The buildup of mucus and blockage of airways in pertussis is due to
What will be an ideal response?
Toxins that destroy the ciliated cells of the respiratory tract.
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GCCCAAAG is a molecule of
A. RNA. B. DNA. C. protein. D. cannot tell as written.
2-amino-purine is a mutagenic chemical whose structure closely resembles that of adenine. It would
therefore be A. a base analog that causes substitution mutations. B. a base analog that causes frameshift mutations. C. an intercalating agent that causes substitution mutations. D. an intercalating agent that causes frameshift mutations. E. It could act in any of these ways.
Which protist clade (supergroup) is characterized by their greatly modified mitochondria?
a. excavates b. unikonts c. rhizarians
d. archaeplastids e. chromalvolates
Human females with XY chromosomes and a phenotype that includes the absence of a uterus and ovaries and the presence of testes are likely to have which of the following mutations?
A. a deletion that removes much of the Y chromosome B. a defect in a gene involved in X inactivation C. a mutation in the androgen receptor gene D. They likely do not carry a mutation but may have been premature babies. E. a mutation in the SRY gene