The column of water extending in tubes from
plant roots to leaves is maintained by
a. cohesion among water molecules.
b. ionic bonds.
c. covalent bonds.
d. hydrophobic interactions.
e. hydrophilic interactions.
A
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Bacteria synthesize CDP-diacylglycerol in order to build ________, a major cell membrane phospholipid component.
A. lipopolysaccharide B. peptidoglycan C. lipid rafts D. phosphatidylethanolamine
The process of adding hydrogen to N2, creating NH3 and eventually NH4+, and which requires a substantial input of ATP, is called ____.
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation e. nitrogen assimilation
Microbes are not likely to be found in which of the following locations on human skin?
A. The stratum corneum B. Sebaceous gland C. Hair follicle D. Sensory nerve fiber in the dermis
Shingles, or herpes zoster, is caused by the virus that also causes
A) cold sores. B) chickenpox. C) smallpox. D) molluscum contagiosum. E) warts.