Suppose that a DNA change results in the substitution of one codon for another, and the new codon specifies a different amino acid from the original. What type of mutation has occurred?
a. a chromosomal mutation
b. a missense mutation
c. a frameshift mutation
d. a silent mutation
Ans: b. a missense mutation
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Which of the following is likely required to initiate cell differentiation during development?
A. cell division B. the presence of mRNAs that express cell-specific proteins C. the buildup of cell-to-cell adhesion molecules D. the presence of carbohydrates E. hydration of the egg during fertilization
Hydrogenation is a chemical process that ____
a. turns liquid oil to solid fats b. turns amino acids into proteins c. turns DNA into lipids d. creates stable alternative energy sources e. creates unstable alternative energy sources
____________________ is spread by droplets produced when an infected person sneezes or coughs
Fill in the blank(s) with correct word
A petechial rash starting on the hands and feet and spreading to the torso is characteristic of
A) RMSF. B) anthrax. C) smallpox. D) necrotizing fasciitis. E) herpes gladiatorum.