BIOMOLECULES AND ENZYMES

Detailed explanation-1: -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.

Detailed explanation-2: -The type of bond that keeps each individual DNA strand together is A. Covalent bonds. Covalent bonds function to form the sugar-phosphate backbone of DNA, and keeps individual strands together. Hydrogen bonds connect each nitrogenous base pair G-C, A-T, found on single strands of DNA.

Detailed explanation-3: -There are three types of bond present in DNA and they are hydrogen bond, Phosphodiester bonds and glycoside bonds, where Phosphodiester bonds exist between the nucleotides, hydrogen bond exists between the nitrogenous base and glycoside bond exists between the pentose sugar molecule and nitrogenous base.

Detailed explanation-4: -For instance, strong covalent bonds hold together the chemical building blocks that make up a strand of DNA. However, weaker hydrogen bonds hold together the two strands of the DNA double helix. These weak bonds keep the DNA stable, but also allow it to be opened up for copying and use by the cell.

Detailed explanation-5: -The backbone of the DNA is made up of phosphodiester bonds and the two strands are connected to each other by hydrogen bonds. There are two hydrogen bonds in A-T base pairing and three hydrogen bonds in G-C base pairing.