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Molecular Basis of Inheritance Test - 61

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Molecular Basis of Inheritance Test - 61
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  • Question 1
    1 / -0
    Usual method of DNA replication is
  • Question 2
    1 / -0
    DNA replication in eucaryotes commences
  • Question 3
    1 / -0
    Operon model of gene regulation and organisation of procaryotes was proposed by
  • Question 4
    1 / -0
    The transforming principle of Pneumococcus as found out by Avery, MacLeod and McCarty was
  • Question 5
    1 / -0
    During DNA replication, the strands separate by
    Solution
    DNA helicase is responsible for opening up our DNA to allow for replication as well as the transcription of our DNA. A DNA helicase is an enzyme that functions by melting the hydrogen bonds that hold the DNA into the double helix structure. It is also known as 'Unwindase'.
    So, the correct option is 'unwindase/Helicase'.
  • Question 6
    1 / -0
    Characters are transferred from parents to progeny through
  • Question 7
    1 / -0
    Arrangement of three successive bases in genetic code signifies
  • Question 8
    1 / -0
    DNA replication is
  • Question 9
    1 / -0
    In the genetic dictionary, there are 64 codons as
    Solution
    • There are 20 amino acids and each codon is triplet; it consists of 3 nitrogeneous bases constituting a particular amino acid. 
    • There are 4 nitrogeneous bases ie. AUGC in case of RNA. So, since each codon consists of 3 bases so total possibilities of combination would be 4^3 = 64.
    • Now out of these 64 codons 61 codons code 20 amino acids. It is to be remembered that one amino acid can be coded by one or more codons. 
    • The rest 3 ie. UGA, UAA and UAG are termination codons ie. they don't code for any of the 20 amino acids.
    So, the correct option is 'Genetic code is triplet'.
  • Question 10
    1 / -0
    Experimental material in the study of DNA replication has been
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