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.
2
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.
3
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.
4
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.
Questions Asked from Biomolecules
On those following papers in MCQ (Single Correct Answer) Number in Brackets after Paper Name Indicates No of Questions
