Biomolecules Test

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Biomolecules Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements is incorrect?

A
The molecules of proteins and enzymes are produced in the cell by nucleic acids.

B
There are two types of nucleic acids, namely DNA and RNA.

C
Nucleic acids are polymers of nucleotides.

D
Deoxyribonucleotide is a polymer of deoxyribonucleic acid.
Question 2
1 / -0

Which of the following is not a disaccharide?

A
Sucrose

B
Maltose

C
Lactose

D
Dextrose
Question 3
1 / -0

Sucrose in water is dextrorotatory, [αD] = +66.50. When boiled with dilute HCl, the solution becomes laevorotatory, [αD]= –39.5^o. In this process, the sucrose molecule breaks into

A
L-glucose + D-fructose

B
L-glucose + L-fructose

C
D-glucose + D-fructose

D
D-glucose + L-fructose
Question 4
1 / -0

The protein molecule present in haemoglobin is

A
thrombin

B
fibrinogen

C
globulin

D
casein

Question 5

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Match the statements/expressions in Column–I with the statements/expressions in Column–II and indicate your answer by selecting the appropriate option. Any statement in Column–I can correctly match with only one statement in Column–II.

Column–I	Column–II
(A) Peptide linkage (B) Polypeptide (C) Proteins (D) Zwitter ion	(a) Oxytocin (b) Molecular weight > 10,000 (c) –CO-NH- (d) Molecules having oppositely charged groups

(A) – (c), (B) – (a), (C) – (b), (D) – (d)

(A) – (d), (B) – (c), (C) – (b), (D) – (a)

(A) – (c), (B) – (d), (C) – (a), (D) – (b)

(A) – (a), (B) – (b), (C) – (c), (D) – (d)

Question 6
1 / -0

Which of the following enzymes converts starch into maltose?

A
Maltase

B
Diastase

C
Zymase

D
Invertase
Question 7
1 / -0

Identify the incorrect statement regarding vitamin B₁.

A
It is a fat-soluble vitamin.

B
It is also known as thiamine.

C
Its deficiency causes beriberi.

D
It is a sulphur-containing vitamin.
Question 8
1 / -0

Denaturation of proteins involves breakdown of

A
primary structure only

B
secondary structure only

C
primary, secondary and tertiary structures

D
secondary, tertiary and quaternary structures
Question 9
1 / -0

Oxime is formed by treating glucose with

A
Water

B
hydroxylamine

C
nitric acid

D
bromine water

Solution

Glucose reacts with hydroxylamine (NH2OH) to form an oxime. Oxime is formed by combination of carbonyl group of glucose and hydroxyl group of hydroxyl amine.
Question 10
1 / -0

Which of the following pairs is NOT correctly matched?

A
Retinol : Vitamin A

B
Thiamine : Vitamin B₂

C
Calciferol : Vitamin D

D
Biotin : Vitamin H
Question 11
1 / -0

Sucrose is formed by the union of

A
one molecule of glucose and one molecule of fructose

B
one molecule of glucose and one molecule of galactose

C
two molecules of glucose

D
two molecules of galactose
Question 12
1 / -0

Maltose is formed by the union of

A
one molecule of glucose and one molecule of fructose

B
one molecule of glucose and one molecule of galactose

C
two molecules of glucose

D
two molecules of galactose
Question 13
1 / -0

The following question has four choices out of which ONLY ONE is correct.

Amino acid having a hydrophilic side chain is

A
valine

B
leucine

C
lysine

D
phenylalanine
Question 14
1 / -0

The following question has four choices, out of which ONLY ONE is correct.

Which of the following statements about fructose is not correct?

A
Fructose reacts with five molecules of acetic anhydride to give a penta-acetate.

B
It is oxidised by nitric acid to give a mixture of trihydroxy glutaric, tartaric and glycolic acids.

C
Fructose is not oxidised by bromine water.

D
With excess of phenylhydrazine, it gives an osazone completely different from glucosazone.
Question 15
1 / -0

Which of the following bases is not common in DNA and RNA?

A
Adenine

B
Guanine

C
Thymine

D
Cytosine

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Biomolecules Test - 2

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Biomolecules Test - 2

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Question 1

The molecules of proteins and enzymes are produced in the cell by nucleic acids.

There are two types of nucleic acids, namely DNA and RNA.

Nucleic acids are polymers of nucleotides.

Deoxyribonucleotide is a polymer of deoxyribonucleic acid.

Question 2

Sucrose

Maltose

Lactose

Dextrose

Question 3

L-glucose + D-fructose

L-glucose + L-fructose

D-glucose + D-fructose

D-glucose + L-fructose

Question 4

thrombin

fibrinogen

globulin

casein

Question 5

(A) – (c), (B) – (a), (C) – (b), (D) – (d)

(A) – (d), (B) – (c), (C) – (b), (D) – (a)

(A) – (c), (B) – (d), (C) – (a), (D) – (b)

(A) – (a), (B) – (b), (C) – (c), (D) – (d)

Question 6

Maltase

Diastase

Zymase

Invertase

Question 7

It is a fat-soluble vitamin.

It is also known as thiamine.

Its deficiency causes beriberi.

It is a sulphur-containing vitamin.

Question 8

primary structure only

secondary structure only

primary, secondary and tertiary structures

secondary, tertiary and quaternary structures

Question 9

Water

hydroxylamine

nitric acid

bromine water

Solution

Question 10

Retinol : Vitamin A

Thiamine : Vitamin B2

Calciferol : Vitamin D

Biotin : Vitamin H

Question 11

one molecule of glucose and one molecule of fructose

one molecule of glucose and one molecule of galactose

two molecules of glucose

two molecules of galactose

Question 12

one molecule of glucose and one molecule of fructose

one molecule of glucose and one molecule of galactose

two molecules of glucose

two molecules of galactose

Question 13

valine

leucine

lysine

phenylalanine

Question 14

Fructose reacts with five molecules of acetic anhydride to give a penta-acetate.

It is oxidised by nitric acid to give a mixture of trihydroxy glutaric, tartaric and glycolic acids.

Fructose is not oxidised by bromine water.

With excess of phenylhydrazine, it gives an osazone completely different from glucosazone.

Question 15

Thiamine : Vitamin B₂