LIFE SCIENCE

Detailed explanation-1: -A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.

Detailed explanation-2: -DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands.

Detailed explanation-3: -They carry the genetic blueprint of a cell in the form of deoxyribonucleic acid (DNA) and the instructions for the function of the cell in the form of ribonucleic acid (RNA). Chromosomes are composed of DNA arranged into genes and other non-coding areas.

Detailed explanation-4: -RNA (Ribonucleic acid) is synthesized in the nucleus and is located predominantly in the cell cytoplasm. It is a polymeric molecule important for the coding, decoding, control, and expression of genes in different biological roles. Therefore, chromosomes do not consist of RNA.

Detailed explanation-5: -One chromosome is made of two chromatids and each chromatid is a DNA molecule. Each DNA molecule is a double helix. So two DNA molecules per chromosome.