Match List-I with List-II
| List-I | List-II |
|---|---|
| Structures | Characteristics |
| (A) Heterochromatin | (I) A set of positively charged basic proteins |
| (B) Nucleosomes | (II) Densely packed and inactive genetic material |
| (C) Histones | (III) Transcriptionally active genetic material |
| (D) Euchromatin | (IV) DNA is wrapped around the histone octamer to form this structure |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
(A) Heterochromatin — this matches (II) Densely packed and inactive genetic material. In some regions chromatin is packed tightly and stains dark; the genes there are not transcribed.
(B) Nucleosomes — this matches (IV) DNA is wrapped around the histone octamer to form this structure. Negatively charged DNA winds round the positively charged octamer; each nucleosome holds about 200 bp of DNA.
(C) Histones — this matches (I) A set of positively charged basic proteins. Histones are rich in the basic amino acids lysine and arginine, which carry positive charges.
(D) Euchromatin — this matches (III) Transcriptionally active genetic material. Euchromatin is loosely packed and stains light, so its genes can be transcribed.