Which of the following actions would increase enzymatic activity in a bacterial cell that normally thrives in the human body?
a. adding a second substrate that can act as a competitive inhibitor
b. slightly increasing the temperature within the optimum range
c. placing the bacteria in the refrigerator
d. increasing the substrate level in the environment beyond saturation
Answer: b. slightly increasing the temperature within the optimum range
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Which ocean zone extends from low tide to the edge of the continental shelf?
a. Neritic zone b. Intertidal zone c. Abyssal zone d. Aphotic zone
A researcher wants to develop a test that will distinguish charophytes and land plants from green algae. Which of the following chemicals would be the best subject for such an assay?
A) chlorophylla photosynthetic pigment B) carotenoidsa class of accessory photosynthetic pigments C) starcha food storage material D) glycolate oxidasean peroxisomal enzyme that is associated with photorespiration E) flavonoidsa class of phenolic compounds that is often associated with chemical signaling
Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?
A. Polyplacophora-eight calcareous plates B. Gastropoda-torsion C. Bivalvia-reduced head and no radula D. Nudibranchs-extensive gills in mantle cavity E. Cephalopoda-closed circulatory system
Which of the following processes describes the formation of a complementary RNA molecule?
A) replication B) mosaicism C) mutation D) transcription E) translation