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Regarding to features of double helix structure of DNA which of the following is wrong

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Important Questions on Molecular Basis of Inheritance

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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 15
In his experiments on the chemistry of DNA, Chargaff estimated the base composition of human sperms and found that adenine constituted 31% and guanine 19%. The quantity of cytosine in the DNA of human somatic cells is likely to be
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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 16

In a given sample of nucleic acid G+A content is not equal to C+T. The indicates that sample is

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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 17
Nucleic acid was artificially synthesized in vitro by-
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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 18
The haploid content of human DNA is
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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 19
Histone proteins are rich in
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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 20
Bacterial DNA is associated with
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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 21
Which was first genetic material?
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Alpha Question Bank for Medical: Biology>Chapter 28 - Molecular Basis of Inheritance>Exercise-2>Q 22
Which RNA occurs abundantly in a cell?