During activation of a T cell, the cytokine it produces to stimulate its own proliferation is ________.

A. interleukin 1
B. interleukin 2
C. tumor necrosis factor
D. interferon gamma


Answer: B

Biology & Microbiology

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Which of the following threatens the Texas blind salamander?

a. aquifer depletion b. poaching c. overharvesting d. habitat fragmentation

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Of the following plastids, which is not paired with its proper function?

A) amyloplasts; sugar synthesis B) chromoplasts; contain non-chlorophyll pigment that give flowers distinctive colors C) chloroplasts; photosynthesis D) proteinoplasts; protein storage E) elaioplasts; lipid storage

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Which of the following characteristics does NOT distinguish the archaea from the bacteria?

A) the types of transfer RNA used B) the rRNA sequences present C) the deoxyribonucleotides D) cell wall composition E) cell membrane composition

Biology & Microbiology

The presence of Koplik's spots is sufficient for a diagnosis of (chickenpox/measles/rubella)

What will be an ideal response?

Biology & Microbiology