The variable region of a light chain is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: c
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A regulon always includes at least two operons
Indicate whether the statement is true or false.
In the biological species concept, it is specified that two organisms are of the same species if they
breed and
a. are unsuccessful in producing offspring. b. produce any offspring. c. produce fertile offspring under laboratory conditions only. d. produce fertile offspring under normal circumstances. e. produce infertile offspring.
What is the definition of a species cluster?
a. a group of closely related species with a common ancestor b. a group of species that developed host races c. a group of species that exhibit polyploidy d. a group of totally unrelated species living in a common habitat e. when allopatric and parapatric speciation occur together
These white blood cells kill virus-infected cells exhibiting "non-self" major histocompatibility complex (MHC) proteins
A) Plasma cells B) Macrophages C) Dendritic cells D) Neutrophils E) Natural killer cells