The specific regions within the variable region of an antibody that are responsible for antibody diversity and antigen specificity are called ________ regions.
Fill in the blank(s) with the appropriate word(s).
hypervariable
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The translocation seen in the Philadelphia chromosome in myelogenous leukemia represents ____
a. a chromosomal aberration that is secondary to the cancer b. a chromosomal aberration that is caused by the development of cancer c. a proto-oncogene that has been deleted from chromosome 6 and inserted into chromosome 7 d. a specific chromosomal aberration accompanying a specific cancer e. the evidence of exposure to chemical carcinogens
In atherosclerosis,
a. the lumen of the artery is narrowed b. the arterial walls fill with fibrous connective tissue. c. lipids in the bloodstream become embedded in the walls of the endothelial lining. d. a fibrous net covers the entire abnormal area. e. all of these occur.
What happens during an autoimmune disease such as multiple sclerosis?
A) B cells are no longer able to make antibodies. B) Helper T cells are no longer produced. C) Infectious agents are able to hide in immune system cells. D) Immune system cells attack healthy body cells.
Scientists were able to produce induced pluripotent stem cells by introducing key hemeotic factors into mature mouse
fibroblasts and human skin cells. _________________ Indicate whether the statement is true or false.