Question

Determine the nature of the expression of the laczya genes, represented by l, and label each genotype as constitutive, inducible, or no transcription in the presence of lactose. Assume that all promoters are wild type.

Answer 1

The labelling of the genotypes is as follows:

• I+ O+ L+   Inducible
• I+ OC L+   Constitutive
• I+ OC L+, F’   Constitutive
• I- O+ L+, F’   Inducible
• Is O+ L+    no transcription
• Is O+ L+, F’   no transcription

What is a Lac Operon?

A Lac Operon refers to a set of genes with a single promoter that is responsible for the uptake and metabolism of lactose in bacteria.

A Lac Operon is an inducible operon.

The symbols and representation of the Lac Operon is given below:

• I-    - laci mutant cannot bind to the operator
• Is   - (laci mutant always bind to the operator
• OC  - Operator mutant that prevent repressors binding
• F’     - the wild type operator, O+, and laci gene on a plasmid
• L    -  lacZYA genes

Based on the symbols and representation, the labelling of the genotypes is as follows:

• I+ O+ L+   Inducible
• I+ OC L+   Constitutive
• I+ OC L+, F’   Constitutive
• I- O+ L+, F’   Inducible
• Is O+ L+    no transcription
• Is O+ L+, F’   no transcription

Learn more about Lac Operon at: https://brainly.com/question/1619875

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