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Chapter 15

Multiple-choice Quiz

Multiple-choice Quiz

This activity contains 8 questions.

	A human disorder thought to be due to a mutation eliminating or reducing DNA repair activity is __________.   Lesch-Nyhan syndrome xeroderma pigmentosum Tay-Sachs disease albinism Down syndrome

	The role of tautomerism in causing mutations relates to the fact that the process ultimately affects the __________.   covalent bonding affinities of the nitrogenous base hydrogen bonding affinities of the nitrogenous base deoxyribose sugar ability of DNA to replicate at all phosphate group

	When comparing ultraviolet light and X rays, __________.   X rays have longer wavelengths and are thus less mutagenic X rays and UV light are of the same wavelength and are equally mutagenic X rays have a shorter wavelength than does UV light X rays have longer wavelengths and are thus more mutagenic X rays have shorter wavelengths and are thus less mutagenic

	Myotonic dystrophy patients exhibit __________.   no dystrophin and a single nucleotide change a triplet sequence repeated many times trisomy a single nucleotide change no dystrophin

	The Ames test assays whether or not a compound causes __________.   chromosome mutations gene mutations DNA repair crossing over cancer

	A regulatory mutation has been observed randomly throughout a population of one million. Families with members carrying this mutation are not related genetically. This mutation is probably __________.   a spontaneous mutation a gametic mutation a somatic mutation a spontaneous, somatic mutation an induced gametic mutation

	A frameshift mutation is one of the most severe types of mutations because __________.   they occur only in gametes more than one gene is affected they cannot be reversed more than one amino acid or entire proteins are affected translation is stopped

	The discovery of transposons showed that genetic information __________.   is not fixed in the genome can be altered is passed from one generation to another can be transferred between species

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