Which of the following statements about natural killer cells is TRUE?
a. NK cells recognize and destroy infected cells using a three-receptor system.
b. NK cells exhibit memory after interacting with cells.
c. NK cells use granzymes to kill their targets.
d. NK cell number does not increase during recognition and destruction of infected cells.
Answer: C
You might also like to view...
In conjugation the donor cell is recognized by the presence of
A. an F plasmid. B. a Y chromosome. C. diploid chromosomes. D. an SOS response. E. an F plasmid AND diploid chromosomes.
Describe the life cycles of animals, plants/some fungi, and other fungi/algae with respect to the amount of time each
type of organism spends in their haploid and diploid phases. Also indicate whether those haploid and diploid phases are unicellular or multicellular.
What will be an ideal response?Brain tumors in children are very common in the cerebellum. Which symptoms might lead a doctor to suspect this
type of tumor?
a. difficulty hearing b. difficulty seeing c. difficulty walking d. forgetting previously learned skills e. suddenly starting to speak in gibberish
The building blocks of nucleic acids are
a. amino acids. b. fatty acids. c. monosaccharides. d. nucleotides. e. lipids.