Influenza A virus can be identified by which of the following surface glycoproteins?

A) HA
B) NA
C) both HA and NA
D) M protein


Answer: C

Biology & Microbiology

You might also like to view...

Although in vitro susceptibility testing is not reliable, which regimen of antibiotics is recom-mended for Brucella infections?

a. Penicillin and azithromycin b. Ampicillin and gentamycin c. Doxycycline and rifampin d. Gentamycin and vancomycin

Biology & Microbiology

The Dlx gene encodes a transcription factor that signals clusters of embryonic cells to ____ and gives rise to an

appendage. a. fold into the cardiac muscle b. protrude from the body c. form reproductive structures d. induce apoptosis in cells lining the appendages e. develop into the immune system

Biology & Microbiology

Prior to muscle fiber stimulation

a. the sarcomeres are contracted. b. the myosin heads are in the resting position. c. the myosin heads are activated. d. calcium is sequestered in the sarcoplasmic reticulum. e. all of these occur.

Biology & Microbiology

If a bacterial culture growing on an agar plate was exposed to UV light at a wavelength of 254 nm for 10 minutes, and then a bacterial smear was made of the culture, would you expect to see bacterial cells on the slide?

A) No, the cells will have fragmented. B) Yes, the cells will still be present but UV light will have damaged the DNA.

Biology & Microbiology