Over time, cancerous cells typically lose the cell adhesion molecules embedded in their plasma
membrane. Loss of these molecules is best associated with which of the following traits of cancer
cells?
a. increased rate of cell division
b. production of new proteins
c. angiogenesis
d. migration to new locations in the body
e. loss of chromosomes
D
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Which of the following molecules would be expected to be immunogenic?
A. Progesterone, a lipid hormone. B. Serum albumin, a large protein. C. Glucose, a simple sugar. D. Linoleic acid, a fatty acid.
Which of the following is not true of protists as a group?
a. They are all single-celled. b. They are eukaryotes. c. They range in size from microscopic to large multicellular organisms. d. They likely belong to multiple kingdoms.
A geneticist conducts a 2-point test cross between two linked genes on Drosophila for body color (wild type gray, b+ and mutant black, b) and wing shape (wild type normal, vg+ and mutant vestigial, vg). She wants the heterozygote for the test cross to be in the repulsion (trans) configuration. What original P generation parents must she cross to create her heterozygote for the test cross?
a) b+b+/vgvg x bb/vg+vg+ b) b+b+/vg+vg+ x bb/vgvg c) b+b/vg+vg x bb/vgvg d) b+b+/vg+vg+ x b+b+/vg+vg+
Ergot poisoning is caused by
a) Giardia intestinalis. b) Claviceps purpurea. c) Aspergillus flavus. d) Entamoeba histolytica.