In a(n) ______ solution, the cell has a higher water concentration than the surroundings and will lose water.
a) hypertonic
b) equilibrium
c) isotonic
d) hypotonic
Ans: a) hypertonic
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During the preparation of a human genomic library, plasmids containing human DNA fragments are inserted into:a
compatible human cells. b. an antibiotic-resistant strain of E. coli to protect the inserted fragments. c. antibiotic-sensitive E. coli cells that become antibiotic-resistant if transformed. d. bacteriophages. e. mRNA molecules.
An inversion heterozygote contains
A. two homologous chromosomes with inversions. B. two normal chromosomes. C. one normal chromosome and one chromosome with an inversion D. None of the answers are correct
Sterilization is achieved by
A. hot water. B. flash pasteurization. C. boiling water. D. steam autoclave. E. All of the choices are correct.
The autonomic nervous system consists of two parts: the sympathetic and parasympathetic divisions. The sympathetic division is responsible for which type of response?
A) Fight-or-flight responses B) Constriction of the air passages in the lungs C) Stimulation of digestion D) Slowing of the heart rate E) Rest-and-digest responses