alleryStart learning →Wrapping DNA around cores of histone proteins is the first level of packing. How much does it shorten the molecule?
AAbout seven times shorter
BAbout fifty times shorter
CAbout two times shorter
DAbout ten times shorter
Answer & Solution
Correct answer: A. About seven times shorter
1. Short stretches of the double helix wrap around a core of eight histone proteins.
2. Each bead of DNA plus histones is a nucleosome, and the DNA between beads is linker DNA.
3. In this beads on a string form the molecule is about seven times shorter than the bare helix.
4. Fifty times shorter belongs to the next level of packing, once the nucleosomes coil further.
_Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 10.1 Cell Division_
Keep practising Cell Reproduction
Browse all Cell Reproduction questions for STAAR EOC Biology, or explore more Biology topics.
Related questions
Flip to pair regulator with jobTap the five stages in orderMerge the cell count up to eightHow is bacterial DNA packaged compared with the DNA of a eukaryote?Which protein forms the ring that pinches a dividing bacterium in two?Which step of eukaryotic cell division is absent from bacterial binary fission?A cell has DNA damage that its repair enzymes cannot fix. What can p53 do next?Retinoblastoma protein binds the transcription factor E2F. What does that binding stop?