Which of the following statements regarding the surface of the skin is FALSE?
A) It has sebum as a coating.
B) It has normal microbiota.
C) It has goblet cells.
D) It is salty.
E) It is acidic.
C
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The primary polysaccharides associated with the plant cell wall are the
A) hemicelluloses. B) extensins. C) fibronectins. D) pectins. E) both choices A and D
Suppose that the concentration of K+ inside the cell was 10, and the concentration of K+ outside of the cell was 100 mmol/l. Assuming 37C, the K+ equilibrium potential is ________.
a. -70 mV b. +61 mV c. -61 mV d. -90 mV
Small circular molecules of DNA in bacteria ____.
A. are plasmids B. are DNA fragments from their main chromosome C. result from the activity of restriction enzymes D. are eventually degraded E. cannot survive outside of the cell
Choose the letter of the best match from the following:A. Birth control pillB. Intrauterine deviceC. DiaphragmD. Foams and jelliesE. VasectomySperm blockage.
Fill in the blank(s) with the appropriate word(s).