Which protein class directly controls many of the metabolic reactions within a cell?

A) operator proteins
B) enzymes
C) structural proteins
D) repressor proteins
E) hydrophilic proteins


B

Biology & Microbiology

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Which group of seedless vascular plants was the first to evolve roots?

A) club mosses B) horsetails C) ferns D) whisk ferns

Biology & Microbiology

Which large group of animals consists largely of osmoconformers?

A. marine invertebrates B. bony fish C. mammals D. insects E. amphibians

Biology & Microbiology

The equation AB + H2O ? A + B would be catalyzed by which of the following classes of enzymes?

A) oxidoreductases B) transferases C) hydrolases D) ligases E) isomerases

Biology & Microbiology

Water-soluble hormones affect target cells by binding to __________.

A) adenylate cyclase B) cytoplasmic receptors C) protein kinases D) cAMP E) plasma membrane receptors

Biology & Microbiology