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Biomolecules Online MCQs

MCQs On Biomolecules

Biomolecules Important Questions and Answers

Question 1
Insulin is
A
Protein
B
A lipid
C
A carbohydrate
D
An amino acid
Question 2
Pepsin enzyme hydrolyses

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A
Polysaccharides to monosaccharides
B
Proteins to amino acids
C
Glucose to ethyl alcohol
D
Fats to fatty acids
Question 3
A biological catalyst is essentially
A
An amino acid
B
A nitrogen compound
C
An enzyme
D
A carbohydrate
Question 4
On complete hydrolysis of starch, we finally get
A
Glucose and fructose
B
Sucrose
C
Glucose
D
Fructose
Question 5
Glucose gives many reactions of aldehyde, because
A
It is a polyhydroxy ketone
B
It is hydrolysed to acetaldehyde
C
It is a hemiacetal in equilibrium with its aldehyde form in solution
D
It is a cyclic aldehyde
Question 6
Which one of the following statements is true for protein synthesis (translation)
A
Amino acid are directly recognized by m-RNA
B
Only one codon codes for an amino acid
C
The third base of the codon is less specific
D
Every t-RNA molecule has more than one amino acid attachment site
Question 7
Ascorbic acid is a

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A
Vitamin
B
Protein
C
Enzyme
D
Carbohydrate
Question 8
The safest and the most common alternative of sugar is

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A
Aspartame
B
Glucose
C
Cyclodextrin
D
Saccharin
Question 9
Which of the following is not an amino acid?

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A
Alanine
B
Glycine
C
Benzidine
D
Histidine
Question 10
Which does not show mutarotationSucrose
A
Fructose
B
Maltose
C
Sucrose
D
Glucose
Question 11
Vitamin B6 is known as
A
Pyridoxin
B
Tocopherol
C
Riboflavin
D
Thiamine
Question 12
The double helical structure of DNA was proposed by
A
Emil Fischer
B
Khorana
C
Watson and Crick
D
Meicher
Question 13
Which is a reducing sugar?
A
Fructose
B
All of these
C
Glucose
D
Galactose
Question 14
Galactose is converted into glucose in
A
Intestine
B
Liver
C
Stomach
D
Mouth
Question 15
The most important food reserves of animals and plants are

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A
Proteins
B
Carbohydrates
C
Fats
D
Vitamins
Question 16
Which amino acid has aromatic ring?
A
Glycine
B
Lysine
C
Alamine
D
Tyrosine
Question 17
The waxes are long chain compounds of fatty acids, which belong to the class of
A
Acetic acid
B
Esters
C
Alcohols
D
Ethers
Question 18
Which of the following monosaccharide is a pentose?
A
Galactose
B
Arabinose
C
Glucose
D
Fructose
Question 19
Read the following statements carefully
A
Muscles contain the protein keratin
B
Insulin is a hormone
C
Albumin is a simple protein
D
The amino acid alanine contains an acidic side chain
Question 20
The reason for double helical structure of DNA is operation of
A
Electrostatic attractions
B
Hydrogen bonding
C
Dipole-dipole interaction
D
Vander Waal's forces
Question 21
Which of the following is a conjugated protein?
A
Phosphoprotein
B
Glycoprotein
C
Chromoprotein
D
All of these
Question 22
Artificial silk is
A
Polysaccharides
B
Polyamides
C
Polyesters
D
Polyacids
There are 22 questions to complete.

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