Somatic hypermutation does which of the following?
A) creates a change at a single nucleotide
B) copies nucleotide sequences from a pseudogene V into the V(J)D
C) swaps exons of the constant region between highly repetitive regions
D) all of these
A
Environmental & Atmospheric Sciences
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Which of the following brings a portion of an antigen to the surface of an infected cell?
A) antibodies B) B cells C) MHC molecules D) T cells
Environmental & Atmospheric Sciences
The four major classes of Earth's biomes are:
a. forest, grassland, desert, and highlands. b. grassland, desert, tundra, and forest. c. forests, shrubs, grasslands and tundra. d. none of these
Environmental & Atmospheric Sciences
Which one of these is a high silica rock that cooled slowly?
A. Rhyolite B. Basalt C. Gabbro D. Granite
Environmental & Atmospheric Sciences
Lateral levees are produced during:
a. creep b. slumping c. lateral spreading d. debris and earth flow
Environmental & Atmospheric Sciences