Carbohydrates: Structure and Classification
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Questions and Answers

What are carbohydrates?

Organic biomolecules abundantly distributed in animals and plants.

Monosaccharides are carbohydrates which cannot be hydrolyzed into more simple ______.

sugars

Which of the following lists the classifications of carbohydrates?

  • Monosaccharides, Disaccharides
  • Oligosaccharides, Polysaccharides
  • All of the above (correct)
  • None of the above

All polysaccharides yield similar monosaccharide units upon hydrolysis.

<p>False (B)</p> Signup and view all the answers

What is the general formula for a monosaccharide?

<p>[CnH2nOn]</p> Signup and view all the answers

What type of carbohydrate yields two monosaccharide molecules upon hydrolysis?

<p>Disaccharides (D)</p> Signup and view all the answers

What are the two types of polysaccharides based on the nature of hydrolytic products?

<p>Homopolysaccharides and Heteropolysaccharides</p> Signup and view all the answers

The word ‘saccharide’ is derived from the Greek word ______, which means ‘sugar’ or ‘sweet.’

<p>sakkharon</p> Signup and view all the answers

Flashcards

Monosaccharides

Carbohydrates that cannot be broken down into simpler sugars through hydrolysis.

Carbohydrates

Organic molecules found in plants and animals.

Disaccharides

Carbohydrates that yield two monosaccharides upon hydrolysis.

General Monosaccharide Formula

CnH2nOn

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Polysaccharide Hydrolysis

Yields similar monosaccharides, but NOT always.

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Homopolysaccharides

Polysaccharides with similar monosaccharide units.

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Heteropolysaccharides

Polysaccharides with different monosaccharide units.

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Meaning of 'Saccharide'

Derived from the Greek word 'sakkharon', meaning 'sugar'.

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Study Notes

Definition

  • Carbohydrates are organic compounds made up of polyhydroxy aldehydes or ketones.
  • They are also described as compounds that yield polyhydroxy aldehydes and ketones upon hydrolysis.

Classification

  • Monosaccharides are simple sugars that cannot be hydrolyzed into simpler sugars.
  • Disaccharides are carbohydrates that yield two molecules of similar or dissimilar monosaccharides upon hydrolysis.
  • Oligosaccharides yield three to ten monosaccharides units upon hydrolysis.
  • Polysaccharides yield more than ten monosaccharide units upon hydrolysis. They are also known as glycans.

Characteristics of Monosaccharides

  • Monosaccharides have a molecular formula of CnH2nOn, where 'n' represents the number of carbon atoms.
  • Monosaccharides containing an aldehyde group (-CHO) are called aldoses.
  • Monosaccharides containing a ketone group (-CO) are called ketoses.

Biologically Important Carbohydrates

  • Plants synthesize carbohydrates through photosynthesis, storing energy in the form of glucose.
  • In animals, excess glucose is converted into glycogen for long-term energy storage.
  • Specific carbohydrates like ribose, lactose, and galactose are structural components of nucleic acids, lipids, and breast milk.

Classification of Mucopolysaccharides

  • Homopolysaccharides yield similar monosaccharide units upon hydrolysis. Examples include starch, glycogen, inulin, and cellulose.
  • Heteropolysaccharides yield dissimilar monosaccharide units upon hydrolysis. Examples include hyaluronic acid, heparin, chondroitin sulfate, and keratan sulfate.

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Description

Explore the world of carbohydrates in this quiz. Learn about the different classifications such as monosaccharides, disaccharides, oligosaccharides, and polysaccharides, including their characteristics and biological significance. Test your knowledge on how these organic compounds are structured and function in living organisms.

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