What is the purpose of a buffer?
a. To convert an acid to a base
b. To minimize the change in pH
c. To measure the acidity of a solution
d. To form a stable bond between atoms
e. To maintain a constant internal temperature
b
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How many levels of consumption are depicted
in the figure? a. 1 b. 2 c. 3 d. 4 e. 5
Several medically important structures are identified by structural staing procedure. Which of the followings are included in this list?
A. Capsule b. Cell membrane c. Flagella d. Endospores e. Plasmid f. Lipopolysaccharide A. a, d, and e B. a, c, and d C. a, e, and f D. a, b, c, and d E. a, c, d, and e
Two populations of cells may end up segregating themselves into different layers during development because they have different:
A) phospholipid molecules. B) cell adhesion molecules. C) sizes. D) DNA. E) apoptosis programming.
In a longitudinal section of a nerve cell, at the presynaptic site you note a variety of vesicles that are anchored to the plasma membrane. The vesicles must be specialized for
A) constitutive secretion. B) regulated secretion. C) polarized secretion. D) zymogen secretion. E) none of the above