Biological Molecules HARD PPQs

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Explain why amylase produced in the human digestive system does not digest GOS

  1. Active site only complementary to starch / not complementary to GOS

  2. due to tertiary structure

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Prebiotics are foods used to promote good health in humans.
Prebiotics stimulate the growth of 'healthy' bacterial populations in the human digestive system.
The bacteria in these 'healthy' populations produce enzymes that hydrolyse GOS.

Suggest how GOS can work as a prebiotic.

  1. provides galactose

  2. bacteria use galactose for respiration

  3. bacteria use galactose for binary fission 

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