Which of the following is the longest phase of
the cell cycle?
a. interphase
b. prophase
c. metaphase
d. anaphase
e. teleophase
A
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Organic molecules with identical molecular formulas and that are structurally mirror images of each other are most specifically referred to as
A. polymers. B. mimics. C. enantiomers. D. hydrocarbon rings. E. saturated fatty acids.
Cells become progressively committed to specific patterns of gene activity and developmental fate
through a process known as: a. morphogenesis. b. determination. c. cell differentiation. d. nonspecific differentiation. e. growth.
Which statement best describes the three types of systems?
a. An isolated system does not exchange energy or matter with its surroundings; a closed system exchanges only energy, but not matter with its surroundings; an open system exchanges both energy and matter with its surroundings. b. An isolated system does not exchange energy or matter with its surroundings; a closed system exchanges only matter, but not energy with its surroundings; an open system exchanges both energy and matter with its surroundings. c. An isolated system exchanges energy with its surroundings; a closed system exchanges only matter, but not energy with its surroundings; an open system exchanges both energy and matter with its surroundings. d. An isolated system exchanges energy with its surroundings; a closed system exchanges only energy, but not matter with its surroundings; an open system exchanges matter, but not energy with its surroundings.
All of the following are true of prions and prion diseases, except
A. prion diseases are diagnosed by an indirect ELISA test that detects antibody to prions. B. prions are composed exclusively of protein. C. prions are not readily destroyed by routine sterilization methods. D. prion diseases are all neurodegenerative diseases. E. there are no medications that can halt the progression of prion diseases.