In a DNA% of T is 20% then what will be the % of G?
(A)20%
(B)40%
(C)30%
(D)60%

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Role of DNA in heredity was discovered for the first time through experiments involving
(A)Transformation using E.coli
(B)Transduction involving bacteriophage
(C)The use of enzymes protease and nuclease
(D)Transformation using heat killed virulent and living non virulent D.pneumoniae

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In 125 amino acids, sequence of the codon for 25th amino acid is mutated to UAA, then
(A)A polypeptide of 24 amino acids is formed
(B) A polypeptide of 124 amino acids is formed
(C) A polypeptide of 25 amino acids is formed
(D) No polypeptides are formed

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If length of DNA is 1.36 mm , the number of base pair and nucleosomes in it will be
(A)4×10^12 and 2×10^4
(B)4×10^6 and 2×10^10
(C)4×10^6 and 2×10^4
(D) 4×10^6 and 2×10^12

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If a codon consists of 3 bases and there are 5 different nitrogenous bases altogether. How many codons will be there?
(A)61
(B)125
(C)27
(D)64

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If a DNA have 5000 base pair , and amount of adenine is 15% then find out the number of nucleotide of guanine
(A)1750
(B)3500
(C)7000
(D)975

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If 4 types of nitrogenous bases are present in nucleic acid , genetic code pentaplet.
What is the possible number of base substitutions in total codon?
(A)15360
(B)960
(C)1024
(D)256

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A codon consists of three nitrogenous bases and there are four kind of bases in nucleic acid altogether. How many codons will be there?
(A)60
(B)43
(C)34
(D)46

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Once the pattern found after one round of replication was observed, Meselson and Stahl could be confident of which of the following conclusions?
1. Replication is semi-conservative.
2. Replication is not dispersive.
3. Replication is not semi-conservative.
4. Replication is not conservative.

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The main enzyme for DNA replication is

(a)DNA-dependent RNA polymerase

(b) RNA-dependent DNA polymerase

(c) DNA-dependent DNA polymerase

(d) RNA-dependent RNA polymerase

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