Gene families are created when
A. genes duplicate.
B. exons converge.
C. viral infections occur.
D. introns are not removed from the mRNA after transcription.
E. both exon convergence and intron splicing.
A. genes duplicate.
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The multiple genetic and environmental factors affecting complex traits imply that different people can have the same disease for different reasons
A. true B. false
Cytokinesis usually occurs just prior to mitosis
a. True b. False Indicate whether the statement is true or false
Selection of culture media for specific specimens includes a variety of media for all of the following reasons except:
a. a nutritive media is included to insure growth of all potential pathogens. b. a selective media is often included to sup-press normal microbiota or other potential contaminating organisms. c. as enrichment media is utilized to cultivate organisms that do not grow on routine media. d. a back-up broth is included to provide in-oculum for additional testing.
What is the difference between covalent and ionic bonds?
A) Covalent bonds involve the sharing of electrons, whereas ionic bonds involve the sharing of protons. B) Covalent bonds involve the attraction between slightly charged molecules, whereas ionic bonds involve the attraction between two fully charged ions. C) Covalent bonds involve the sharing of neutrons, whereas ionic bonds involve the attraction of slightly charged atoms. D) Covalent bonds involve the sharing of electrons, whereas ionic bonds involve the transfer of electrons from one atom to another.