BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Double helix, as related to genomics, is a term used to describe the physical structure of DNA. A DNA molecule is made up of two linked strands that wind around each other to resemble a twisted ladder in a helix-like shape. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

Detailed explanation-2: -Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs. Duplication of the genetic information occurs by the use of one DNA strand as a template for formation of a complementary strand.

Detailed explanation-3: -The structure of DNA is referred to as a double helix as it resembles a twisted staircase. A molecule of the DNA comprises two strands wound around each other as though a twisted ladder where each strand comprises a backbone comprising alternating groups of phosphate and sugar groups.

Detailed explanation-4: -Answer: The right answer to the given question is option A) A double helix. It best describes the structure of a DNA molecule. Moreover, the DNA is not a single stranded and it does not comprise amino acids.

Detailed explanation-5: -Option (d) The two strands having complementary base pairing have the same helical geometry but have opposite polarity. This is because the strands are held together are antiparallel in nature.