Which classification level contains the greatest number of species?
a. class
b. order
c. family
d. domain
e. phylum
d
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A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy is known as
A. osmosis. B. diffusion. C. facilitated transport. D. active transport. E. exocytosis.
In the tricarboxylic acid cycle, oxaloacetate reacts with acetyl CoA forming citrate
__________________ Indicate whether the statement is true or false.
The therapeutic range of an antimicrobial is the
A) ratio of the dose a patient can tolerate to the effective dose. B) range of microorganisms the antimicrobial effects. C) range of concentrations at which the antimicrobial is both effective and non-toxic. D) ratio of the concentration of antimicrobial in the blood to the oral dose. E) length of time the medication persists in the body after a single dose.
A beaker is divided into two halves, A & B, by a membrane that is freely permeable to the water and NaCl but not to protein. Side A is half-filled with a solution of 8% protein, while side B is half filled with a 2% protein solution. Predict what would happen to side A after a few hours.
A. The number of protein molecules has increased. B. The number of water molecules has decreased. C. The number of water molecules has increased. D. The percentage of water has decreased.