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Molecular Basis...

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  • Question 1
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    The double helical model of the DNA was proposed by Watson and Crick based on that what data produced by Wilkins and Franklin?

  • Question 2
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    Which of the following is not relevant to the structure of double helical DNA?

  • Question 3
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    Which one of the following group of codons is called as degenerate codons?

  • Question 4
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    Which one of the following is correct?

  • Question 5
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    Which enzyme catalyzes the separation of DNA strands during DNA replication?

  • Question 6
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    Identify the correct and incorrect statements.
    A.  The four nucleotide bases are not necessarily present in DNA in exact equal proportions.
    B.  The total amount of purines are equal to the total amount of pyrimidines.
    C.  DNA ligase enzyme act to hydrolyse or breakdown a polynucleotide chain into its component nucleotides.
    D. Nuclease enzymes are capable of restoring an intact DNA duplex.

  • Question 7
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    The base sequence for a nucleic acid segment is given CAG, AGG, CGA, CCA. From this, it can definitely be concluded that it is a segment of which strand?

  • Question 8
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    In a given DNA segment, the number of nucleotides of guanine is 75 and those of thymine is 75. What will be the total number of nucleotides in the segment?

  • Question 9
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    In prokaryotes, the process of replication is catalysed by the following enzymes. Identify which of the enzymes is best coordinated with the role?

  • Question 10
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    How many effective codons are there for the synthesis of twenty amino acids?

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