Is there photosynthetic activity in the benthic zone of the ocean?
A) Yes, because this is the richest zone for nutrient turnover due to microbial activity.
B) Yes, because this is the zone of high light penetration and photosynthetic activity.
C) Yes, because high light and high nutrient conditions are optimal for phytoplankton production.
D) No, because this is below the photic zone.
E) No, because nutrient availability is too low.
Answer: D
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Circulatory systems compensate for _____
A) temperature differences between the lungs and the active tissue B) the slow rate at which diffusion occurs over large distances C) the problem of communication systems involving only the nervous system D) the need to cushion animals from trauma E) the need that fetal organisms have for maintaining an optimal body temperature
Post-translational regulation of an enzyme's activity, such as glutamine synthetase, can be finely controlled at varied levels due to
A) the varied strengths metabolite-regulating compounds can have with the enzyme such as hydrogen bonding, covalent bonding, and van der Waals attractions. B) having multiple independently functional subunits. C) the structural strength enzymes have once properly folded compared to short-lived and easily degradable transcripts during translational regulation. D) weak chemical modifications of the enzyme rather than harsh protein-protein or protein-DNA interactions.
In general, the main goal of cloning is to include as many different genes as possible in a single cloning vector
Indicate whether the statement is true or false
Which of the following is not considered a macronutrient?
A. Cobalt (Co) B. Potassium (K) C. Calcium (Ca) D. Carbon (C)