Enzymes that are secreted by a cell to catalyze hydrolysis reactions are
A. apoenzymes.
B. regulated enzymes.
C. constitutive enzymes.
D. endoenzymes.
E. exoenzymes.
Answer: E
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Which is an example of acquisition of natural passive immunity?
A) a fetus protected from disease by its mother's antibodies B) a person who received his or her yearly influenza vaccine C) a person who acquired the chickenpox D) a person who received tetanus antiserum after stepping on a rusty nail
Vaccinations introduce ____ into the body to stimulate the immune system and produce immunological memory
a. T cells b. antigens c. antibodies d. B cells
e. dendritic cellsWhat ion is mainly responsible for seawater being slightly alkaline?
a. Carboxylic acid b. Carbon dioxide c. Bicarbonate d. Nitrogen
A bilingual couple can speak English and Spanish. They have a child that is also bilingual and can speak English and Spanish. Has evolution occurred?
A. No B. Yes