In addition to oncogenes, changes in what other gene is likely involved in cancer development?
a. proto-oncogenes
b. pre-oncogenes
c. post-oncogenes
d. dys-oncogenes
e. tumor suppressor genes
ANSWER: e
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Assume each of the following letters represents an amino acid. What type of gene mutation occurred to produce the following protein sequence?
Normal: JAYBIRDCATPAW Mutated: JAYBIRDBATPAW A. nonsense B. missense C. silent D. sense E. frameshift
Oversecretion of growth hormone in adulthood results in
a. pituitary gigantism. b. acromegaly. c. pituitary dwarfism. d. diabetes insipidus. e. cretinism.
Which portion of the lymphatic system is the site where T lymphocytes develop?
a. tonsils b. all lymph nodes c. liver d. thymus gland e. thoracic duct
Snakes are most closely related to:
a. lizards. b. turtles. c. eels. d. caecilians. e. synapsids.