The cascade of enzyme reactions that ends in clot formation is begun by ________
a. the exposure of collagen in the damaged vessel wall
b. albumin contacting the basement membrane
c. the conversion of fibrinogen to fibrin
d. exposure of blood to air
a
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What process copies a sequence of DNA nucleotides into a complementary sequence of RNA nucleotides?
A) translation B) mutation C) transcription D) duplication
Which of the following methods would be most appropriate for gathering data to plot a bacterial growth curve throughout the four phases?
a. plate count b. indirect estimate based on turbidity c. electronic cell counter d. Any of these methods will provide reliable data for plotting a growth curve. e. direct microscopic count
You find a strange infection in your mouth and visit your dentist. The dentist said the new organism was prokaryotic because it had ________
A) DNA in the nucleus B) membrane-bound organelles C) relatively large cells D) circular DNA
Assume that a trait is caused by the homozygous state of a gene that is recessive and autosomal. Nine percent of the individuals in a given population express the phenotype caused by this gene. What percentage of the individuals would be heterozygous for
the gene? Assume that the population is in Hardy-Weinberg equilibrium. A) 42% B) 91% C) 9% D) 58%