Catabolite repression of the lac operon restricts expression when:
A. glucose is absent.
B. lactose is absent.
C. glucose is present.
D. lactose is present.
C
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How would you design an sRNA to bind to a sequence?
A) select six continuous nucleotides from the sequence B) take the complementary sequence of six continuous nucleotides C) select 200 continuous nucleotides from the sequence D) take the complementary sequence of 200 continuous nucleotides
The oxygen production measured in the experiments of this exercise
(a) is a consequence of the breakdown of hydrogen peroxide. (b) is an index of enzyme activity. (c) may depend on pH, temperature, or enzyme concentration. (d) is all of the above.
Once the strands of DNA are separated, the enzyme DNA polymerase ____ and links nucleotides together
a. reads the nucleotide sequence of the template strand b. transforms the template strand to either 3' or 5' c. transforms adenine to thymine and guanine to cytosine d. folds the bases back on themselves e. unwraps the DNA from the nucleosomes
Any heightened immune response resulting in tissue damage is called a(n) ________.
A. autoimmune disease B. desensitization C. immunodeficiency D. transfusion reaction E. hypersensitivity