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

Biology & Microbiology

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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

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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 cells

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What ion is mainly responsible for seawater being slightly alkaline?

a. Carboxylic acid b. Carbon dioxide c. Bicarbonate d. Nitrogen

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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

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