Biomolecules Test

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Biomolecules Test - 80

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Weekly Quiz Competition

Question 1
1 / -0

GH promotes :

A
bone growth

B
cell division

C
protein synthesis

D
all of the above

Solution

Growth hormone is a 191-amino acid, single-chain polypeptide that is synthesized, stored and secreted by somatotropic cells within the lateral wings of the anterior pituitary gland. GH is a stress hormone that raises the concentration of glucose and free fatty acids.growth hormone promotes the growth of bones, muscles and various other organs, too much of it causes abnormal growth of all these tissues, a condition that is referred to as gigantism when it applies to children and acromegaly when it applies to adults. It synthesizes protein also.
Question 2
1 / -0

First scientist to find out protein nature of enzyme was

A
Kuhne

B
Buchner

C
Sumner

D
Altman et al

Solution

American chemist James B. Sumner discovered the protein nature of enzymes and developed a general crystallization method for enzymes. The enzyme he worked with was urease, which he isolated from jack beans. He accomplished this by mixing purified urease with acetone and then chilling it; the chilled solution produced crystallized urease. He was also able to show by chemical tests that his pure urease was a protein. This was the first experimental proof that an enzyme is a protein.
So, the correct answer is 'Sumner'.
Question 3
1 / -0

In double strand helix structure of DNA, heterocyclic base cytosine forms hydrogen bond with:

A
adenine

B
guanine

C
purine

D
thymine

E
uracil

Solution

Base-guanine of DNA-structure forms hydrogen bond with cytosine to get double strand helix structure.
$$A\rightarrow T$$
$$C\rightarrow G$$ (pairing)
Question 4
1 / -0

Carbohydrate digestion begins in

A
Stomach

B
Mouth

C
Intestine

D
All the above
Question 5
1 / -0

Nongenetic RNA is of

A
Two types

B
Three types

C
Four types

D
One type
Solution
There are 3 types of non genetic RNA's
mRNA = messenger RNA
tRNA = transfer RNA
rRNA = ribosomal RNA
Correct option B
Question 6
1 / -0

Which of the following refers to particularly stable arrangements of amino acid residues in a protein that give rise to recurring patterns?

A
Primary structure

B
Secondary structure

C
Tertiary structure

D
Quaternary structure

Solution

Secondary structure refers to stable arrangements of amino acid residues giving rise to recurring structural patterns
Question 7
1 / -0

Which gives only glucose by hydrolysis?

A
Sucrose

B
Raffinose

C
Maltose

D
Galactose

Solution

Sucrose has glucose and fructose, maltose has two units of glucose, raffinose has glucose, fructose and galactose. Galactose is a monosaccharide.

Hence, on hydrolysis maltose gives only glucose.
Question 8
1 / -0

The sugar moiety present in $$RNA$$ molecule is:

A
$$\beta - D - 2 -$$ deoxyribose

B
$$\beta - D -$$ galactose

C
$$\beta - D -$$ fructofuranose

D
$$\beta - D -$$ ribose

E
$$\beta - D -3-$$ ribose

Solution

RNA molecule is composed of phosphoric acid, a pentose sugar and some cyclic bases containing nitrogen. RNA has β-D-ribose in it as the sugar moiety.
Option D is correct.
Question 9
1 / -0

How many amino acids are present in insulin?

A
$$25$$

B
$$51$$

C
$$20$$

D
$$22$$

E
$$52$$

Solution

Insulin is composed of two peptide chains referred to as the A chain and B chain. A and B chains are linked together by two disulfide bonds, and an additional disulfide is formed within the A chain. In most species, the A chain consists of 21 amino acids and the B chain of 30 amino acids.

$$51-amino$$ acids are present in insulin.
Question 10
1 / -0

Enzyme was first isolated by

A
Kuhne

B
Sumner

C
Payer and Persoz

D
Buchner

Solution

Diastase was the first enzyme discovered. It was extracted from malt solution in 1833 by Anselme Payen and Jean Francois Persoz, chemists at a French sugar factory. The name diastase comes from Greek word diastasis it means parting and separation.
So the correct answer 'Payer and Persoz'.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 80

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Biomolecules Test - 80

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Rank

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SHARING IS CARING

Question 1

bone growth

cell division

protein synthesis

all of the above

Solution

Question 2

Kuhne

Buchner

Sumner

Altman et al

Solution

Question 3

adenine

guanine

purine

thymine

uracil

Solution

Question 4

Stomach

Mouth

Intestine

All the above

Question 5

Two types

Three types

Four types

One type

Solution

Question 6

Primary structure

Secondary structure

Tertiary structure

Quaternary structure

Solution

Question 7

Sucrose

Raffinose

Maltose

Galactose

Solution

Question 8

$$\beta - D - 2 -$$ deoxyribose

$$\beta - D -$$ galactose

$$\beta - D -$$ fructofuranose

$$\beta - D -$$ ribose

$$\beta - D -3-$$ ribose

Solution

Question 9

$$25$$

$$51$$

$$20$$

$$22$$

$$52$$

Solution

Question 10

Kuhne

Sumner

Payer and Persoz

Buchner

Solution

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