NEET Biology: Carbohydrates Practice Questions
13 free multiple-choice questions on Carbohydrates for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more Carbohydrates questions in the app →Q1. Sucrose, a common table sugar, is an example of which type of carbohydrate?
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Correct answer: C — Disaccharide
Sucrose is formed by the linkage of two monosaccharide units (glucose and fructose), making it a disaccharide.
Q2. Sucrose is a disaccharide formed by the linkage of which two monosaccharides?
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Correct answer: A — Glucose and Fructose
Sucrose is a disaccharide formed from the covalent linkage of one molecule of glucose and one molecule of fructose.
Q3. Fructose is an example of which type of monosaccharide?
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Correct answer: A — Ketose
Fructose is a ketohexose, meaning it is a ketose and has six carbon atoms.
Q4. Which classification of carbohydrates consists of a single sugar unit?
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Correct answer: B — Monosaccharides
Monosaccharides are the simplest form of carbohydrates, consisting of a single sugar unit (e.g., glucose, fructose).
Q5. Which class of monosaccharides contains a ketone functional group in its open-chain form?
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Correct answer: D — Ketoses
Ketoses are monosaccharides that possess a ketone functional group in their open-chain form, distinguishing them from aldoses which possess an aldehyde group.
Q6. Which of the following functional groups defines an aldose sugar?
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Correct answer: B — An aldehyde group
Aldoses are monosaccharides that contain an aldehyde functional group (R-CHO).
Q7. Which relationship is correctly defined between monosaccharides and polysaccharides?
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Correct answer: A — Monosaccharides are the basic building blocks of polysaccharides.
Monosaccharides (like glucose) serve as the fundamental monomer units that link together to form complex carbohydrates known as polysaccharides (like starch or cellulose).
Q8. Which molecule is an example of an oligosaccharide?
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Correct answer: A — Sucrose
Oligosaccharides are carbohydrates composed of more than one monosaccharide unit. Sucrose is a disaccharide (formed by glucose and fructose), making it an oligosaccharide.
Q9. Aldoses are generally more readily oxidized than ketoses in aqueous solution because:
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Correct answer: C — The aldehyde group is more easily oxidized to a carboxyl group.
The aldehyde group in aldoses is more readily oxidized (more easily loses electrons) to form a carboxyl group than the ketone group in ketoses.
Q10. Ketoses are characterized by the presence of which functional group in their open-chain form?
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Correct answer: C — Ketone
Ketoses are monosaccharides that possess a ketone functional group (C=O) in their structure, distinguishing them from aldoses which have an aldehyde group.
Q11. Which of the following is a pentose sugar?
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Correct answer: D — Ribose
Pentose sugars are monosaccharides that have five carbon atoms, such as ribose and deoxyribose.
Q12. Which of the following monosaccharides is an aldose?
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Correct answer: D — Glucose
Aldoses are monosaccharides containing an aldehyde functional group. Glucose, ribose, and aldonic acids are examples of aldoses. Fructose is a ketose, and sucrose is a disaccharide.
Q13. Which type of carbohydrate is primarily known as a polysaccharide?
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Correct answer: B — Starch
Polysaccharides are complex carbohydrates made up of many monosaccharide units linked together (e.g., starch, glycogen).
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