Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

(i) Chromatin: Chromosome :: Nucleotide: ________

(ii) Adenine: Thymine :: Cytosine: ________

Part (i)

Chromosome:

1. Chromosome is the condensed form of the chromatin formed during the prophase stage of cell division.
2. Chromosome represents a part of the genetic material
3. Chromosome is made up of two sister chromatids.

DNA:

1. DNA is the hereditary material of the cell.
2. Nucleotides are the fundamental unit of DNA.
3. Nucleotide comprises a nitrogen base, a sugar molecule, and a phosphate radical.
4. There are four types of nitrogen bases found in the DNA - adenine, guanine, cytosine, and thymine.

Chromatin: Chromosome :: Nucleotide: DNA

Part (ii)

Thymine and Adenine:

1. Adenine and thymine are complementary bases found on the antiparallel strands of the DNA.
2. Adenine and thymine are linked by two hydrogen bonds.

Cytosine and Guanine:

1. Cytosine and guanine are the other two complementary bases of the DNA molecule.
2. Cytosine and guanine are linked by three hydrogen bonds.

Adenine: Thymine :: Cytosine: Guanine