What is the structure of centromeric DNA sequences?
What will be an ideal response?
Ans: The centromeres of multicellular eukaryotic chromosomes contain highly repetitive DNA, or satellite DNA, as well as a centromere-specific variant of histone H3. The structure of centromeres appears to be epigenetically determined by chromatin structure rather than genetically determined by DNA sequences. In yeast, there are repetitive centromeric sequences are called CEN elements.
You might also like to view...
Most E. coli antisense RNAs work with a protein called ________ to regulate their target mRNAs.
A. Hfq B. MicF C. CAP D. None of the choices are correct.
The more bacteria one starts with, the longer it will take to kill them all
Indicate whether this statement is true or false.
E. coli has been isolated and cultured from three different individuals. Upon biochemical testing of these three cultures, you find that there are differences in some reactions. What is the best explanation of these differences?
A. These represent three different species of E. coli. B. This is normal genetic variation seen among strains of E. coli. C. The other two cultures are not really E. coli. D. Mistakes have been made in the test interpretation. E. Two of the cultures are mutants of the other.
____ is the process of maintaining a constant
internal environment. a. Hybridization b. Osmostasis c. pH adjustment d. Homeostasis e. None of these