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NTA Abhyas NEET2020BotanyTransport in PlantsPractice

Which of the following is reducing and non-reactive sugar?

Options

  1. AGalactose
  2. BGluconic acid
  3. CMethygalactoside
  4. DSucrose

Correct answer

D. Sucrose

Step-by-step solution

A sugar without a hemiacetal is non-reducing because it does not behave as a reducing agent toward oxidizing metal salts. Sucrose is one example of a non-reducing sugar. Different tests can work out whether sugar is reducing or non-reducing, by detecting the presence of free aldehyde or ketone groups. Sucrose is less reactive and more likely to survive the journey in the phloem.

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