Biomolecules Test

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Biomolecules Test - 37

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Weekly Quiz Competition

Question 1
1 / -0

The number of tripeptides possible from three different amino acids is:

A
81

B
27

C
9

D
6

Solution

The number of tripeptides possible from three different amino acids is 27. The protein can have 3$$^3=$$ 27 different tripeptide sequences (by permutations).
Question 2
1 / -0

Assertion: $$\alpha $$ -amino acids are the building blocks of proteins.
Reason: Natural amino acids are mostly $$\alpha $$ -amino acids.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true but R is not correct explanation of A

C
A is true but R is false

D
A is false but R is true

Solution

$$\alpha$$-amino acids are the building blocks of proteins.
Proteins on hydrolysis exclusively give $$\alpha$$-amino acids.
Amino acids can be classified into $$\alpha, \beta, \gamma$$, etc.
Natural amino acids are mostly $$\alpha$$ -amino acids.
Question 3
1 / -0

STATEMENT-1 : Guanine unites with cytosine with three hydrogen bonds.
STATEMENT-2 : Guanine and cytosine are purines while that of thymine is a pyrimidine.

A
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1

B
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1

C
STATEMENT-1 is True, STATEMENT-2 is False

D
STATEMENT-1 is False, STATEMENT-2 is True
Question 4
1 / -0

Ascorbic acid resemble the structure of

A
Vitamin A

B
Glucose

C
Cellulose

D
Vitamin D

Solution

Ascorbic acid resembles the structure of glucose. It is also called a vitamin $$C$$. Its molecular formula is $$C_6H_8O_6$$. This vitamin is derived from glucose, thus its structure resembles glucose.
Question 5
1 / -0

The chemical change in DNA molecule that could lead to synthesis of protein with an altered amino acid sequence is called

A
replication

B
lipid formation

C
cellular membrane

D
mutation

Solution

The chemical change in DNA molecule that could lead to synthesis of protein with an altered amino acid sequence is called mutation. This may have sever biological implications.
Question 6
1 / -0

Molecular formula of Retinol is:

A
$$C_{20}H_{29}OH$$

B
$$C_{17}H_{35}OH$$

C
$$C_{12}H_{25}OH$$

D
$$C_{17}H_{33}OH$$

Solution

Molecular formula of retinol is $$C_{20}H_{29}OH$$.

It is also called as vitamin $$A$$, and is essential for vision, particularly night vision, normal bone and tooth development, reproduction, and the health of skin and mucous membranes.

It also acts as an antioxidant.

Option A is correct
Question 7
1 / -0

The ratio of the number of ketonic groups in cytosine, thymine and uracil is:

A
1: 2 : 2

B
2 : 1 : 2

C
2 : 2 : 1

D
1 : 1 : 1

Solution

As evident from the image, the ratio of the number of ketonic groups in cytosine, thymine and uracil is $$1:2:2$$

Hence, option A is correct.
Question 8
1 / -0

In which of the following ketonic group is absent?

A
Guanine

B
Thymine

C
Adenine

D
Uracil

Solution

In adenine, ketonic group is absent.
Question 9
1 / -0

The functional groups present in cytosine are:

A
Keto and amino

B
Keto only

C
Amino only

D
methyl

Solution

Cytosine contains Keto and amino functional groups.
Question 10
1 / -0

Which of the following statements about RNA is not correct?

A
It has a single strand

B
It does not undergo with the replication of bases

C
It does not contain any pyrimidine base

D
It controls the synthesis of proteins

Solution

Cytosine is a pyrimidine base, and it is present in RNA. Hence, option C is incorrect.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 37

Result

Biomolecules Test - 37

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SHARING IS CARING

Question 1

81

27

9

6

Solution

Question 2

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

A is false but R is true

Solution

Question 3

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is False

STATEMENT-1 is False, STATEMENT-2 is True

Question 4

Vitamin A

Glucose

Cellulose

Vitamin D

Solution

Question 5

replication

lipid formation

cellular membrane

mutation

Solution

Question 6

$$C_{20}H_{29}OH$$

$$C_{17}H_{35}OH$$

$$C_{12}H_{25}OH$$

$$C_{17}H_{33}OH$$

Solution

Question 7

1: 2 : 2

2 : 1 : 2

2 : 2 : 1

1 : 1 : 1

Solution

Question 8

Guanine

Thymine

Adenine

Uracil

Solution

Question 9

Keto and amino

Keto only

Amino only

methyl

Solution

Question 10

It has a single strand

It does not undergo with the replication of bases

It does not contain any pyrimidine base

It controls the synthesis of proteins

Solution

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