The main purpose of electron transport chain is to
Cycle NADH + H and back to NAD
Use the intermediate from TCA cycle
Breakdown pyruvic acid
All of the above
Related Questions
Four respiratory enzymes are given below. Arrange them in increasing order of the carbon number of the substrates on which they act.
I.    Enolase
II.    Aconitase
III.    Fumarase
IV.    Alcohol Dehydrogenase
II, IV, III, I
IV, I, II, III
I, IV, III, II
IV, I, III, II
Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?
Glucose-6-phosphate
Fructose, 6-bisphosphate
Pyruvic acid
Acetyl Co-A
Correct sequence of electron acceptor of ATP synthesis is
cyt-a, , b, c
cyt-b, c ,a,
cyt-b, c , , a
cyt-c, b, a,
During cellular respiration, the catabolism of fats, carbohydrates, and proteins converges at the formation of which key molecule?
ATP
NADH
Acetyl CoA
FADH2
During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?
Conversion of pyruvic acid to acetyl Co-A
Electron transport chain
Glycolysis
Krebs’ cycle
Calculation of ATP gain for every glucose is made on certain assumptions. Choose the correct option in accordance with the statement given above
The pathway functioning is sequential and orderly
One substrate forms the reactant for the others
TCA cycle and ETS pathway follow one after another
All of the above
The end product of oxidative phosphorylation is?
NADH
ADP
Which enzyme is directly responsible for substrate-level phosphorylation in the citric acid cycle?
Succinyl-CoA synthetase
Citrate synthase
Isocitrate dehydrogenase
α-Ketoglutarate dehydrogenase
The compounds which are oxidised during respiration are known as
Respiratory substrates
Oxalo acid
TCA cycle
None of these
Oxidation of one molecule of NADH gives rise to
3 ATP molecules
12 ATP molecules
2 ATP molecules
1ATP molecule
