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1

AIPMT 2003

MCQ (Single Correct Answer)
Glycolysis is
A
oxidation of glucose to glutamate
B
conversion of pyruvate to citrate
C
oxidation of glucose to pyruvate
D
conversion of glucose to haem.

Explanation

Glycolysis is the oxidation of glucose. It is an anaerobic process and involves the degradation of glucose into two molecules of pyruvate with the generation of two molecules of ATP.
2

AIPMT 2002

MCQ (Single Correct Answer)
Which is not true statement?
A
$$\alpha $$-carbon of $$\alpha $$-amino acid is asymmetric.
B
All proteins are found in $$L$$-form
C
Human body can synthesise all proteins they need.
D
At pH = 7 both amino and carboxylic groups exist in ionised form.

Explanation

Some proteins are also found in the D-form.
3

AIPMT 2002

MCQ (Single Correct Answer)
Enzymes are made up of
A
edible proteins
B
proteins with specific structure
C
nitrogen containing carbohydrates
D
carbohydrates.

Explanation

Enzymes are proteins that act as catalyst for bio-chemical processes of life. They speed up these reactions enormously and with a high degree of selectivity.
4

AIPMT 2001

MCQ (Single Correct Answer)
Which is the correct statement?
A
Starch is a polymer of $$\alpha $$-glucose.
B
Amylose is a component of cellulose.
C
Proteins are composed of only one type of amino acid.
D
In cyclic structure of fructose, there are four carbons and one oxygen atom.

Explanation

Starch is also know as amylum which occurs in all green plants. A molecule of starch (C6H10O5)n is built of a large number of $$\alpha $$-glucose ring joined through oxygen-atom.

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