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

Concept Questions :-

Solved Problems
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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

Concept Questions :-

Genetic Code: I
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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.

Concept Questions :-

DNA Replication: I
Please attempt this question first.

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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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The energy for the DNA replication comes from

(a)Deoxyribonucleosides triphosphates

(b) Deoxyribonucleotides triphosphates

(c) Deoxyribonucleosides

(d) phosphorylation of ATP

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Which of the following is incorrect for DNA polymerase?

(a)template dependent enzyme

(b)highly efficient enzyme

(c)high degree of accuracy

(d)template independent enzyme

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which of the following purposes are not served by Deoxyribonucleoside triphosphates

(a) act as substrate

(b)act as energy source for replication

(c)act as enzyme cofactors

(d)act same as ATP

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