When two or more genes from the same genome have nucleotide sequences so alike that they most probably arose from gene duplication those genes are called ________.
A. orthologs
B. paralogs
C. duologs
D. homologs
Answer: B
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It is customary to use _______ to represent the genotypes of individuals.
What will be an ideal response?
Agglutination tests make use of the fact that
A) antibodies have two antigen-binding sites and will cause clumping when bound to antigen. B) the presence of antibodies in a patient's serum will prevent viral infection of cells in culture. C) a reporter enzyme can be bound to an antibody to provide a visual change with a positive test. D) antibodies bound to antigen will precipitate in a gel matrix. E) T cells will release interferon-gamma during certain infections.
Most helminthic parasites spend at least some part of their life cycle in the
A) genitourinary tract. B) skin. C) respiratory tract. D) cardiovascular system. E) gastrointestinal tract.
Solutes move from a ____concentration to a ____ concentration during active transport.
a. high; low b. low; high c. high; equilibrium d. low; equilibrium