Chapter 11 Mastering Biology Picture Questions

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a. off b. off c. on d. on e. on

Complete this table by indicating whether the lac operon is on or off under the following conditions.

a. histone b. nucleosome c. supercoil d. chromosome e. chromatin

Drag each label to its proper place in the diagram.

D

In this drawing of the lac operon, which molecule is an inactive repressor?

C & D Both RNA polymerase and transcription factors bind with the promoter.

Part complete Which of these directly bind(s) to the promoter?

1. Isolate mRNA from target cells 2. produce cDNA from mRNA 3. add cDNA to microarray wells 4. Rinse to remove unbound cDNA 5. Examine fluorescence on microarray

Summarize the steps involved in a DNA microarray analysis.

introns

The regions of noncoding DNA shown below that separate the coding regions within a gene are called __________.

D

Which of these acts as a second messenger?

A

Which of these indicates an enhancer region?

D

Which of these is a regulatory gene?


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