10@10 Carbohydrates

1.

1 point

Fluoride, used in the collection of blood samples for glucose estimation, inhibits the enzyme:

Glucokinase

Hexokinase

Enolase

Glucose-6-phosphatase

2.

1 point

All of the following occur in mitochondria except:

Citric acid cycle (Kreb’s cycle)

Glycogenolysis

Fatty acid oxidation

Electron transport chain

3.

1 point

Anaerobiosis leads to lactate formation in muscle due to
which one of the following?

Inhibiting hexokinase by glucose-6-phosphate

Providing 2,3-bisphosphoglycerate for the phosphoglyceromutase reaction

Inhibiting pyruvate kinase by pyruvate

Providing substrate for glyceraldehyde-3-phosphate dehydrogenase

4.

1 point

The energy yield from the complete oxidation of acetyl-
CoA to carbon dioxide is which of the following in terms
of high-energy bonds formed?

6

8

10

12

5.

1 point

The following are true about the oxidation of glucose except

glycolysis produces 3% of the energy ultimately obtained from glucose

the first stage of glycolysis involves phosphorylation of glucose to 1,6-fructose biphosphate

glycolysis occurs within the mitochondria

glucose enters the Kreb's cycle as pyruvate

6.

1 point

which of the following is true about gluconeogenesis:

it occurs in kidney

it occurs in adipose tissue

it is inhibited by glucagon

it is stimulated by insulin

7.

1 point

In mucopolysaccharidoses which of the following doesnt occur

the production of proteoglycan is increased

the urine excretes excess oligosaccharides

hunter and hurler are examples

the body has an increased accumulation of glycoaminoglycans

8.

1 point

In muscle, under anaerobic conditions, the net synthesis
of ATP starting from one mole of glucose derived from
muscle glycogen is which one of the following?

1 mole of ATP

2 mole of ATP

3 mole of ATP

4 mole of ATP

9.

1 point

Regarding HMP shunt all of the following are true except:

Occurs in the cytosol

No ATP is produced in the cycle

It is active in Adipose tissue, Liver and Gonads

The oxidative phase generates NADPH and the Non oxidative phase generates pyruvate

10.

1 point

Enzyme responsible for complete oxidation of glucose to Carbon dioxide and water is present in

Cytosol

Mitochondria

Lysosomes

Endoplasmic reticulum