Which of the following best describes the role of catabolite repression in microbial metabolism?Question 18Answera.Increases the production of secondary metabolitesb.Prevents the synthesis of enzymes for secondary carbon sources when a preferred source is availablec.Activates the regulatory genes for enzyme productiond.Promotes the use of less preferred carbon sources
Question
Which of the following best describes the role of catabolite repression in microbial metabolism?Question 18Answera.Increases the production of secondary metabolitesb.Prevents the synthesis of enzymes for secondary carbon sources when a preferred source is availablec.Activates the regulatory genes for enzyme productiond.Promotes the use of less preferred carbon sources
Solution
The role of catabolite repression in microbial metabolism is best described as preventing the synthesis of enzymes for secondary carbon sources when a preferred source is available.
Here's a step-by-step explanation:
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Microorganisms, like bacteria, can use a variety of carbon sources for their metabolism. However, they have a preference for certain sources over others. For example, glucose is often a preferred source because it can be metabolized more efficiently.
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When a preferred carbon source is available, the microorganism will use this first. To ensure this, the microorganism uses a mechanism called catabolite repression.
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Catabolite repression is a regulatory mechanism that inhibits the synthesis of enzymes needed to metabolize secondary carbon sources. This means that when a preferred carbon source is present, the microorganism will not produce the enzymes needed to break down other sources.
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This mechanism ensures that the microorganism uses its resources efficiently. It will not waste energy producing unnecessary enzymes, and it will use the most efficient carbon source available.
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Therefore, the role of catabolite repression in microbial metabolism is to prevent the synthesis of enzymes for secondary carbon sources when a preferred source is available.
Similar Questions
What is the significance of catabolite repression in the production of penicillin?Question 15Answera.It has no impact on penicillin productionb.It increases the variety of metabolites producedc.It inhibits penicillin production in glucose-containing mediumd.It enhances penicillin production in the presence of glucose
Regulatory mechanisms in metabolic pathways do which of the following?Group of answer choicesA) allow for pathways like amino acid synthesis and amino acid catabolism to occur at the same time to the same degreeB) allow an organism to use the right fuel at the right timeC) use one or two methods to regulate enzymes to control the flux through a given metabolic pathwayD) ensure there are more end products of biosynthetic pathways than neededE) all of the above
Catabolite repression in E. coli primarily demonstrates how:Question 3Answera.The presence of glucose enhances the utilization of lactose.b.Lactose can increase the cAMP levels in the cell.c.Glucose presence inhibits lactose metabolism.d.Glucose and lactose are metabolized simultaneously.
Besides the lac operon, which other operons are subject to catabolite repression?Select your answer:Select your answerOPTION ALTERNATIVE Those involved in DNA replication. Those involved in protein degradation. Those involved in catabolism. Those involved in lipid synthesis.
Inhibition of which of the following metabolic pathways would result in decreased rates of CO2 production?Question 18Select one:a.fermentation and glycolysisb.oxidative phosphorylation and fermentationc.glycolysis and the oxidation of pyruvate to acetyl CoAd.oxidation of pyruvate to acetyl CoA and the citric acid cycle
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