Which of the following statements are true regarding heavy (H) chains? Select all correct choices
A. Antibodies contain two heavy chains.
B. Heavy chains contain variable and
constant regions.
C. Heavy chains are formed by the
recombination of V, J, and C gene segments.
D. Heavy chains are formed by the
recombination of V, J, C, and D gene
segments.
E. Heavy chains contain only a hypervariable
region.
A,B,D
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Which gland produces the hormone that raises blood calcium levels?
a. pituitary gland b. parathyroid gland c. thyroid gland d. pineal gland e. pancreas
The corpus luteum is located in the
A) penis. B) ovary. C) testis. D) uterus. E) vagina.
As a specific locus, a child can inherit only ___ allele from his or her father and ___ allele from his or her mother.
What will be an ideal response?
How are prions different from all other known infectious agents?
A. they cannot reproduce outside a cell. B. they act as slow viruses. C. they cause neurological problems. D. they can be destroyed by incineration. E. they lack nucleic acid.