Which of the following is NOT true of transposition? O A) a replicative form of transposition is possible for DNA-only transposit B) flanking direct repeats are a by-product of transposition formed at the transposition site C) inverted repeats are formed in all types of transposons long-terminal repeats are found in the class of retrotransposons that D) resemble retroviruses

1) Assume you have an operon that is repressible. In this case, the rate of synthesis of repressor protein must depend on the level of a) co-repressor b) inducer c) both d) neither

In the trp operon, if a mutation occurred in the gene for the repressor so that it could bind to the operator even in the absence of tryptophan____________. a) the inducer cannot bind trpO, so operon gene transcription occurs b) the active repressor cannot bind trpO, so operon gene transcription is attenuated c)the active repressor binds tpO, so operon gene transcription is always repressed d) the repressor binds the corepressor, and operon gene transcription occurs.

Select all that apply: A SNP (single nucleotide polymorphism) is similar to an STR (short tandem repeat) in that: a) an individual can have many different copies of specific SNP or STR b) they both cause diseases c)they are sequences that have many possible variants d) an individual has one copy of this region of the genome from each parent.

Describe what would happen to the lac operon in a low-lactose environment and in a high lactose environment. a) How will each of these environments affect gene expression? b) What would happen to the repressor in each case? c) How will each of these environments affect RNA polymerase?

An extra chromosomal segment of circular DNA of a bacterium is used to carry gene of interest into the host cell. What is the name given to it?

Which will be bound to the Lac Operon in an environment with lactose and glucose? A) both repressor and CAP B) repressor only C) CAP only D) neither repressor nor CAP

What evolutionary advantage would a retrovirus gain by having the ability to regulate the sites of splicing of its RNA?

7) The tryptophan operator a) is an allosteric protein. b) binds to the tryptophan repressor when the repressor is bound to tryptophan. c) is required for production of the mRNA encoded by the tryptophan operon. d) is important for the production of the tryptophan repressor. Page 2 of 6