Which one of the following causes transmembrane channels in target cells?

A) granzymes
B) hapten
C) IL-1
D) IL-2
E) perforin


E

Biology & Microbiology

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Superantigens produce a harmful immune response because

A) they activate too many T cells, causing excessive inflammation and cell damage. B) they initiate a type I allergic response resulting in excessive inflammation. C) too many phagocytes are activated and destroy host tissue. D) a strong immune response is necessary to protect the host from the pathogen.

Biology & Microbiology

The intermediate disturbance hypothesis says that species richness is least in a community that has

moderate disturbances.

Indicate whether the statement is true or false.

Biology & Microbiology

Honeybees convey information to other worker bees

in the hive about all EXCEPT the __________ of a food source. a. direction b. general location c. distance d. abundance e. angle relative to the sun

Biology & Microbiology

Chromosomes contain large amounts of interacting proteins known as

a. pentanes. b. hexosamines. c. histones. d. protein hormones. e. histamines.

Biology & Microbiology