1
MCQ (Single Correct Answer)

AIPMT 2001

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.
2
MCQ (Single Correct Answer)

AIPMT 2001


Which statement is incorrect about peptide bond?
A
C $$-$$ N bond length in proteins is longer than usual bond length of N $$-$$ C bond.
B
Spectroscopic analysis shows planar structure of group.
C
C $$-$$ N bond length in proteins is smaller than usual bond length of C $$-$$ N bond.
D
None of the above.

Explanation

Due to resonance C — N bond in protein acquires double bond character and is smaller than usual C — N bond.
3
MCQ (Single Correct Answer)

AIPMT 2001

Which of the following is correct?
A
Cycloheptane is an aromatic compound.
B
Diastase is an enzyme
C
Acetophenone is an ether.
D
All of these.

Explanation

Diastase is an enzyme. (The protein produced by living systems which acts as a biological catalyst). Enzymes are characterised by the name ending with -ase.
4
MCQ (Single Correct Answer)

AIPMT 2001

Which of the following is correct about H-bonding in nucleotide?
A
A $$-$$ T, G $$-$$ C
B
A $$-$$ G, T $$-$$ C
C
G $$-$$ T, A $$-$$ C
D
A $$-$$ A, T $$-$$ T

Explanation

Guanine G is linked to cytosine C by three hydrogen bonds and adenine A is linked with thymine T by two hydrogen bonds. It is abbreviate as : G ≡ C and A = T

EXAM MAP

Joint Entrance Examination

JEE Advanced JEE Main

Medical

NEET

Graduate Aptitude Test in Engineering

GATE CE GATE ECE GATE ME GATE IN GATE EE GATE CSE GATE PI