Question

Question: Number of base pairs in the DNA helix around the octamer histone molecule is
A. 140 - 200 bp
B. 100 -150 bp
C. 40 - 67 bp
D. 200 - 260 bp
Solution:

Answer 1

Hint: A typical nucleosome contains two hundred base pairs (bp) of the deoxyribonucleic acid helix whereas somebody's nucleosome contains 146 bp of the deoxyribonucleic acid helix. A nucleosome is the basic structural unit of deoxyribonucleic acid packaging in eukaryotes.
Complete step-by-step solution:
The nucleosome is the basic monetary unit of chromatin granules. Every nucleosome consists of touch but 2 turns of deoxyribonucleic acid wrapped around a group of eight proteins known as histones, that square measure referred to as a simple protein octamer.
The length of deoxyribonucleic acid within the nucleosome repeat unit varies between organisms and even between cell varieties within the same organisms.
The origin of this variation in repeat length, starting from a hundred and sixty to 240 base pairs per nucleosome, is unknown.
A nucleosome is the basic structural unit of deoxyribonucleic acid packaging in eukaryotes.
 It's the core particle that consists of roughly 146 base pairs (bp) of deoxyribonucleic acid.
A single nucleosome consists of one hundred fifty base pairs of deoxyribonucleic acid sequences wrapped around a core of simple proteins.
The beads square measure known as nucleosomes. Every nucleosome is created of deoxyribonucleic acid wrapped around eight simple protein proteins that perform a sort of a spool and square measure known as a simple protein octamer. every simple protein octamer consists of 2 copies of every of the simple proteins H2A, H2B, H3, and H4.
Hence, option A is correct.
Note: Linker deoxyribonucleic acid is around thirty-eight to fifty-three base pairs long. Linker deoxyribonucleic acid and also the fifth simple protein molecule connect the 2 adjacent nucleosomes. Nucleosomes seem as beads and linker deoxyribonucleic acid as strings within the chromatin granule threads.