X chromosome inactivation results in the
a. total inactivation of both X chromosomes.
b. inactivation of only the paternal X
chromosome.
c. inactivation of only the maternal X
chromosome.
d. inactivation of either the paternal X
chromosome or the maternal X
chromosome.
e. nonrandom inactivation of X chromosomes
in the initial cells of tissues
D
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Which of the following do not induce a strong immune response?
A. Lipids B. Proteins C. Polysaccharides D. Simple sugars. E. Lipids AND simple sugars.
A(n) ________ is an enlarged lymph node that appears during cases of the plague.
Fill in the blank(s) with the appropriate word(s).
If lactose and glucose are present, will the lac operon be on or off?
What will be an ideal response?
The feature that most clearly separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells.
a. ribosomes b. oxidative phosphorylation c. DNA molecules d. a nucleus