Molecular Basis of Inheritance: MCQs Quiz – 4 4


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Molecular Basis of Inheritance Questions: Solve online MCQs test on ‘Molecular basis of Inheritance‘ with instant answers and reporting. Test # 04

Molecular Basis of Inheritance: MCQs Quiz - 4

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Question 1
During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?
A
TATA
B
TTAA
C
AATT
D
CACC
Question 2
During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be
A
TCTGG
B
UAUGC
C
UATGC
D
TATGC
Question 3
During protein synthesis, AUG functions as the initiator codon in mRNA. What should be the anticodon on the tRNA molecule that picks up and brings the amino acid specified by this codon?
A
TAC
B
UAC
C
GUA
D
CAU
Question 4
Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?
A
UUA-Valine
B
AAA-Lysine
C
AUG-Cysteine
D
CCC-Alanine
Question 5
According to the lac-operon concept, which functional unit of the bacterial gene material is responsible for suppressing the activity of the operator gene in the absence of lactose?
A
Promoter gene
B
Repressor protein
C
Regulator gene
D
Structural gene
Question 6
In a DNA strand the nucleotides are held together by:
A
Peptide bonds
B
Phosphodiester bonds
C
Glycosidic bonds
D
Hydrogen bonds
Question 7
The reaction, Amino acid + ATP → Aminoacyl-AMP + P–P depicts
A
Amino acid assimilation
B
Amino acid transformation
C
Amino acid activation
D
Amino acid translocation
Question 8
mRNA directs the building of proteins through a sequence of
A
Introns
B
Codons
C
Exons
D
Anticodons
Question 9
Enzyme responsible for reverse transcription is :
A
Reverse transcriptase
B
DNA polymerase
C
RNA polymerase
D
RNA dependent RNA polymerase
Question 10
DNA has equal number of adenine and thymine residues (A = T) and equal number of guanine and cytosine (G = C). These relationships are known as
A
Chargaff's rule
B
Coulomb's law
C
Le-Chatelier's principle
D
Van't Hoff plot
Question 11
Central dogma of protein synthesis is
A
DNA → RNA → Protein
B
DNA → DNA → Protein
C
RNA → DNA → Protein
D
DNA → protein → RNA
Question 12
There are 64 codons in the genetic dictionary as
A
There are 64 amino acids to be coded
B
Genetic code has a triplet nature
C
There are 3 nonsense codons and 61 sense codons
D
There are 64 different types of t-RNA
Question 13
Which one of the following does not follow the central dogma of molecular biology?
A
HIV
B
Pea
C
Mucor
D
Chlamydomonas
Question 14

Select the two correct statements out of the four (a–d) given below about lac operon.

(a) Glucose or galactose may bind with the repressor and inactivate it

(b) In the absence of lactose the repressor binds with the operator region

(c) The z-gene codes for permease

(d) This was elucidated by Francois Jacob and Jacque Monod

The correct statement are

A
(a) and (b)
B
(b) and (c)
C
(a) and (c)
D
(b) and (d)
Question 15

Assertion: Amber codon is a termination codon.

Reason: If in a mRNA, a termination codon is present, the protein synthesis stops abruptly whether the protein synthesis is complete or not.

A
Both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B
Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion.
C
Assertion is true, but Reason is false.
D
Both Assertion and Reason are false.
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4 thoughts on “Molecular Basis of Inheritance: MCQs Quiz – 4

  • abipsa

    these tests are of great help… no doubt they are good but still the level of the test needs a little upliftment.
    🙂

  • divya

    well i felt it ws a very easy test…even though i didnt complete half the chapter i got a 11/15…bt yeah this boosts my confidence..thanks anyway

  • muskan arora

    it was not so easy but really helpful to gain knowledge n to try different