Gene its Nature Expression and Regulation Quiz | Gene its Nature Expression and Regulation Objective Type Questions and Answers

Questions
21 Segments ofmRNA removed during splicing are
A Integrator visions
B Exons
C Introns
D Promoter regions

Answer: Introns
22 The essential components of Eukaryotic cistron are
A Exons
B Operator and regulator regions
C Introns
D Operons

Answer: Exons
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

Answer: Aporepressor
25 Tryptophan Operon of escherichia coli is
A Unregulated
B Repressible
C Monocistronic
D Inducible

Answer: Unregulated
26 Part of Operon producing repressor is known as
A Regulator gene
B Promoter gene
C Repressor gene
D Operator gene

Answer: Regulator gene
27 Regulated unit of genetic material is termed as
A Operator gene
B Okazaki segment
C Operon
D Regulator gene

Answer: Operon
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

Answer: Structural 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

Answer: Beadle and Tatum
31 Beadle and Tatum produced mutant strain of neurospora by
A Gamma rays
B Beta rays
C X rays
D UV rays

Answer: X rays
32 The terms triplet code and genetic code where coined by
A Gamow
B Conrat
C Watson and Crick
D Nirenberg

Answer: Gamow
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

Answer: Auxotroph
34 One gene one enzyme hypothesis was proposed by
A Beadle and Tatum
B Bridges
C Khurana and nirenberg
D Bateson and punnet

Answer: Beadle and Tatum
35 Genetic information is carried out by long chain molecule made up of
A Nucleotides
B Histone proteins
C Amino acids
D Enzymes

Answer: Nucleotides
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

Answer: Beadle and Tatum
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

Answer: tRNA
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

Answer: Both DNA and RNA
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