C3b is involved in
A. opsonization.
B. interferon production.
C. properdin activation.
D. endotoxin production.
A
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Why do electron microscopes have the ability resolve such small objects?
a. Because electrons have a much shorter wavelength than the photons of visiblelight b. Because electrons have a much longer wavelength than the photons of visiblelight
During transcription,
a. non-coding sequences are removed from the RNA transcript. b. regulatory proteins attach to the DNA at the promotor site. c. DNA polymerase assembles RNA nucleotides. d. the entire DNA strand opens up for complete gene transcription. e. tRNA brings nucleotides to the DNA strand.
During conjugation, which cells are the recipients of the exogenous DNA?
a. F- cells b. F2 cells c. F1 cells d. F+ cells
You observe a mass of amoeba-like cells that swarm together, form a stalk, and produce spores. This is a(n)
A) ascomycete. B) cellular slime mold. C) Euglenozoa. D) tapeworm. E) plasmodial slime mold.