MCQ Questions for Class 12 Biology Chapter 6 Molecular Basis of Inheritance with Answers Set-B

Molecular Basis of Inheritance Class 12 Biology MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Biology Chapter 6 Molecular Basis of Inheritance with Answers Pdf free download. MCQ Questions for Class 12 Biology with Answers were prepared based on the latest exam pattern. We have Provided Molecular Basis of Inheritance Class 12 Biology MCQs Questions with Answers to help students understand the concept very well.

Class 12 Biology Chapter 6 Quiz

Class 12 Biology Chapter 6 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Biology Chapter 6 Molecular Basis of Inheritance to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Molecular Basis of Inheritance Class 12 Biology MCQ online test

Q1.	Synthesis of DNA from RNA is explained by
	A.central dogma reverse
	B.reverse transcription
	C.feminism
	D.all of these.

Ans: all of these.

Q2.	Histone proteins are
	A.basic, negatively charged
	B.basic, positively charged
	C.acidic, positively charged
	D.acidic, negatively charged

Ans: basic, positively charged

Q3.	The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called
	A.nucleotides
	B.nucleosides
	C.histone octamer
	D.nucleosomes.

Ans: nucleosomes.

Q4.	Find out the wrong statement about heterochromatin,
	A.It is densely packed
	B.It stains dark.
	C.It is transcriptionally active.
	D.It is late replicating.

Ans: It is transcriptionally active.

Q5.	They year 2003 was celebrated as the 50th anniversary of discovery of
	A.transposons by Barbare Me Clintock
	B.structure of DNA by Watson and Crick
	C.Mendel’s laws of inheritance
	D.biotechnology by Kary Muliis.

Ans: structure of DNA by Watson and Crick

Q6.	The process of transofrmation is not affected by which of the following enzymes ? A. DNase B. RNase C. Peptidase D. Lipase
	A.A, B
	B.A, B, C, D
	C.B, C, D
	D.A, B, C

Ans: B, C, D

Q7.	The three codons which result in the termination of polypeptide chain synthesis are
	A.UAA, UAG, GUA
	B.UAA, UAG, UGA
	C.UAA, UGA, UUA
	D.UGU,UAG,UGA

Ans: UAA, UAG, UGA

Q8.	Amino acids which are specified by single codons are
	A.phenylalanine and arginine
	B.tryptophan and methionine
	C.valine and proline
	D.methionine and aroinine.

Ans: tryptophan and methionine

Q9.	Which out of the following statements is incorrect ?
	A.Genetic code is ambiguous.
	B.Genetic code is deqenerate.
	C.Genetic code is universal.
	D.Genetic code is non-overlanning.

Ans: Genetic code is ambiguous.

Q10.	Some amino acids are coded by more than one codon, hence the genetic code is
	A.overlapping
	B.degenerate
	C.wobbled
	D.unambiguous.

Ans: unambiguous.

Q11.	The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as
	A.point mutations
	B.lethal mutations
	C.silent mutations
	D.retrogressive mutations.

Ans: point mutations

Q12.	Sickle cell anemia results from a single base substitution in a gene, thus it is an example of
	A.point mutation
	B.frame-shift muttion
	C.silent mutation
	D.both (a) and (b).

Ans: point mutation

Q13.	Select the incorreclty matched pair.
	A.Initation codons – AUG,GUG
	B.Stop codons – UAA, UAG, UGA
	C.Methionine – AUG
	D.Anticodons – mRNA

Ans: Anticodons – mRNA

Q14.	Amino acid acceptor end of tRNA lies at
	A.5’ end
	B.3’ end
	C.T VC loop
	D.DHUloop.

Ans: 3’ end

Q15.	Which RNA carries the amino acids from the amino acid pool to mRnA during protein synthesis ?
	A.rRNA
	B.mRNA
	C./RNA
	D.hnRNA

Ans: /RNA

Q16.	During translation, activated amino acids get linked to tRNA. This process is commonly called as
	A.charging of tRNA
	B.discharging of tRNA
	C.aminoacylation of tRNA
	D.both (a) and (c)

Ans: discharging of/RNA

Q17.	To prove that DNA is the genetic material, which radioactive isotopes were used by Hershey and Chase (1952) in experiments ?
	A.33S and 15N
	B.32P and 35S
	C.32P and 15N
	D.14N and 15N

Ans: 14N and 15N

Q18.	RNA is the genetic material in
	A.prokaryotes
	B.eukaryotes
	C.Tabacco Mosaic Virus (TMV)
	D.E.coli.

Ans: Tabacco Mosaic Virus (TMV)

Q19.	Which one among the following was the first genetic material ?
	A.DNA
	B.RNA
	C.Protein
	D.Nuclein

Ans: RNA

Q20.	Which of the following life processes is evolved around RNA ?
	A.Metabolism
	B.Translation
	C.Splicing
	D.All of these

Ans: Translation

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