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An E. coli strain that is histidine (His) auxotrophic cannot synthesize histidine due to a mutation in the genes responsible for its biosynthesis, requiring histidine to be supplied in the growth medium. In contrast, a strain that is lactose (Lac) positive can utilize lactose as a carbon source due to the presence of functional genes that allow the uptake and metabolism of lactose. Therefore, while the His auxotroph relies on external histidine, the Lac-positive strain can metabolize lactose without requiring additional nutrients.
What else can I help you with?
The lac operon helps E. coli absorb?
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Lactose in take in E. coli?
it is by lac operon syastem
What causes the lac genes in E. coli to turn off?
A lac repressor turns off the lac genes by binding to the operator.
How does e coli with limited food supply respond?
The lac operon is switched on so the E. coli can use it as a food source.
Why is the E. coli lac Z gene used as a reporter gene in S. cerevisiae cells but not in E. coli cells?
The E. coli lac Z gene is used as a reporter gene in S. cerevisiae cells because the yeast lacks the lactose metabolism pathway, making it suitable for detecting lac Z expression. In contrast, E. coli naturally metabolizes lactose using the lac Z gene, so it is not ideal for use as a reporter gene in the same species.
How many genes in the lac operon are found in e. coli?
My answer is 3, I am pretty sure I am right, but I would double check to make sure. I am in ninth grade taking biology at PineTree.
What is the strain of ecoli that is occurring in Germany?
The strain of E. coli responsible for the outbreak in Germany in 2011 was a rare and highly virulent strain known as O104:H4. It was a hybrid strain that combined genes from two different types of E. coli bacteria.
What is the lac operon in E. coli a classic example of?
gene expression occurring at transcription
Why did the mix of E. coli 1 and E. coli 2 grow on the S and A petri dish when neither strain grew alone?
The growth of E. coli 1 and E. coli 2 on the S and A petri dish can be attributed to metabolic cooperation. One strain may produce a metabolite that the other strain can utilize, leading to growth that neither strain could achieve alone. This mutualistic interaction can enhance the overall fitness of the mixed population.
What is E. coli bl21?
E. coli BL21 is a commonly used strain of Escherichia coli bacteria in molecular biology research. It is known for its ability to efficiently produce recombinant proteins and is often used for protein expression and purification experiments.
What can come from e coli?
E. coli does not turn into anything. What it does is multiply. And depending on the strain that can be either beneficial or harmful.
What strain of food poisoning is caused from bad hamburger?
E Coli
