JEE Main 20209 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2020
- Date
- 9 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Biomolecules
JEE Main 2020 · 9 January · Evening Shift · Chemistry · Biomolecules
A, B and C are three biomolecules. The results of the tests...
and are three biomolecules. The results of the tests performed on them are given below:
and are respectively:
| Molisch's test | Barfoed Test | Biuret Test | |
|---|---|---|---|
| Positive | Negative | Negative | |
| Positive | Positive | Negative | |
| Negative | Negative | Positive |
and are respectively:
Options
- A Glucose, Fructose Albumin
- B Lactose, Glucose, Albumin
- C Lactose, Glucose, Alanine
- D Lactose, Fructose, Alanine
Correct answer
B. Lactose, Glucose, Albumin
Step-by-step solution
Alanine does not show Biuret test because
Biuret test is used for deduction of peptide
linkage & alanine is amino acid.
Albumine is protein so have paptide linkage
so it gives positive Biuret test.
Positive Barfoed test is shown by
monosaccharide but not disaccharide. Positive
Molisch's test is shown by glucose.
Biuret test is used for deduction of peptide
linkage & alanine is amino acid.
Albumine is protein so have paptide linkage
so it gives positive Biuret test.
Positive Barfoed test is shown by
monosaccharide but not disaccharide. Positive
Molisch's test is shown by glucose.