BIOMOLECULES AND ENZYMES

Detailed explanation-1: -D )Explanation: A nucleotide is composed of three units. The pentose sugar (ribose or deoxyribose), a phosphate group and a nitrogenous base (pyrimidine or purine).

Detailed explanation-2: -Definition. A nucleotide is the basic building block of nucleic acids (RNA and DNA). A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T).

Detailed explanation-3: -(NOO-klee-oh-tide) A molecule consisting of a nitrogen-containing base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate group, and a sugar (deoxyribose in DNA; ribose in RNA).

Detailed explanation-4: -Nucleotides are organic molecules composed of a nitrogenous base, a pentose sugar and a phosphate. They serve as monomeric units of the nucleic acid polymers – deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are essential biomolecules within all life-forms on Earth.

Detailed explanation-5: -Adenine is a nitrogenous base represented by the symbol A in DNA and RNA. It is a purine base and contains two nitrogenous rings fused together. The chemical formula for adenine is C5H5N5. Adenine attaches to the sugar molecule in nucleotides through the 1’ carbon on either ribose or deoxyribose.