Biology : asked on shiba8667
 22.01.2023

The test results below indicate the presence of which nutrient? a.monosaccharide b. polysaccharide c. protein d. lipid

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17.02.2022, solved by verified expert
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The right answer is polysaccharides (starch).

The Lugol test is positive !

In both starch and glycogen molecules, glucose units linked by alpha 1-4 osidic bonds form helical chains of amylose, on which short chains of the same constitution branch through alpha 1-6 osidic bonds. In starch, these branches are present about every thirty glucose residues while in glycogen, they are present about every ten residues.

In the presence of iodine, the starch is colored blue-violet while the glycogen is colored mahogany brown.

In the cells, the starch forms grains of paracrystalline structure of a few microns in diameter observable under optical microscope without particular coloration or after staining with diluted Lugol. Their observation with a polarizing microscope is also interesting.

The other reactions are negative.

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Faq

Biology
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P Answered by Specialist

See below

Explanation:

Q1. incomplete information given

Q2. Protein will be present so test tube C. Beef is a rich source of protein. Hence, the Biuret test will be relevant in this case since that is specific to detecting proteins.

Q3. Orange juice has ample amount of simple sugars (such as fructose, glucose), which are monosaccharides. So option A. Benedict test is required here.

Q4. Incomplete information provided

Q5. You need a certain kind of food that is rich in protein and simultaneously lacks fats. Here, skimmed milk is relevant - fat has been removed from the milk although protein is still present.

Biology
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P Answered by Master

See below

Explanation:

Q1. incomplete information given

Q2. Protein will be present so test tube C. Beef is a rich source of protein. Hence, the Biuret test will be relevant in this case since that is specific to detecting proteins.

Q3. Orange juice has ample amount of simple sugars (such as fructose, glucose), which are monosaccharides. So option A. Benedict test is required here.

Q4. Incomplete information provided

Q5. You need a certain kind of food that is rich in protein and simultaneously lacks fats. Here, skimmed milk is relevant - fat has been removed from the milk although protein is still present.

Biology
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P Answered by PhD

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D).increasing the pH with in the cell.

Explaination:

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