Question

Describe the structure of the DNA molecule. Answer the question in your own words.

Answer 1

Deoxyribonucleic acid is a molecule composed of two chains which coil around each other to form a double helix carrying the genetic instructions used in the growth, development, functioning and reproduction .

Answer 2

Dear Student,

◆ Structure of DNA molecule -

• DNA is double helical structure consisting polymer of nucleotides.
• Following type of bonds are involved in formation of DNA strand.
• Components of nucleotide are a phosphate group, a sugar group, a nitrogen base.
• Phosphate group - It's phosphorus atom bound to 4 oxygen atoms.
• Sugar group - This can be either ribose or deoxyribose sugar.
• Nitrogen base - This can be A, G, C, T.
• Two successive nucleotides are joined together by phosphodiester bonds.
• Two strands of DNA are held together by hydrogen bonding.

Thanks dear. Hope this helps you...