Important Questions of Molecular Basis of Inheritance Biology | Zigya

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51.

Removal of introns and joining the exons in a defined order in transcription unit is called

  • splicing

  • tailing

  • transformation

  • transformation

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52.

Whose experiments cracked the DNA  and discovered unequivocally that is genetic code is a triplet?

  • Nirenberg and Mathaei

  • Hershey and Chase

  • Morgan and Sturtevant

  • Morgan and Sturtevant

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53.

select the incorrect statement from the following 

  • Linkage is an exception to the principle of independent assortment in heredity

  • galactosemia is an inborn error of metabolism

  • small population size results in a random genetic drift in a population

  • small population size results in a random genetic drift in a population

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54.

Semiconservative replication of DNA was first demonstrated in

  • Drosophila melanogaster

  • Escherichia Coli

  • Streptococcus pneumoniae

  • Streptococcus pneumoniae

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55.

Transgenic plants are

  • produced by a somatic embryo in an artificial medium

  • generated by introducing foreign DNA into a cell and regenerating a plant from that cell

  • Produced by protoplast fusion in the artificial medium

  • Produced by protoplast fusion in the artificial medium

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56.

What is not true for genetic code?

  • A condon in mRNA is read in a non-contiguous fashion

  • It is nearly universal 

  • It is degenerate

  • It is degenerate

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57.

Given below is the diagram of a bacteriophage in which one of the options, all the four parts A, B, C and D are correct?


  • A

    B

    C

    D

    Tail fibres

    Head

    Sheath

    Collar

  • A

    B

    C

    D

    Sheath

    Collar

    Head

    Tail fibres

  • A

    B

    C

    D

    Head

    Collar

    Sheath

    Tail fibres

  • A

    B

    C

    D

    Head

    Collar

    Sheath

    Tail fibres

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58.

Gel electrophoresis is used for 

  • cutting of DNA into fragments

  • separation of DNA fragments according to their size

  • construction of recombinant DNA by joining with cloning vectors

  • construction of recombinant DNA by joining with cloning vectors

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59.

Polymase is formed by

  • several ribosomes attached to a single mRNA

  • many ribosomes attached to a strand of endoplasmic reticulum

  • a ribosome with several subunits

  • a ribosome with several subunits

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60.

In the DNA molecule

  • the  total amount of purine nucleotides and pyrimidine nucleotides is not always equal

  • there are two strands, which run parallel in the 5' →3' direction

  • the proportion of adenine in relation to thymine varies with organism

  • the proportion of adenine in relation to thymine varies with organism

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