You are studying a histone complex that contains an unusually high level of modification with acetyl groups. What can you conclude about the DNA bound to this histone complex?
A) It contains actively transcribed genes.
B) It is most likely heterochromatin.
C) It is most likely telomeric.
D) It is most likely derived from a condensed Barr body.
A) It contains actively transcribed genes.
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How many electron pairs are shared between carbon 2 and 3 in the accompanying figure?
a. one
b. one and a half
c. two
d. three
e. four
Where would you expect to find the carboxyl end?
A) at the exterior surface B) at the cytosol surface C) connected with the loop at H5 and H6 D) between the membrane layers
Epithelial tissues have one free surface or edge known as the ________ surface.
A. basement. B. apical. C. matrix. D. attached.
Michelle has a clone of the DNA of a newly discovered virus. She wants to identify which specific cells of an organ are infected by the virus. What method would be the most useful to answer this question?
A. Sanger sequencing of the clone B. real time PCR C. FISH (fluorescent in situ hybridization) D. restriction fragment analysis E. microinjection of the gene fragment