Before a pathogen can be destroyed in the antibody-mediated process, a T helper cell must recognize a(n) ____ on the
surface of a macrophage.
a. antigen-MHC complex
b. antibody
c. interleukin
d. HLA group
e. antigen
a
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Transcription
a. involves both strands of DNA as templates. b. uses the enzyme DNA polymerase. c. results in a double-stranded end product. d. produces three different types of RNA molecules. e. is true of all of these
Which of the following is NOT true regarding
apoptosis? a. It is programmed cell death. b. It sculpts body parts. c. It primarily eliminates old, diseased cells. d. It involves cell self-destruction. e. The formation of the human hand is an example.
Andalusian chickens with the genotype CBCB are black, those with the genotype CBCW are gray. What is the relationship between the CB and the CW alleles?
A) CB is dominant to CW. B) CB is recessive to CW. C) CW is dominant to CB. D) The relationship is one of incomplete dominance. E) CB and CW are codominant.
The enzyme ________, that is found in tears and saliva, can hydrolyze the bonds in the glycan chains of certain bacterial cell walls.
Fill in the blank(s) with the appropriate word(s).