Epigenetic changes in gene expression that can lead to cancer by silencing tumor suppressor genes are mediated by
A) hereditary mutations in gene base sequence.
B) spontaneous mutations in gene base sequence.
C) DNA methylation.
D) DNA double-strand breaks.
E) pyrimidine dimer formation.
Answer: C
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Which group of protozoans has a
single large mitochondrion?
1.eugloenoids 2.diplomonads 3.parabasalids 4.kinetoplastidsStabilizing selection would be present if
A. gene frequencies do not change from one generation to the next. B. mutations constantly replace the genes lost from one generation to the next. C. there are no selecting agents. D. All of these are possible.
After infecting the cell, HBV's gapped DNA is released into the nucleus where host ________ enzymes fill the gap and seal the nick, yielding a covalently closed, circular DNA.
Fill in the blank(s) with the appropriate word(s).
Viruses are not generally studied by microbiologists because they are not classified as living organisms.
Answer the following statement true (T) or false (F)