________ cells provide for a rapid secondary immune response.

A) Memory
B) Effector
C) Cytotoxic T cells
D) Mast
E) Dendritic


Ans: A) Memory

Biology & Microbiology

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Sulfide oxidizers are among the most ecologically diverse trophic groups because of the different strategies they employ to access sufficient amounts of sulfide and oxygen simultaneously

Indicate whether the statement is true or false.

Biology & Microbiology

When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus; therefore, you conclude that the cell must be a type of __________ cell.

A) plant B) eukaryotic C) fungal D) prokaryotic

Biology & Microbiology

If you were designing a method to specifically inhibit prokaryotic transcription, but not eukaryotic transcription, interfering with which of the following would work best?

A) an intercalating agent B) recognition of the prokaryotic promoter by RNA polymerase C) DNase activity D) RNA polymerase II activity E) ribosomal binding to mRNA

Biology & Microbiology

Figure 16.2 illustrates an interaction between a(n)

A. antigen presenting cell and a B lymphocyte. B. antigen presenting cell and a helper T lymphocyte. C. NK cell and its target cell. D. cytotoxic T lymphocyte and its target cell. E. antigen presenting cell and a plasma cell.

Biology & Microbiology