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