The Genotype and Transcription in Presence of Only Glucose are:
Genotype Lac+ or Lac- Transcription (Presence of Glucose)
I+P-O+Z+Y/I+P+OCZ-Y+ Lac+ Yes
I+P+O+Z+Y+/I+P+O+Z-Y+ Lac+ No
I+P+O+Z+Y+/I-P+O+Z+Y+ Lac+ No
I+P-O+Z+Y+/I+P-O+Z+Y+ Lac- Yes
Gene regulation is seen as a vital for bacteria to efficiently utilize limited resources and respond to changes in their environment. By regulating gene expression, bacteria can conserve energy and metabolic resources by only producing proteins when they are needed.
So, the lac operon is an example of gene regulation in bacteria. It is responsible for the production of enzymes that break down lactose, a sugar that is not a preferred energy source for bacteria
See text below
47°F
1) Below are the genotypes for 3 partial diploids. For each one indicate if the cell would overall be Lac+ or Lac- (write Lac+ or Lac-) AND whether transcription of the lac operon would occur in the presence of only glucose, but not lactose (write yes or no).
Genotype
I+P-O+Z+Y/
I+P+OC Z-Y+
ISP+O+Z+Y+/
I+P+O+Z-Y+
I+P-O+Z+Y+/
I-P+O+Z+Y+
2) Why is gene regulation important in bacteria? How do the different regulatory strategies of the lac operon and the trp operon support this?