NEETZoologyMolecular Basis of Inheritance
Match List I with List II: List I List II A. Euchromatin I. Densely packed and inactive B. Heterochromatin II. Contains 200 bp of DNA helix C. Histones III. Transcriptionally active and stains light D. Nucleosome IV. Rich in basic amino acid residues Choose the correct answer from the options given below:
Options
- AA-I, B-III, C-II, D-IV
- BA-III, B-I, C-II, D-IV
- CA-III, B-I, C-IV, D-II
- DA-I, B-III, C-IV, D-II
Correct answer
C. A-III, B-I, C-IV, D-II
Step-by-step solution
Euchromatin is loosely packed, stains light, and is transcriptionally active chromatin (A matches III). Heterochromatin is densely packed, stains dark, and is transcriptionally inactive (B matches I). Histones are a set of positively charged, basic proteins that are rich in the basic amino acid residues lysine and arginine (C matches IV). A typical nucleosome consists of a histone octamer wrapped by negatively charged DNA, containing 200 bp of DNA helix (D matches II). Therefore, the correct matching is A-III, B-I,