Complex IV

Q. Enzymeslocated in mitochondrial membrane are ______.

1. Enolase and Catalase
2. Flavoproteinsand Cytochromes
3. Citrate synthetase and Glutamate dehydrogenase
4. Hexokinase and Zymase

Q. In the electron transport system present in the inner mitochondrial membrane, complexes I and IV respectively are ______.

1. NADH dehydrogenase and FADH₂
2. NADH₂ and NADH dehydrogenase
3. NADH dehydrogenase and cytochrome – c oxidase complex
4. NADH dehydrogenase and ATP synthase

Q. Which of the following is the correct sequence of electron acceptors in the electron transport chain?

1. Cytochrome $a,a_3,b,c$
2. Cytochrome $c,b,a,a_3$
3. Cytochrome $b,c,a_3,a$
4. Cytochrome $b,c,a,a_3$

Q. Which of the following is an inhibitor of the complex IV of ETC?

1. Rotenone
2. Amobarbital
3. Antimycin A
4. Carbon monoxide

Q. Cytochromes help in ____________.

1. synthesis of glucose
2. release of energy
3. growth
4. electron transport

Q. Which of the following is an inhibitor of the complex IV of ETC?

1. Rotenone
2. Amobarbital
3. Antimycin A
4. Carbon monoxide

Q. Which of the following is the correct sequence of electron acceptors in the electron transport chain?

1. Cytochrome $a,a_3,b,c$
2. Cytochrome $c,b,a,a_3$
3. Cytochrome $b,c,a_3,a$
4. Cytochrome $b,c,a,a_3$

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. In the electron transfer chain, during terminal oxidation, oxygen receives electrons from

1. cyt-c
2. cyt-b
3. cyt-a3
4. cyt-f

Q. Oxygen is directly utilised in

1. glycolysis
2. fermentation
3. electron transport chain
4. TCA cycle

Q. In the electron transfer chain, during terminal oxidation, oxygen receives electrons from

1. cyt-b
2. cyt-c
3. cyt-a3
4. cyt-f