrane potential

Q.

Mitochondrial component connected with ATP synthesis is

1. Inner membrane

2. Outer membrane

3. Matrix

4. F0–F1 particles

Q. The complex concerned with oxidative phosphorylation in inner mitochondrial membrane is:

1. Complex IV
2. Complex V
3. Complex III
4. Complex II