A region of chromatin has recently become DNAse I hypersensitive. Which enzyme has been activated to cause this change in chromatin structure?
A) histone methyltransferase
B) histone acetylase
C) histone deacetylase
D) phosphatase
E) kinase
B
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Kleckner and coworkers discovered a protein bound to the 5' termini of double-stranded breaks
In their effort to purify and identify this protein, what did they do to amplify the signal (enrich the number of covalently bound complexes), and which protein did they ultimately purify? What will be an ideal response?
Which of the following statements about asexual reproduction is TRUE?
a. The offspring are genetically identical to each other. b. The offspring are genetically identical to their parent. c. It is common in vertebrates. d. The offspring are genetically identical to each other and to their parent. e. The offspring are clones of each other but not clones of their parent.
What is the purpose of peptone?
What will be an ideal response?
Beta thalassemia anemia is caused by what type of mutation in the globin gene?
A. Base-pair substitution B. Deletion C. Insertion D. Dimerization E. Promoter interference