Fill in the blanks:

1. Chromatin fibre is made up of DNA and …………… .
2. The two sister chromatids of a chromosome are attached to each other at …………… .
3. The structure of DNA was first discovered by…………… .
4. The three components of a nucleotide are …………… and …………… .
5. DNA strand wound around a histone octamer forms a complex called a …………… .
6. A specific sequence of nucleotides on a chromosome constitutes a …………… .

1. Chromatin fibre is made up of DNA and Histones .
2. The two sister chromatids of a chromosome are attached to each other at centromere .
3. The structure of DNA was first discovered by Rosalind Franklin .
4. The three components of a nucleotide are phosphate, sugar and nitrogenous base .
5. DNA strand wound around a histone octamer forms a complex called a nucleosome .
6. A specific sequence of nucleotides on a chromosome constitutes a gene .