Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Describe in details all the differences between The Trp Operon and the Lac Operon. Why one is always off while the other is always ON? Can you find examples for other catabolic and anabolic pathways that could behave in the same way?
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- Which of the following is true about the Lac operon? Group of answer choices An operon with a constitutive operator (O^C mutation) will transcribe in the presence of a super repressor It is a positive repressible operon that is influenced mainly by fluctuations in glucose levels Produces a large quantity of tryptophan in order to synthesize lactase It is found in eukaryotes and is responsible for creating an enzyme that breaks down lactosearrow_forwardStrain ROFL4 has a premature stop mutation in the lacZ gene, resulting in a nonfunctional b-galactosidase. Otherwise all other parts of the operon are functional. 1. Can strain ROFL4 metabolize lactose if it is present? 2. If lactose is absent, will strain ROFL4 transcribe its lac operon? 3. If lactose is present, will strain ROFL4 transcribe its lac operon?arrow_forwardExplain and give an example (lac operon) of how inducer operons function in prokaryotes.arrow_forward
- In most experiments using the lac operon, researchers use the synthetic inducer IPTG to turn on operon expression, instead of lactose or allolactose. What do you think is the advantage of using IPTG?arrow_forwardDescribe how the components of the trp operon system are affected by a mutation in trpC? Why is it that once enviornmental tryptophan is inserted into the cell, only the trp repressor is activated (turned on)?arrow_forwardIn your own words describe in detail what happens at the lac operon in each of the following situations Lactose, no glucose (high cAMP) No lactose or glucose (high cAMP) Lactose and glucose (low cAMP) Glucose, no lactose (low cAMP)arrow_forward
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