Enzymes function best in the body at a pH of
a. 6.0?6.5.
b. 7.0?7.2.
c. 7.35?7.4.
d. 7.5?7.55.
e. 7.2?7.5.
C
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Nocardia spp. cause which of the following types of infections in individuals who are immuno-compromised?
a. Mycetoma b. Lymphocutaneous infections c. Skin abscesses or cellulites d. Invasive pulmonary infections
Which of these is not part of loose connective tissue?
A. collagen B. elastin C. reticulin D. chondroitin E. adipose cells
Which of the following statements about phospholipids is false?
a. They are amphipathic molecules. b. They contain three fatty acids chains. c. They contain a polar organic group attached to a phosphate group. d. They have cylindrical shapes that allow them to associate with water most easily as a bilayer structure. e. They have two distinct regions, one strongly hydrophobic and the other strongly hydrophilic.
How many chromosomes should be in a generative cell nucleus?
A) 8 B) 16 C) 24 D) 32