Question

Describe and compare the various forms of DNA and explain the bonds that hold the (5)
double helix of the DNA together.

Answer 1

Question #61105, Chemistry, Other

Describe and compare the various forms of DNA and explain the bonds that hold the (5) double helix of the DNA together.

Answer:

DNA is a molecule that carries genetic instructions, used in the growth, development, functioning and reproduction of all known living organisms and many viruses.

Three major forms of DNA are double stranded and connected by interactions between complementary base pairs. These are terms A-form, B-form, and Z-form DNA.

The main differences between those DNA forms are described in the table 1:

Table 1 - Main features of the DNA forms

The DNA double helix is held together by two types of bonds, covalent and hydrogen. Covalent bonds occur within each linear strand and strongly bond the bases, sugars, and phosphate groups (both within each component and between components). Hydrogen bonds occur between the two strands and involve a base from one strand with a base from the second in complementary pairing. These hydrogen bonds are individually weak but collectively quite strong.

http://www.AssignmentExpert.com