The toxin found in Amanita phalloides has deadly effects on humans because it inhibits ____

a. DNA replication
b. RNA polymerase
c. peptide bond formation
d. muscle contraction
e. active transport


ANSWER: b

Biology & Microbiology

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In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve

The presence of which of the following structures would allow for the most certain identification of the organism? A) a mantle B) a heart C) a body cavity D) a filter-feeding apparatus

Biology & Microbiology

Rachel Carson's book Silent Spring deals with the

A) destruction of polar habitats caused by global warming. B) environmental effects of pesticides. C) effects of lynx predation on snow hare populations. D) fate of tropical rain forests.

Biology & Microbiology

What kingdom does amphioxous belong to?

A. Animalia B. Cephalochordata C. Chordata D. Urochordata E. Vertebrata

Biology & Microbiology

A microbial ________ is a collection of strains that share many stable properties and differ significantly from other groups of strains.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology