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What is the effect of temperature on enzymes activity of lactose in bacterial cells?
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The obvious advantage of the lactose operon system is that?
lactose metabolizing enzymes need not be made when lactose is not present.
How does gene regulation of the lac operon promote homeostasis in intestinal E coli bacteria?
Lactose metabolizing enzymes need not be made when lactose is not present.This means when glucose is present, the cell does not waste energy/resources on creating these enzymes.
What happens when lactase is added to lactose?
When enzymes are boiled they become denatured, meaning they lose their function because they lose their shape. Any change in temperature or pH other than the one they are accustomed to will disturb an enzyme's shape; simply reverse their environment changes, and they'll go back to their correct function.
What effect do enzymes have on lactose?
That would depend upon which enzymes; lactase would break it down, others produce cheese, kefir, etc.
Why enzymes are necessary for biological process?
Enzymes are proteins which act as catalysts and allow complex chemical reactions to occur rapidly. Without enzymes, reactions would not occur quickly enough to allow cells to function effectively. For example, people who are lactose intolerant do not produce enough of the enzymes which break down lactose and therefore cannot digest lactose properly.Sources:Biology courseBrain, Marshall. "How Cells Work." HowStuffWorks. HowStuffWorks, Inc., 2002. Web. 26 Mar. 2011. .
What does the lac operon lactose bind to?
lac Z, lac Y, and lac A. Enzymes for the degradation and preparation of lactose for bacterial metabolisms.
The obvious advantage of the lactose operon system is that?
lactose metabolizing enzymes need not be made when lactose is not present.
How does gene regulation of the lac operon promote homeostasis in intestinal E coli bacteria?
Lactose metabolizing enzymes need not be made when lactose is not present.This means when glucose is present, the cell does not waste energy/resources on creating these enzymes.
Describe how gene regulation occurs in bacterial cells?
Escherichi coli (E. coli) bacteria provide a good example of gene regulation - E. coli bacteria are genetically encoded to regulate production of enzymes that digest lactose only when lactose is present and no glucose is available.
What are digestive enzymes related to lactose?
Lactase.Lactase is essential for digestive hydrolysis of lactose in milk. Deficiency of the enzyme causes lactose intolerance.
How can you describe the state of the lac operon system if the level of lactose is low indicating the activity and state of all major enzymes and proteins found in the system?
http://en.wikipedia.org/wiki/Lac_operon
What happens when lactase is added to lactose?
When enzymes are boiled they become denatured, meaning they lose their function because they lose their shape. Any change in temperature or pH other than the one they are accustomed to will disturb an enzyme's shape; simply reverse their environment changes, and they'll go back to their correct function.
What does lactose do?
Firstly, I think you phrased this question wrong because lactose is a substrate. It is the job of lactase (and enzyme) to break down lactose. Some people are lactose intolerant because their bodies do not have enough lactase enzymes to break down lactose.
When lactose is present in bacterial cell's it prevents the blocking effect of the repress or protein and allows the transcription of lactose metabolizing gene true or false?
false
When lactose is present in bacterial does it prevent the blocking effect of the repressor protein and allow the transcription of lactose metabolizing genes?
Yes. A precursor to lactose binds to the repressor and prevents or relaxes its binding to the Lac operon.
What makes some people lactose intolerant as adults?
Some people don't produce any enzymes, including the one needed to digest lactose
If a person is lactose intolerant their body cant absorb what?
Their body can't absorb lactose...There are enzymes in your small intestine which break down lactose called lactase. Lactase breaks down lactose into galactose and glucose so your body can then absorb it.
