Bacteria in our mouths feed off the sugars in foods that we eat. As these bacteria ferment the sugars, they generate a product that can cause dental cavities. What is this product?
A) Lactic acid
B) Citric acid
C) Acetyl CoA
D) Hydrochloric acid
E) Pyruvate
A
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A lacOc mutant would
A) never make lac structural genes. B) be constitutively expressed. C) bind receptor protein. D) have repressed expression. E) be able to be induced by lactose.
Genotype refers to
A) the number of alleles of a gene that a person has. B) the combination of alleles for a particular gene. C) a person's entire genome sequence. D) the appearance of a trait.
Randomly selecting samples of experimental
units from an environment can result in a. sampling error. b. blind testing. c. evidence. d. experimental design. e. consensus
Proto-cells are considered to have
a. been simple membrane-bound sacs. b. been able to capture energy. c. been able to engage in metabolism. d. been able to reproduce. e. all of these.