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Write a Short Note on Features of Dna. - Biology

Short Note
Write a short note on features of DNA.
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Solution

Features of DNA:
(a) DNA consists of two strands which are spirally arranged around an axis. This is called a double helical arrangement.
(b) Each DNA strand is made up of nitrogenous bases, pentose sugar and phosphate.
(c) Sugars are pentose type; bases are adenine, guanine, cytosine and thymine.
(d) Both strands are connected with hydrogen bonds. There are two bonds between adenine and thymine and three bonds between guanine and cytosine.
(e) In the DNA, bases are inside and sugars are outside and two sugars are connected with phosphoric acid.
(f) Each DNA strand replicates and from each replicated DNA a new DNA is formed. This is called replication of DNA.

Concept: Deoxyribonucleic Acid (DNA) and Its Structure
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APPEARS IN

Frank ICSE Class 10 Biology
Chapter 2 Structure of Chromosomes
Exercise | Q 18 | Page 20
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