A human egg is approximately 100 ?m in size. This would equal to ____ mm
a. 0.10
b. 10.0
c. 0.010
d. 0.0010
e. 1.0
A
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Endotoxins are released in large amounts only when cells lyse
Indicate whether the statement is true or false.
DNA replication can stall as a consequence of the replication machinery encountering hairpin DNA structures that can form due to inverted repeats and palindromic sequences
When DNA replication stalls, double-strand breaks in the DNA can occur, causing severe genetic and cellular consequences. Both Werner syndrome (premature onset of age-related phenotypes and cancer) and Bloom syndrome (cancer) are the result of mutations in helicase, an enzyme that unwinds hairpin structures. Helicase most likely breaks which type of bonds in a hairpin? A. glycosidic B. phosphodiester C. hydrogen D. peptide E. covalent
When a B cell contacts a foreign or abnormal antigen, it develops into a ________ that releases ________.
A) macrophage : histamine B) macrophage : antibodies C) plasma cell : histamine D) natural killer cell : antibodies E) plasma cell : antibodies
The unit used to measure the amount of energy in food is the
A. Calorie. B. calorie. C. gram. D. milligram.