A. How can nucleosome core particles be isolated from chromatin?
B. What molecular components were identified after this treatment was complete?
C.
What portion of the nucleosome was destroyed/removed during this treatment and what function does it normally serve?
A. In a test tube, the nucleosome core particle can be released from chromatin by treatment with a nuclease that degrades the exposed, linker DNA, but not the DNA wrapped around the nucleosome core.
B. The core nucleosome was revealed to contain two molecules of the histones H2A, H2B, H3, and H4, as well as a 147-base-pair (bp) fragment of DNA.
C. Nuclease treatment degrades linker DNA, whichcan be up to 80 bp in length. This region of DNA is typically bound to linker histones (H1), which are involved in higher-level packing of the chromatin.
You might also like to view...
When copies of a gene are found at different locations on the same or different chromosomes, the phenomenon is
called _____.
a. dispersed duplication b. dispersed localization c. duplicate localization d. gene dispersion e. random dispersion
Discuss how protists can be distinguished from each of the following: bacteria, fungi, plants, and animals
What will be an ideal response?
When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane, the resulting form is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
During previous flu seasons, small variations in the influenza virus resulted in the immune system's inability to full recognize and respond to flu exposure. As a result, the vaccine was less than 30% effective. This is an example of ________.
A. the founder effect B. antigenic shift C. antigenic drift D. artificial selection