How does RNAi “silence” a gene?

What would the likely consequence be if a gene’s promoter was deleted or severely mutated?

Post-translational control refers to:

Which of the following is an example of positive regulation of gene expression?

In prokaryotes, control of gene expression usually occurs at the

Restriction enzymes were first discovered with the observation that

a. DNA is restricted to the nucleus.

b. bacteriophage DNA is destroyed in a host cell.

c. foreign DNA is kept out of a cell.

d. foreign DNA is restricted to the cytoplasm.

e. all of the above

What would the likely consequence be if a gene’s promoter was deleted or severely mutated?