What class of antibodies is normally found in the mucosa of the respiratory tract?
a. IgA
b. IgD
c. IgE
d. IgG
e. IgM
a
You might also like to view...
The organ system that is responsible for the exchange of gases with the environment.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
Which one of the following sexually transmitted diseases is currently the most prevalent in the United States?
A) gonorrhea B) syphilis C) AIDS D) genital warts E) chlamydia
Which of the following statements concerning transcription in bacteria is FALSE?
A) It occurs in the nucleoid region. B) Sigma factors are parts of RNA polymerase that recognize promoter regions. C) Different RNA polymerases are required for synthesis of mRNA, rRNA, and tRNA. D) Termination is either self-induced or due to the presence of Rho protein. E) There are a variety of sigma factors that affect transcription.
In the five-kingdom classification system broadly accepted in the 1960s, how many kingdoms included prokaryotes?
a. zero b. one c. two d. three e. four