OnlineCBT
Biology · PYQ NEET UG 2022
हिन्दीRead the following statements and choose the set of correct statements:\ni. Euchromatin is loosely packed chromatin ii. Heterochromatin is transcriptionally active iii. Histone octomer is wrapped by negatively charged DNA in nucleosome iv. Histone are rich in lysine and arginine v. A typical nucleosome contains 400 bp of DNA helix Choose the correct answer from the options given below:
Correct answer · Option 4
i, iii, iv Only
Explanation
Euchromatin is loosely packed and transcriptionally active (statement i correct, ii incorrect). Histone octamer is wrapped by negatively charged DNA (iii correct). Histones are rich in basic amino acids lysine and arginine (iv correct). A typical nucleosome contains 200 bp of DNA (v incorrect). Thus i, iii, iv are correct.
