Chemical basis of heredity is?
DNA
RNA
Histones
None
Related Questions
Ultimate unit of DNA is
Nucleotide
Nucleosome
Nucleoside
Polynucleotide
One of the nucleotides of DNA is
Adenine
Deoxyadenylic acid
Adenosine
Deoxyuridine phosphate
Number of base pairs of DNA helix in a typical nucleosome?
200
100
500
2000
The diameter of Z-DNA is
34Å
20Å
18Å
45Å
In a double helix of DNA molecule of 10 coils, if there are 30 adenine nitrogen bases, what is the number of guanine nitrogen bases?
30
70
140
170
The bond that links adjacent nucleotides in a DNA strand is called a:
Peptide bond
Glycosidic bond
Hydrogen bond
Phosphodiester bond
Which one of the following statements is incorrect about the properties of DNA?
DNA exists as a double helix.
The backbone of DNA is composed of sugar and phosphate.
Uracil is a base found in DNA.
Adenine pairs with thymine, and guanine pairs with cytosine.
One turn of the helix in a B-form DNA is approximately
20 nm
0.34 nm
3.4 nm
2 nm
If the total number of base pairs in a human DNA is bp and each base pair extends for nm, what would be the approximate length of the DNA if it were stretched out?
2.2 m
0.22 m
22 m
220 m
The length of DNA having 23 base pairs is
78Å
78.4Å
74.8Å
78.2Å
