Multiple Choice Questions on Chemiosmosis and ATP synthesis

MCQ on Chemiosmosis

1. Chemiosmotic theory was proposed by?

a) J D Watson

b) Peter Mitchell

c) Francis Crick

d) H G Khorana

2. The organelle of chemiosmosis in cellular respiration is  

a) nucleoplasm

b) peroxisome

c) chloroplast

d) mitochondrion

3. Which of the following are the major events in chemiosmosis?

a) electron flow and release of energy

b) proton gradient formation

c) PMF driven ATP synthesis

d) all of these

4. According to chemiosmosis, electrons are donated by

a) NADH and FADH2

b) NADH and ATP

c) ATP and FADH2

d) NADH and FMN

5. The site of electron flow in chemiosmosis is

a) Mitochondrion

b) Outer Mitochondrial membrane

c) Inner Mitochondrial membrane

d) Mitochondrial matrix

6. The energy released from electron flow is used to pump protons (H+) from

a) Intermembrane space to cytoplasm

b) Outer Mitochondrial membrane to inner Mitochondrial membrane

c) Mitochondrial matrix to intermembrane space

d) Inner Mitochondrial membrane to outer Mitochondrial membrane

7. The site of proton gradient formation is   

a) Mitochondrial matrix

b) intermembrane space of mitochondria

c) Inner Mitochondrial membrane

d) outer Mitochondrial membrane

8. ATP synthesis by ATP synthase is driven by

a) H+ movement

b) electron movement

c) NADH movement

d) All of these

9. ATP synthase synthesise ATP and release ATP towards

a) Mitochondrial matrix

b) Inner Mitochondrial membrane

c) outer Mitochondrial membrane

d) intermembrane space

10. Chemiosmosis and associated ATP synthesis in photosynthesis take place in

a) inner mitochondrial membrane

b) thylakoid membrane of chloroplast in light reaction

c) stroma of chloroplast in dark reaction

d) thylakoid lumen of chloroplast in light reaction

Answers

1. b) Peter Mitchell

2. d) mitochondrion

3. d) all of these

4. a) NADH and FADH2

5. c) Inner Mitochondrial membrane

6. c) Mitochondrial matrix to intermembrane space

7. b) intermembrane space of mitochondria

8. a) H+ movement

9. a) Mitochondrial matrix

10. b) thylakoid membrane of chloroplast in light reaction