Which bone is found on the “thumb side” of the forearm?
a. scapula
b. humerus
c. radius
d. ulna
e. clavicle
ANSWER: c
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One mechanism by which ions are specifically transported into the cell is the
A) gated channel. B) alternating conformation model. C) carrier protein transport. D) uniport transport model. E) all of the above
Proteins that are encoded by the same gene but differ in structure and function are the product of alternative splicing in pre-mRNA processing. Such protein variants are termed
A) isoteins. B) heteromeric proteins. C) isozymes. D) protein isoforms. E) allelomorphs.
Which of the following human diseases is caused by a virus that requires reverse transcriptase to transcribe its genome inside the host cell?
A) herpes B) AIDS C) smallpox D) influenza
Quorum sensing is used by bacterial cells to determine which of the following?
A. the size of the population B. the availability of nutrients C. the speed of water flow D. the density of the population