GENETICS (BIO 325) Fall 2009 Quiz 3 for discussion session Name_________________________________________Date________Unique#______ Write unique # you registered 51220 F 8-9a 51225 F 9-10a 51230 W 11-12p 51235 W 12-1p 1. HFr refers to a. a cell with an F plasmid b. a cell that has combined with the other cells by sexual reproduction c. a cell in which the F plasmid has been integrated into the cell chromosome d. a cell that has given away its F plasmid 2. ① An extra-chromosomal DNA molecule separate from the chromosomal DNA which is capable of replicating independently of the chromosomal DNA. ② In many cases, it is circular and double-stranded. ③ its size varies from 1 to over 1,000 kilobase pairs (kbp). ① , ② and ③ describe a. F+ b. F- c. Hfr strain d. plasmid 3. the symbol for “requires arginine added as a supplement to minimal medium” is a. arg r b. arg s c. arg + d. arg-4. During conjugation, the ______________ pulls two bacteria together enabling physical contact between
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