1. Sucrose (cane sugar) doesn't react with Benedict's solution.
2. Sucrose molecules consist of a pair of molecules joined together.
3. Sucrose can be split into two smaller molecules by the process of hydrolysis.
4. Each of these smaller molecules will react with Benedict's solution.
5. Hydrolysis can be carried out by heating a solution of sucrose with dilute hydrochloric acid.
6. An enzyme will also carry out the hydrolysis, at a lower temperature.
7. Benedict's solution can react only in alkaline solution.
8. Sodium hydrogencarbonate can be used to neutralise dilute hydrochloric acid.
You are provided with a solution that contains only sucrose.
(a) Using the above information and ur own experience of food testing, describe and explain how you would demonstrate that the solution contained sucrose but didn't initially contain glucose. Practical details shud be given. Use the following headings:
(i) to show the absence of glucose in the original solution
......................................................................................................
(ii) hydrolysis of the sucrose solution
......................................................................................................
(iii) the final test to prove the presence of sucrose in the original solution
......................................................................................................
(b) Both sucrose and glucose are good sources of energy.
The enzymes that digests sucrose is found in the small intestine.
There is no enzyme for the digestion of glucose.
What do these facts suggest about the absorption of molecules of these two compounds from the intestine??
2. Sucrose molecules consist of a pair of molecules joined together.
3. Sucrose can be split into two smaller molecules by the process of hydrolysis.
4. Each of these smaller molecules will react with Benedict's solution.
5. Hydrolysis can be carried out by heating a solution of sucrose with dilute hydrochloric acid.
6. An enzyme will also carry out the hydrolysis, at a lower temperature.
7. Benedict's solution can react only in alkaline solution.
8. Sodium hydrogencarbonate can be used to neutralise dilute hydrochloric acid.
You are provided with a solution that contains only sucrose.
(a) Using the above information and ur own experience of food testing, describe and explain how you would demonstrate that the solution contained sucrose but didn't initially contain glucose. Practical details shud be given. Use the following headings:
(i) to show the absence of glucose in the original solution
......................................................................................................
(ii) hydrolysis of the sucrose solution
......................................................................................................
(iii) the final test to prove the presence of sucrose in the original solution
......................................................................................................
(b) Both sucrose and glucose are good sources of energy.
The enzymes that digests sucrose is found in the small intestine.
There is no enzyme for the digestion of glucose.
What do these facts suggest about the absorption of molecules of these two compounds from the intestine??