Oxidation of Pyruvate

Q. The connecting link reaction between glycolysis and Krebs cycle is _______.

1. dehydration

2. phosphorylation

3. isomerisation

4. pyruvate oxidation

Q. Link enzyme in cellular respiration which catalyzes the substrate produced during glycolysis, and funnels it into the Kreb's cycle is ______.

1. Succinyl thiokinase
2. Isocitrate dehydrogenase
3. Citrate synthetase
4. Pyruvate dehydrogenase

Q.

In aerobic respiration, first CO2 is liberated during ______.

1. Decarboxylation of oxalosuccinic acid

2. Alcoholic fermentation

3. Oxidation of pyruvic acid

4. Decarboxylation of a ketoglutaric acid

Q. Pyruvate dehydrogenase is the enzyme that converts __________.

1. Glucose to pyruvate
2. Pyruvate to acetyl CoA
3. Pyruvic acid into lactic acid
4. Pyruvate to glucose

Q. Which one of the following reactions is an example of oxidative decarboxylation?

1. Conversion of succinate to fumarate
2. Conversion of fumarate to malate
3. Conversion of citrate to isocitrate
4. Conversion of pyruvate to acetyl Co-A

Q. Select the wrong statement.

1. The intermediate compound which links glycolysis with Krebs' cycle is malic acid
2. When tripalmitin is used as a substrate in respiration, the RQ is 0.7
3. The scheme of glycolysis was given by Embden, Meyerhoff and Paranas
4. One glucose molecule yields a net gain of 2 ATP molecules during fermentation
5. One glucose moelcule yields a net gain of 36 ATP molecules during aerobic respiration

Q. Oxidative decarboxylation of pyruvic acid results in the formation of
I. Acetyl Co-A
II. $C{O}_2$
III. ATP
IV. $NADH+H^{+}$
Select the correct answer using the codes given below

1. Only I
2. III and IV
3. I and II
4. I, II and III
5. I, II and IV

Q. How many NADH molecules are produced during formation of acetyl CoA from pyruvic acid?

1. 0
2. 4
3. 2
4. 1

Q.

In yeast, which of the following does not occur during anaerobic respiration?

1. Formation of phosphoglyceric acid

2. Formation of acetyl CoA

3. Formation of acetaldehyde

4. Formation of ATP

Q. Oxidative decarboxylation occurs in

1. Cristae
2. Mitochondrial matrix
3. Intermembrane space of mitochondria
4. Cytosol