Which of the following results in a spontaneous mutation?
A. free radicals produced by cellular metabolism
B. exposure to ultraviolet light
C. exposure to benzo (a)-pyrene, a chemical substance found in cigarette smoke
D. exposure to ultraviolet light and benzo (a)-pyrene
E. exposure to X-rays
A. free radicals produced by cellular metabolism
You might also like to view...
Homology is evidence of ________.
A. .natural selection B. binomial classification C. artificial selection D. common ancestry
In the overall reactions of photosynthesis, it appears that hydrogen atoms are transferred from water to
carbon dioxide to form a carbohydrate. This type of reaction is classified as: a. a redox reaction. b. an anaerobic reaction. c. a catabolic reaction. d. an oxidation reaction. e. a hydrolytic reaction.
Nonprotein coding pieces of pre-mRNA that are removed during RNA splicing are called ________
A) introns B) exons C) SNPs D) promoters E) poly(A) tails
A student needs information from the National Institutes of Health, a government agency. Which one of the following endings should he or she look for in the Internet address?
A) edu B) com C) gov D) nih E) org