Which body site is preferentially infected by foodborne pathogens?
A) gastrointestinal tract
B) respiratory tract
C) cerebrospinal fluid
D) liver
Answer: A
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A reciprocal translocation between two chromosomes can result in the formation of a(n) ____________________ gene
Fill in the blank(s) with correct word
RNA and DNA differ
A) in that RNA contains ribose and DNA contains deoxyribose. B) in that RNA contains nucleosides and DNA contains nucleotides. C) in that RNA contains uracil and DNA contains thymine. D) both A and C. E) All of these are correct.
In step "b" the original strands have separated because
a. the hydrogen bonds between bases were broken. b. the sugar-phosphate linkages broke. c. the polymerases stopped functioning. d. the bases repelled each other. e. water changed the bases into their subunits.
In cells, __________ are proteins that are needed to lower the amount of energy required to start chemical reactions.
Fill in the blank(s) with the appropriate word(s).