Sometimes atoms gain or lose particles. The loss of which of the following would result in a change of overall electrical charge?
A. protons or electrons
B. protons only
C. electrons only
D. neutron only
E. protons or neutrons
F. neutrons or electrons
Answer: A
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An epithelial tissue formed by more than one layer of cells and with column-like cells at the surface is called
a. simple squamous. b. stratified squamous. c. simple columnar. d. stratified columnar.
How will people with the same blood type be related?
A) They are always unrelated. B) They are always related. C) They may or may not be related. D) They always have both alleles in common but are not necessarily related.
How does the early development of the mouse differ from that of Caenorhabditis?
a. Embryonic mouse cells commit to their ultimate fate earlier than do the cells of Caenorhabditis. b. Early development of a mouse is regulative, while early development of Caenorhabditis is not. c. Mouse cells require higher concentrations of nutrients than do the cells of Caenorhabditis. d. Embryonic mouse cells differentiate much later than the cells of Caenorhabditis. e. Embryonic development in the mouse is controlled by transcription factors, while Caenorhabditis is not.
An integral membrane protein can be extracted with:
A. a buffer of alkaline or acid pH. B. a solution of high ionic strength C. a chelating agent that removes divalent cations D. a solution containing detergent E. hot water