Describe the structure of DNA molecule as proposed by Watson and Crick

1.	Describe the structure of DNA molecule as proposed by Watson and Crick.
Answer» 1. According to Watson and Crick, DNA molecule consists of two strands twisted around each other in the form of a double helix. 2. The two strands i.e. polynucleotide chains are supposed to be in opposite direction so end of one chain having 3′ lies beside the 5′ end of the other. 3. One turn of the double helix of the DNA measures about 34A. 4. It consists paired nucleotides and the distance between two neighboring pair nucleotides is 3.4A. 5. The diameter of the DNA molecule has been found be 20A.

Describe the structure of DNA molecule as proposed by Watson and Crick.

Answer»

1. According to Watson and Crick, DNA molecule consists of two strands twisted around each other in the form of a double helix.

2. The two strands i.e. polynucleotide chains are supposed to be in opposite direction so end of one chain having 3′ lies beside the 5′ end of the other.

3. One turn of the double helix of the DNA measures about 34A.

4. It consists paired nucleotides and the distance between two neighboring pair nucleotides is 3.4A.

5. The diameter of the DNA molecule has been found be 20A.

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