A nucleotide is the building block of what macromolecule?
a. DNA
b. protein
c. lipid
d. carbohydrate
A
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Humans become infected with tapeworms by ________
a. having sexual intercourse with infected people b. wading in water that is infested with Schistosoma larvae c. drinking untreated water directly from ponds or streams d. eating undercooked beef or fish that contain encysted larvae
How does stomach acid assist the innate immune system?
a. The acid signals B cells to the site of infection. b. The acid signals T cells to the site of infection. c. The acid creates an inhospitable environment for pathogens to live. d. The acid breaks down the food sources, and the pathogen starves.
Biofilm formations requires production of materials such as glycocalyx
a. true b. false
Which of the following describes fermentation forming lactate, ethanol, and CO2?
a. mixed acid b. acetogenic c. heterolactic d. homolactic