Molecular Basis of Inheritance: MCQs Quiz – 6 17


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Questions on Molecular Basis of Inheritances: Solve online MCQs test on ‘Molecular basis of Inheritance‘ with answers and reporting. Test # 06

Molecular Basis of Inheritance: MCQs Quiz - 6

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Question 1
PCR and Restriction Fragment Length Polymorphism are the methods for
A
DNA sequencing
B
Genetic fingerprinting
C
Study of enzymes
D
Genetic transformation
Question 2
Removal of RNA polymerase III from nucleoplasm will affect the synthesis of
A
mRNA
B
rRNA
C
tRNA
D
hnRNA
Question 3
Removal of introns and joining of exons in a defined order during transcription is called
A
Slicing
B
Splicing
C
Looping
D
Inducing
Question 4
Which one of the following is not a part of a transcription unit in DNA?
A
A promoter
B
The structural gene
C
The inducer
D
A terminator
Question 5
A single strand of nucleic acid tagged with a radioactive molecule is called
A
Plasmid
B
Probe
C
Vector
D
Selectable marker
Question 6
If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?
A
AACTG
B
ATCGU
C
TTAGU
D
UAGAC
Question 7
Degeneracy of genetic code is due to
A
functional 61 codons and 20 amino acids
B
functional 64 codons and 20 amino acids
C
functional 20 codons and 20 amino acids
D
functional 20 codons and 61 amino acids
Question 8
Why are UGA, UAG and UAA called termination codons?
A
They do not specify any amino acid
B
They are present at the beginning of mRNA
C
They terminate anticodons
D
They indicate initiation of translation
Question 9
During replication of DNA,Okazakifragments are formed in the direction of :
A
3′→5′
B
5′→3′
C
5′→5′
D
3′→3′
Question 10
Link together two pieces of DNA
A
Link together two pieces of DNA
B
Cut DNA at specific locations
C
Restrict elongation of DNA
D
Restrict DNA replication
Question 11
In the DNA molecule:
A
The proportion of Adenine in relation to thymine varies with the organism
B
There are two strands which run parallel in the 5′ → 3′ direction
C
There are two strands which run antiparallel-one in 5′ → 3′ direction and other in 3′ → 5′
D
The total amount of purine nucleotides and pyrimidine nucleotides is not always equal
Question 12
What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA
A
A polypeptide of 24 amino acids will be formed
B
A polypeptide of 25 amino acids will be formed
C
A polypeptide of 49 amino acids will be formed
D
Two polypeptides of 24 and 25 amino acids will be formed
Question 13
Number of nitrogenous bases in a Codon is
A
3
B
2
C
1
D
5
Question 14
A gene of operon which synthesizes a repressor protein is ______.
A
Promoter gene
B
Regulator gene
C
Operator gene
D
Structural gene
Question 15

The sequence of events mentioned below are symbolized by alphabets. Choose the correct answer where the alphabets are matched with the processes. <.p>

RNA —(A)—> DNA —(B)—> DNA —(C)—> mRNA —(D)—> Polypeptide

A
A = Replication, B = Transformation, C = Transcription, D = Translation
B
A = Reverse transcription, B = Translation, C = Transcription, D = Replication
C
A = Replication, B = Transcription, C = Translation, D = Transduction
D
A = Reverse transcription, B = Replication, C = Transcription, D = Translation
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17 thoughts on “Molecular Basis of Inheritance: MCQs Quiz – 6

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