Molecular Basis of Inheritance Test

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Molecular Basis of Inheritance Test - 62

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Weekly Quiz Competition

Question 1
1 / -0

Functional unit of gene that specifies synthesis of one polypeptide is

A
Codon

B
Cistron

C
Recon

D
Muton
Question 2
1 / -0

In operon model, RNA polymerase binds to

A
Structural gene

B
Promoter gene

C
Regulator

D
Operator gene
Question 3
1 / -0

What is true of Watson and Cricks model of DNA. It is duplex with ______.

A
10 base pairs and 34$$A^\circ$$ distance for every turn

B
10 base pairs and 3.4$$A^\circ$$ distance for each turn of spiral

C
20 base pairs and 34$$A^\circ$$ for each turn

D
10 base pairs and 34 nm distance for every turn
Question 4
1 / -0

In a DNA molecule cytosine is 18%. Percentage of adenine would be _________.

A
32%

B
64%

C
36%

D
18%

Solution

The answer is option A i.e "32%".
According to Chargraff's rule, Number of purine (adenine+guanine) = Number of pyrimidine (cytosine+thymine).
Hence, the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
As per the data given above, we can infer that, the percentage of G = the percentage of C = 18%.
Now, total percentage of total A and T = 100 - 18 - 18 = 64, so the percentage of A is 64/2 = 32%.
Question 5
1 / -0

The number of base substitution possible in amino acid codons is

A
261

B
264

C
535

D
549

Solution

There are 61 codons for amino acids. Each codon has 3 bases, each of which can undergo transition and transversion substitution, 61 x 3$$^2$$ = 549.
So, the correct answer is '549'.
Question 6
1 / -0

Double Hydrogen bonds occur in DNA between ___ and ___.

A
Adenine and Thymine

B
Uracil and Thymine

C
Adenine and Guanine

D
Thymine and Cytosine
Question 7
1 / -0

Okazaki segments are formed during

A
Transduction

B
Transcription

C
Replication

D
Translation
Question 8
1 / -0

tRNA recognises ribosome by ____________.

A
TC loop

B
DHU loop

C
Anticodon

D
AA-site
Question 9
1 / -0

Enzyme required for removing RNA primer during DNA replication is ______________.

A
Primase

B
DNA polymerase I

C
DNA polymerase III

D
Ligase
Question 10
1 / -0

Which one is involved in DNA repair ?

A
Ligase

B
Primase

C
DNA polymerase III

D
DNA polymerase I

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Molecular Basis of Inheritance Test - 62

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Molecular Basis of Inheritance Test - 62

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SHARING IS CARING

Question 1

Codon

Cistron

Recon

Muton

Question 2

Structural gene

Promoter gene

Regulator

Operator gene

Question 3

10 base pairs and 34$$A^\circ$$ distance for every turn

10 base pairs and 3.4$$A^\circ$$ distance for each turn of spiral

20 base pairs and 34$$A^\circ$$ for each turn

10 base pairs and 34 nm distance for every turn

Question 4

32%

64%

36%

18%

Solution

Question 5

261

264

535

549

Solution

Question 6

Adenine and Thymine

Uracil and Thymine

Adenine and Guanine

Thymine and Cytosine

Question 7

Transduction

Transcription

Replication

Translation

Question 8

TC loop

DHU loop

Anticodon

AA-site

Question 9

Primase

DNA polymerase I

DNA polymerase III

Ligase

Question 10

Ligase

Primase

DNA polymerase III

DNA polymerase I

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