"Plaque-busting" drugs are called
a. antibiotics.
b. antihelminthics.
c. statins.
d. antineoplastics.
e. antihypertensives
C
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Which of the following statements about stem cells is NOT accurate?
A. Stem cells can undergo mitosis. B. Some stem cells can differentiate into more than one type of specialized cell. C. Different types of stem cells vary in their potency. D. Stem cells are only found in embryos. E. Some stem cells can only differentiate into one cell type.
Huntington’s disease (HD) is a neurodegenerative genetic disorder involving an autosomal dominant mutant allele with high penetrance. If a father’s mother had HD, what is the probability that his first child will also have HD?
a. It depends on whether the father has the allele. b. It depends on whether the trait is recessive. c. 0.5 or 50% d. 0.25 or 25%
John Tyndall demonstrated that microorganisms present in the air are carried on dust particles.
Answer the following statement true (T) or false (F)
Chemicals in tobacco smoke can cause
a. DNA to break into pieces. b. mispairing of bases. c. kinking in the DNA molecule. d. the formation of nucleotide dimers. e. covalent bonding between adjacent adenine bases.