Question:
Carbohydrates that produce two to ten monosaccharides units during the hydrolysis are called
Carbohydrates that produce two to ten monosaccharides units during the hydrolysis are called
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Carbohydrate classification by hydrolysis products:
Mono- (1 unit)
Oligo- (2-10 units)
Poly- (>10 units) Aldoses and ketoses refer to the type of carbonyl group in a monosaccharide.
Mono- (1 unit)
Oligo- (2-10 units)
Poly- (>10 units) Aldoses and ketoses refer to the type of carbonyl group in a monosaccharide.
Updated On: Jul 2, 2026
- Oligosaccharides
- Aldoses
- Ketoses
- Polyhydroxy aldehyde
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The Correct Option is A
Approach Solution - 1
Carbohydrates are classified based on the number of simpler sugar units (monosaccharides) they can be broken down into through hydrolysis (reaction with water).
Monosaccharides: The simplest carbohydrates; they cannot be hydrolyzed into smaller sugar units (e.g., glucose, fructose).
Oligosaccharides: Carbohydrates that yield 2 to 10 monosaccharide units upon hydrolysis. This category includes disaccharides (yielding 2 units, like sucrose) and others like trisaccharides (3 units, e.g., raffinose).
Polysaccharides: Carbohydrates that yield many (more than 10, often hundreds or thousands) monosaccharide units upon hydrolysis (e.g., starch, cellulose). The question specifically asks for carbohydrates that produce two to ten monosaccharide units upon hydrolysis. This definition directly matches oligosaccharides. The other options are different classifications:
Aldoses: Monosaccharides containing an aldehyde (-CHO) functional group (e.g., glucose).
Ketoses: Monosaccharides containing a ketone (C=O) functional group (e.g., fructose).
Polyhydroxy aldehyde: This is a chemical description of an aldose – a molecule with multiple hydroxyl (-OH) groups and an aldehyde group. Thus, the correct answer is (1) Oligosaccharides. Oligosaccharides
Monosaccharides: The simplest carbohydrates; they cannot be hydrolyzed into smaller sugar units (e.g., glucose, fructose).
Oligosaccharides: Carbohydrates that yield 2 to 10 monosaccharide units upon hydrolysis. This category includes disaccharides (yielding 2 units, like sucrose) and others like trisaccharides (3 units, e.g., raffinose).
Polysaccharides: Carbohydrates that yield many (more than 10, often hundreds or thousands) monosaccharide units upon hydrolysis (e.g., starch, cellulose). The question specifically asks for carbohydrates that produce two to ten monosaccharide units upon hydrolysis. This definition directly matches oligosaccharides. The other options are different classifications:
Aldoses: Monosaccharides containing an aldehyde (-CHO) functional group (e.g., glucose).
Ketoses: Monosaccharides containing a ketone (C=O) functional group (e.g., fructose).
Polyhydroxy aldehyde: This is a chemical description of an aldose – a molecule with multiple hydroxyl (-OH) groups and an aldehyde group. Thus, the correct answer is (1) Oligosaccharides. Oligosaccharides
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Approach Solution -2
Word-root elimination approach:
The prefix "oligo-" means "few", so oligosaccharides are, by definition, carbohydrates that break down into a few, that is 2 to 10, monosaccharide units on hydrolysis, matching the question exactly. The remaining options describe entirely different classification criteria rather than the number of hydrolysis units: aldoses and ketoses classify single monosaccharides by their functional group (aldehyde vs ketone), and "polyhydroxy aldehyde" is simply a structural description of an aldose. None of these three relate to how many units are produced on hydrolysis, so they can all be ruled out, leaving oligosaccharides as the only fit.
The prefix "oligo-" means "few", so oligosaccharides are, by definition, carbohydrates that break down into a few, that is 2 to 10, monosaccharide units on hydrolysis, matching the question exactly. The remaining options describe entirely different classification criteria rather than the number of hydrolysis units: aldoses and ketoses classify single monosaccharides by their functional group (aldehyde vs ketone), and "polyhydroxy aldehyde" is simply a structural description of an aldose. None of these three relate to how many units are produced on hydrolysis, so they can all be ruled out, leaving oligosaccharides as the only fit.
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