Enzymes that catalyze the removal of carbon dioxide from a substrate are called...
a) phosphotransferases
b) oxidoreductases
c) decarboxylases
d) aminotransferases
e) ligases
Answer: c) decarboxylases
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You discover a green, filamentous multicellular eukaryote growing at the edge of a pond. How could you determine if the organism is a green alga or a plant?
a. Determine if the organism protects and nourishes its embryos. b. Determine if the organism protects its zygotes. c. Examine the cell walls to see if they are composed of cellulose. d. See if the organism stores its excess carbohydrates in the form of starch. e. Test for the presence of chlorophylls
If infection primarily involves the outermost layers of adult amphibian skin, and if the chytrids use the skin as their sole source of nutrition, then which term best applies to the chytrids?
A) anaerobic chemoautotroph B) aerobic chemoautotroph C) anaerobic chemoheterotroph D) aerobic chemoheterotroph
Autosomal recessive genetic disorder that causes a lack of the enzyme that metabolizes phenylalanine; the accumulation of phenylalanine causes problems with nervous system development and function.
What will be an ideal response?
People living in the northeastern United States are more at risk for exposure to which of the following rickettsias?
A) Rickettsia rickettsii B) Rickettsia typhi C) Ehrlichia chaffeensis D) Orientia tsutsugamushi E) Rickettsia prowazekii