The somatic chromosome complement in all human being is

  • A

    $21$ pairs of autosomes and one pair heterosomes

  • B

    $23$ pairs of autosomes and one pair of heterosomes

  • C

    $22$ pairs of autosomes and one pair of heterosomes

  • D

    $22$ pairs of autosomes and one pair of $XY$ chromosomes

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Column - $I$ Column - $II$
$(a)$ Helicase $(1)$ Joining of nucleotides
$(b)$ Gyrase $(2)$ Opening of DNA
$(c)$ Primase $(3)$ Unwinding of DNA
$(d)$ DNA Polymerase III $(4)$ RNA Priming

 

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In a mutational event, when adenine is replaced by guanine, it is a case of

  • [AIPMT 2004]