Use the following choices to answer the question:
a. Catabolite repression
b. DNA polymerase
c. Induction
d. Repression
e. Translation


Mechanism by which the presence of glucose inhibits the lac operon.

Identify when (before transcription, after transcription but before translation, after translation) each of the following regulatory mechanisms functions.

a. ATP combines with an enzyme, altering its shape.

b. A short RNA is synthesized that is complementary to mRNA.

c. Methylation of DNA occurs.

d. An inducer combines with a repressor.

Two offspring cells are most likely to inherit which one of the following from the parent cell?

a. A change in a nucleotide in mRNA

b. A change in a nucleotide in tRNA

c. A change in a nucleotide in rRNA

d. A change in a nucleotide in DNA

e. A change in a protein

Use the following choices to answer the question:

a. Catabolite repression

b. DNA polymerase

c. Induction

d. Repression

e. Translation

The mechanism by which lactose controls the lac operon.

Which sequence is the best target for damage by UV radiation: AGGCAA, CTTTGA, or GUAAAU? Why aren’t all bacteria killed when they are exposed to sunlight?

You are provided with cultures with the following characteristics:

Culture 1: F⁺, genotype A⁺B⁺C⁺

Culture 2: F ̄, genotype A ̄B ̄C ̄

a. Indicate the possible genotypes of a recombinant cell resulting from the conjugation of cultures 1 and 2.

b. Indicate the possible genotypes of a recombinant cell resulting from conjugation of the two cultures after the F⁺ has become an Hfr cell.

Plasmids differ from transposons in that plasmids

a. become inserted into chromosomes.

b. are self-replicated outside the chromosome.

c. move from chromosome to chromosome.

d. carry genes for antibiotic resistance.

e. none of the above