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AS LEVEL - TEST FOR BIOLOGICAL MOLECULES - REVIE ...
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A solution turned blue in biuret test, cloudy white in ethanol emulsion test, and blue-black in starch test. Which bonds can be found in the molecules that are in the solution? [glycosidic, peptide, hydrogen bonds, disulfide, ester]
glycosidic & ester bonds only
1 g of table sugar was dissolved in 2 ml distilled water. Then 2 ml of benedict's solution was added to the sample. The sample was boiled in a water bath for 5 minutes. Will the sample be positive for reducing sugar? Yes or No
NO!
A student suspects that he can find carbohydrates in his blood sample. He tested it for iodine test and benedict's test. What will be the results? (negative or positive)
iodine test - negative, benedict's test - positive
Amylase enzyme was added to fried French fries. After 10 minutes it was tested for biomolecules. State the results (+ or -) in benedict's, biuret, and ethanol test.
benedict's - positive, biuret - positive, ethanol - positive
CHOOSE THE CORRECT ANSWER.
B
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B
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A
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A
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D
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C
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D
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C
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CHOOSE THE CORRECT ANSWER.
C
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