1. how would you say "they want the boots"?
a. quereis las botas
b. quiere las botas
c. queremos las botas
d. quieren las botas

2. what is closest in meaning to "prefiero la gorra roja?
a. you prefer the red cap
b. i prefer the red cap
c. i will preper thered cap
d. she prefers the red cap

3. what or who is el cadejo?
a. a peace pact
b. a mythical dog
c. a traditional story-teller
d. a yearly feast

4. which of these is used to make special carpets in honduras?
a. pupusas
b. sawdust
c. rubber
d. fogaratas

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

What’s the student’s scientific question

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna