Oxidation of Pyruvate

Q.

What are examples of catabolic reactions?

Q.

Most of the enzymes of the TCA cycle are present in

1. Intermembrane space of mitochondria

2. Mitochondrial matrix

3. Inner membrane of mitochondria

4. Cytoplasm

Q.

The site of glycolysis is

1. Mitochondrial inner membrane

2. Cytoplasm

3. Chloroplast

4. Mitochondrial matrix

Q.

Glycolysis occurs in

1. cytoplasm

2. chloroplast

3. peroxisome

4. mitochondria

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

1. phosphorylation
2. isomerisation
3. pyruvate oxidation
4. dehydration

Q.

In aerobic respiration, first CO2 is liberated during ______.

1. Oxidation of pyruvic acid

2. Decarboxylation of oxalosuccinic acid

3. Decarboxylation of a ketoglutaric acid

4. Alcoholic fermentation

Q.

The end product of glycolysis is

1. NADH

2. acetyl-CoA

3. lactate

4. pyruvate

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

1. 4
2. 2
3. 1
4. \N

Q.

Pyruvate is oxidized when oxygen is present.

1. True

2. False

Q.

Hans Krebs discovered (worked out the details of)

1. the citric acid cycle

2. glycolysis

3. the oxidation of pyruvate

4. fermentation

Q.

Where do the enzymatic reactions of the Calvin cycle take place?

1. stroma of the chloroplast

2. thylakoid membranes

3. outer membrane of the chloroplast

4. electron transport chain

Q.

RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C₄ plants?

Q. Which of the following is the connecting link between glycolysis and Krebs cycle?

1. Acetyl CoA
2. Oxaloacetic acid
3. Pyruvic acid
4. Citric acid

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. I and II
3. I, II and III
4. I, II and IV
5. III and IV

Q. The formation of Acetyl CoA from pyruvic acid involves

1. reduction
2. dehydration
3. phosphorylation
4. oxidative decarboxylation

Q. Intermediate that is common to fatty acid and carbohydrate oxidation is:

1. Pyruvate
2. Acetyl CoA
3. Fructose-1, 6-bisphosphate
4. DHAP

Q.

What is released when in CAM cycle Oxalo acetic acid is converted into Mallic acid during Night ? NADPH or NADH

Q.

Oxidation of pyruvate to carbon dioxide and water occurs through

1. citric acid cycle

2. Tricarboxylic cycle

3. Krebs cycle

4. All the above

Q. Pyruvate dehydrogenase complex is used in converting

1. pyruvate to glucose
2. glucose to pyruvate
3. pyruvic acid to lactic acid
4. pyruvate to acetyl CoA

Q. What happens to pyruvate, which is formed by the glycolytic catabolism of carbohydrates in the cytosol, when it enters the mitochondrial matrix?

1. Oxidative carboxylation
   
2. Oxidative decarboxylation
   
3. Reductive carboxylation
   
4. Carboxylation
   

Q.

Do humans use lactate dehydrogenase?

Q. Which of the following is the connecting link between glycolysis and Krebs cycle?

1. Pyruvic acid
2. Oxaloacetic acid
3. Acetyl CoA
4. Citric acid