Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
A. catalysis
B. metabolism
C. anabolism
D. dehydration
E. catabolism
E. catabolism
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Using phages to treat a bacterial infection is an interesting idea because
A. a single type of phage can destroy a wide range of strains of the same pathogen. B. of the increasing problem of antibiotic resistance. C. lysed bacteria pose no threat. D. a single phage can be genetically engineered to infect many different species of bacteria.
A purine or pyrimidine that is attached to a sugar, either ribose or deoxyribose, which is attached to one or more phosphate groups is called a ________.
A. nitrogenous base B. nucleotide C. nucleoside D. nucleic acid
Which of the following is a characteristic of microRNAs (miRNAs)?
A. MicroRNAs are short RNA molecules. B. MicroRNAs silence the expression of specific mRNAs. C. MicroRNAs are found in plants and animals. D. MicroRNAs are cut by an enzyme called dicer. E. All of the choices are correct.
The replacement fertility rate is ____.
A. the average number of children a man must sire to replace himself with a son who reaches reproductive age B. the average number of children woman must bear to replace herself with one daughter who reaches reproductive age C. the average number of children born per year in a population D. the birth rate minus the death rate of a population E. the number of boy–girl pairs born each year in a population