Which antibiotic is overcome by beta-lactamases?
a. Tetracycline
b. Sulfonamide
c. Penicillin
d. Tetracycline, Penicillin, and Sulfonamide are all affected by beta-lactamase.
Ans: c. Penicillin
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Why are steroid hormones bound to carrier proteins in the blood?
a. to prevent them from entering non-target cells b. to keep them in an inactivate state c. to mask hydrophobic groups on the steroids to allow for circulation in the blood d. to help them bind to surface receptors and trigger a cellular response e. to help them bind to surface receptors and trigger endocytosis
Cnidarians alone have _____
a. nematocysts c. a hydrostatic skeleton b. a mantle d. a radula
The purpose of irradiating foods is to ____
a. increase the vitamin content b. increase the mineral content c. destroy harmful bacteria, fungi and other microorganisms d. limit spoilage e. both destroy harmful bacteria, fungi, and other microorganisms and limit spoilage
Single-celled eukaryotic cells belong to which of the following domains?
A. Fungi B. Eukarya C. Animalia D. Plantae