Which two atoms are found in all organic compounds?
a. carbon and hydrogen
b. carbon and oxygen
c. oxygen and hydrogen
d. carbon and phosphorous
e. oxygen and sulfur
ANSWER: a
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What is the first step of the adaptive immune response?
a. Recruitment of helper T cells b. Inflammation c. Mast cells attacking the antigen d. Fever e. Recognizing a specific antigen
Planes maintain an atmospheric pressure equivalent to about 8,000 feet to
a. maintain a stable temperature. b. maintain oxygen levels. c. maintain oxygen availability. d. maintain oxygen levels and maintain oxygen availability. e. maintain oxygen availability and reduce buildup of carbon dioxide.
The property of a test to detect only a certain antibody or antigen, and not to react with any others, is
A.) cross-reactions B.) agglutination C.) precipitation D.) specificity E.) sensitivity
Which molecule is involved in transcription?
a. tRNA b. DNA, 5'-3' strand c. DNA, 3'-5' strand d. DNA polymerase