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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.
What types of bonds are present in the water molecule?
covalent and hyrdogen bonds
What is the function of the lacZ gene?
the lacZ gene encodes b-galactosidase, a key enzyme in lactose metabolism. Which lactose is present in the cell, the cell expresses lacZ and metabolizes lactose. source (Matseringbiology.com and campbell biology)
What kind of bonds hold the chains of building blocks together?
hydrogen bonds, disulphide bonds
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 the effect a repressor has on the lac operon when lactose is present?
When lactose is present, the lactose binds to the repressor and changes the shape of the repressor.
The obvious advantage of the lactose operon system is that?
lactose metabolizing enzymes need not be made when lactose is not present.
What is the emulsion present in milk?
lactose and water
What is the definition of lactose?
A sugar present in milk
What is the difference between lactose and galactose?
galactose and lactose is the same galactose is found in the milk of mammals and even lactose is present in the milk of mammals
What kind of chemical bonds present in substances made of carbon atoms linked toget?
Covalent bonding
What kind of sugar is in milk?
Lactose
The lac operon enables a bacterium to build the proteins needed for lactose metabolism only when what is presented?
Only when lactose is present; if glucose is present the cell will metabolize glucose over lactose due to glucose being easier for the cell to metabolize.
What is the function of lac repressor system in E. coli?
It allows lactose to permeate the cell membrane, and then break bonds with glucose and galactose to use the lactose for food.
What types of bonds are present in table sugar?
The type of bonds that are present in table sugar are covalent bonds. Carbon, hydrogen, and oxygen comprise these covalent bonds.
What kind of doctor treats lactose intolerance and ulcers?
A gastroenterologist treats lactose intolerance and ulcers.
Does a fehling test show lactose being present?
yes
