Question: Transcription of the structural genes in a repressible
operon
a. stops when the pathway’s product…



Transcription of the structural genes in a repressible
operon

a. stops when the pathway’s product is present

b. starts when the pathway’s product is present

c. stops when the pathway’s substrate is present

d. starts when the pathway’s substrate is present

e. occurs all the time

Which of the following statements is true?

a.

Euchromatin is highly condensed, while heterochromatin is less
compact.

b.

In heterochromatin the DNA tends to be unmethylated , while in
euchromatin the DNA is methylated.

c.

Heterochromatin is transcribed, while euchromatin is not
transcribed.

d.

In euchromatin the histones are acetylated, while in
heterochromatin the histones are deacetylated.

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