Multiple choice

The sugars like xylose and ribose are colorless, water-soluble and crystalline solids. They are categorised as:

  1. Mono-saccharides

  2. Oligo-saccharides

  3. Poly-saccharides

  4. di-isaccharides

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A Correct answer
Explanation

Mono-saccharides are the most basic units of biologically important carbohydrates. They are the simplest form of sugar and are usually colourless, water-soluble, crystalline solids. Some mono-saccharides have a sweet taste. Examples of mono-saccharides include glucose (dextrose), fructose (levulose), galactose, xylose and ribose.