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Free download in PDF Gene its Nature Expression and Regulation Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
Segments ofmRNA removed during splicing are
[A]
Integrator visions
[B]
Exons
[C]
Introns
[D]
Promoter regions
(22)
The essential components of Eukaryotic cistron are
[A]
Exons
[B]
Operator and regulator regions
[C]
Introns
[D]
Operons
(23)
External supply of tryptophan in escherichia coli brings about
[A]
Switching on of Lac Operon
[B]
Switching on of tryptophan Operon
[C]
Switching off of tryptophan Operon
[D]
Switching off of Lac Operon
Answer: Switching off of tryptophan Operon
(24)
Corepressorbinds with
[A]
Aporepressor
[B]
Regulator gene
[C]
Promoter gene
[D]
Operator gene
(25)
Tryptophan Operon of escherichia coli is
[A]
Unregulated
[B]
Repressible
[C]
Monocistronic
[D]
Inducible
(26)
Part of Operon producing repressor is known as
[A]
Regulator gene
[B]
Promoter gene
[C]
Repressor gene
[D]
Operator gene
(27)
Regulated unit of genetic material is termed as
[A]
Operator gene
[B]
Okazaki segment
[C]
Operon
[D]
Regulator gene
(28)
Components of an Operon are
[A]
Regulator, promoter, operator and structural genes
[B]
Regulator, promoter and structural genes
[C]
Operator, promoter and regulator genes
[D]
Operator, regulator and structural genes
Answer: Regulator, promoter, operator and structural genes
(29)
Agene that takes part in the synthesis of polypeptide is
[A]
Structural gene
[B]
Promoter gene
[C]
Regulator gene
[D]
Operator gene
(30)
The technique of detecting and screening of nutritional Mutants in neurospora crassa was developed by
[A]
Beadle and Tatum
[B]
Bateson and punnett
[C]
Mendel
[D]
Morgan
31
Beadle and Tatum produced mutant strain of neurospora by
[A]
Gamma rays
[B]
Beta rays
[C]
X rays
[D]
UV rays
32
The terms triplet code and genetic code where coined by
[A]
Gamow
[B]
Conrat
[C]
Watson and Crick
[D]
Nirenberg
33
A mutant strain of neurospora which fails to grow on a minimal medium unless supplemented with a nutrient is called
[A]
Prototroph
[B]
Auxotroph
[C]
Heterotrophs
[D]
Autotrophs
34
One gene one enzyme hypothesis was proposed by
[A]
Beadle and Tatum
[B]
Bridges
[C]
Khurana and nirenberg
[D]
Bateson and punnet
35
Genetic information is carried out by long chain molecule made up of
[A]
Nucleotides
[B]
Histone proteins
[C]
Amino acids
[D]
Enzymes
36
For their contribution in biochemical Genetics the scientist who received Nobel Prize in 1958 were
[A]
Zinder and Morgan
[B]
Beadle and lederberg
[C]
Beadle and Tatum
[D]
Leaderberg and Zinder
37
Blender experiment to prove DNA as genetic material was performed by
[A]
Rosalind Franklin
[B]
Watson and Crick
[C]
Hershey and chase
[D]
Meselson and stahl
Answer: Hershey and chase
38
In polypeptide synthesis amino acids are brought over ribosomes mRNA Complex by
[A]
tRNA
[B]
DNA
[C]
rRNA
[D]
Nucleotides
39
Code transfer for synthesis of polypeptide involves
[A]
DNA,mRNA,tRNA and amino acids
[B]
tRNA,DNA,nRNA and rRNA
[C]
DNA, tRNA, or RNA andmRNA
[D]
mRNA,tRNA,rRNA and DNA
Answer: DNA,mRNA,tRNA and amino acids
40
DNA acts as a template for synthesis of
[A]
RNA
[B]
DNA
[C]
Both DNA and RNA
[D]
Protein
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