Refer to the given figure and select the correct option regarding its parts labelled as A, B and C.

(1) A-Histone octamer, C-DNA

(2) B-H1 histone, C-Histone octamer

(3) A-H1 histone, B-DNA

(4) A-Histone octamer, C-H1 histone

Subtopic:  DNA Packaging |
 91%
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Match the triplet codons listed in column I with their amino acids mentioned in column II and select the correct option from the given codes.

  Column I

   Column II

A. GGG

(i) Proline

B. UUU

(ii) Glycine

C. CCC

(iii) Arginine

D. AAA

(iv) Phenylalanine

 

(v) Lysine

(1) A-(v), B-(iii), C-(i), D-(ii)

(2) A-(v), B-(iii), C-(i), D-(iv)

(3) A-(ii), B-(iv), C-(i), D-(v)

(4) A-(i), B-(ii), C-(iii), D-(iv)

Subtopic:  Genetic Code: I | Genetic Code |
 86%
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Match the following column

Column I

Column II

I. Multigenes

(i) transposons

II. Inducible genes

(ii) insulin

III. Overlapping genes

(iii) B, E and k in ϕ × 174

IV. Structural genes

(iv) snRNA

 

(v) globin gene

 

(vi) nitrate reductase

 

I

II

III

IV

(1)

(i)

(iii)

(v)

(ii)

(2)

(v)

(vi)

(iii)

(ii)

(3)

(iv)

(v)

(vi)

(i)

(4)

(i)

(ii)

(v)

(vi)

 

Subtopic:  Gene Regulation: Introduction |
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The premature termination of polypeptide synthesis due to stop codon can be overcome via compensatory mutation in tRNA. This genetic phenomenon is called

(1) extragenic suppression

(2) intragenic suppression

(3) codon bias

(4) true reversion

Subtopic:  Translation Mechanism |
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Suppose, evolution on earth had occurred in such a way that there are 96 amino acids instead of 20. DNA has 12 different types of bases and DNA synthesis occurs in the same way as today. The minimum number of bases per DNA codon would be

(1) 12

(2) 8

(3) 2

(4) 3

Subtopic:  The DNA | Genetic Code: I | Genetic Code |
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Radioactive thymidene is fed to cells about to enter S-phase. It will make radioactive

(1) euchromatin

(2) heterochromatin

(3) Both (1) and (2)

(4) neither euchromatin nor heterochromatin

 58%
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What would happen, if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA?

(1) A polypeptide of 49 amino acids will be formed

(2) A polypeptide of 25 amino acids will be formed

(3) A polypeptide of 24 amino acids will be formed

(4) Two polypeptides of 24 and 25 amino acids will be formed

Subtopic:  Genetic Code: III | Translation | Genetic Code |
 71%
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Which one of the following set meaning is not different?

(1) Cistron

Triplet

(2) DNA profile

DNA type

(3) Gene pool

Genome

(4) Gene

Codon

 

Subtopic:  DNA Fingerprinting |
 61%
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Okazaki is known for his contribution to the understanding of

(1) transcription

(2) translation

(3) DNA replication

(4) mutation

Subtopic:  DNA Replication:III | DNA Replication |
 79%
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The beginning of understanding genetic transformation in bacteria was made by

(1) Frederick Griffith

(2) Hershey and Chase

(3) Watson and Crick

(4) TH Morgan

Subtopic:  Search for Genetic Material:I | Search for Genetic Material |
 88%
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