AP Biology (Mader), 11th Edition

Chapter 13: Regulation of Gene Activity

Pre-Test

1
The _____ model proposed by Jacob and Monod explains gene regulation in prokaryotes.
A)endosymbiotic
B)cohesion-tension
C)operon
D)fluid mosaic
2
The short sequence of DNA where RNA polymerase first attaches when a gene is to be transcribed is called the _____.
A)promoter
B)operator
C)active site
D)replication fork
3
All of the following statements about the lac operon are true EXCEPT:
A)The lac operon is turned on in the presence of lactose.
B)The lac operon is an inducible operon.
C)The default position of the lac operon is 'ON'.
D)There are three structural genes in the lac operon.
4
After DNA is transcribed and preliminary mRNA is formed, _____ control occurs in the nucleus.
A)transcriptional
B)posttranscriptional
C)translational
D)posttranslational
5
_________ control changes the polypeptide product to make it biologically functional.
A)Transcriptional
B)Posttranscriptional
C)Translational
D)Posttranslational
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