Would you expect the glucose levels of the lactose solution to change appreciably after the addition of the lactase enzyme? Why? Yes; the lactase enzyme will break down the glucose, lowering the concentration of glucose No; the lactase enzyme will simultaneously break down and produce glucose, leaving the glucose level constant Yes; the lactase enzyme breaks down lactose which would increase the glucose levels No; there is not enough lactose in the solution to show appreciable change in glucose levels
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- When fishing boats pull trawling nets through the water, manyfish avoid being caught by vigorously swimming away. Others,after vigorous escape swimming, get caught, but later arereleased because they are not of legal size or are not the speciesdesired. Fish that escape or are released sometimes die anyway.The accumulation of lactic acid from anaerobic work in such fishseems in certain cases to be a key factor in their deaths. Howcould a large lactic acid accumulation in a fish interfere with itsability to obtain enough O2 to survive?Margarine is made from vegetable oil by a chem-ical process. Do you suppose this process converts satu-rated fatty acids to unsaturated ones, or vice versa? Explainyour answer.If 100% of the free energy from the metabolism of glucose is used for the conversion of ADP to ATP, how manymolecules of ATP can be produced from each gram of glucose (mm = 180.16)?
- In the absence of oxygen, cells consume glucoseat a high, steady rate. When oxygen is added, glucose con-sumption drops precipitously and is then maintained atthe lower rate. Why is glucose consumed at a high rate inthe absence of oxygen and at a low rate in its presence?J. C. Servaites, in Plant Physiol. (1985) 78:839–843, observed that Rubisco from tobacco leaves collected before dawn had a much lower specific activity than the enzyme collected at noon. This difference persisted despite extensive dialysis, gel filtration, or heat treatment. However, precipitation of the predawn enzyme by 50% (NH4)2SO4 restored the specific activity to the level of the noon-collected enzyme. Suggest an explanation.How many moles of each substrate (a-h in the given figure) are formed during the aerobic metabolism of a glucose molecule? and why is that? ty.
- It is being said that our bodies cannot produce lactic acid but rather lactate and it's the metabolite summation of ATP, hydrogen, and lactate that cause the burn. But I was taught that lactic acid does not cause muscle burning sensation but instead its the increase in proton concentration that creates an acidic environment but since lactate is the component measured in the blood and blood is strictly a weak base and lactic acid is the corresponding acid and uses muscles as an energy it can help reduce the acidity. So I'm just confused and would like some clarification if our bodies do have lactic acid and what causes the burning sensation in our muscles when getting a pumpWhen glucose is reduced, only one alditol is produced.When fructose undergoes the same reaction, however,two diasteriomeric sugars are produced. Draw theirstructures.In the lactase enzyme simulation you conducted in Part 1 of this Nutrition Lab, you found that enzyme activity is dependent upon the pH of the environment. Coffee has a pH of approximately 5.0. Suppose you added lactase to a cup of coffee with milk. Would glucose be produced? Addition of lactase to a mixture of coffee and milk would yield ______ glucose than addition of lactase to plain milk. more the same amount of less
- Glucose is converted to pyruvate in glycolysis, yielding a netsynthesis of 2 ATP. In certain cells pyruvate can be reconverted to glucose during gluconeogenesis. How many ATPsare required to convert pyruvate back to glucose?The energy stored in the carbon-carbon bonds of glucose is anexample of _____ energy.a. kineticb. potentialc. chemicald. mechanicale. Both b and c are correct.At the conclusion of anaerobic glycolysis, a metabolite is formed (you should have mentioned this in part g of question 6 above) that is released into the general circulation. Briefly describe this process and the fate of this metabolite. What would be the expected difference in this metabolite between two individuals of differing fitness levels (e.g., one athlete has a higher VO2max than the other) during an exercise test?