A concussion is caused by ____
a. the accumulation of tau proteins in the brain
b. chronic traumatic encephalopathy due to multiple head injuries
c. mechanical stress resulting from an impact to the head
d. sensory overstimulation resulting from an impact to the head
e. damage to nerve nets caused by exposure to explosions in combat zones
ANSWER: c
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The codon AUA codes for which amino acid?
a. isoleucine (Ile) b. asparagine (Asn) c. threonine (Thr) d. methionine (Met)
Which of the insects in the accompanying figure is a flea?
a. 1
b. 2
c. 3
d. 5
e. 6
Refer to the accompanying figure. The component labeled as B is:
a. DNase.
b. DNA polymerase.
c. RNA primase.
d. RNA polymerase.
e. reverse transcriptase.
The ability of a microbial cell to produce beta-lactamases is based on _______.
A. other organisms B. its environment C. the temperature D. its genetics