GCSE Biology (AQA)

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Carbohydrates & Carbohydrases

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Organisation Animal Tissues, Organs and Organ Systems

Carbohydrates & Carbohydrases

2:25 Digestive Enzymes in Detail
Spec 4.2.2.1
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  • Carbohydrates are large molecules composed of simple sugars.
  • Simple sugars are carbohydrates with one or two sugar molecules.
  • Foods high in carbohydrates include bread, pasta, and starchy vegetables like potatoes.
  • Carbohydrates in foods are broken down into simple sugars by digestive enzymes.
  • The process involves using a carbohydrate enzyme, such as amylase, to break down starch into glucose.
  • Amylase is a key digestive enzyme, important to highlight for exams.
  • Simple word equations are sufficient for exams, without needing chemical symbol equations.
  • Amylase is produced in the saliva glands and pancreas.
  • The saliva glands are located towards the back of the mouth and underneath the tongue.
  • The pancreas produces digestive enzymes that are released into the small intestine.
  • It's important to know the sites of production and action of amylase.
  • Once amylase breaks down starch into glucose, the glucose is used in cellular respiration.
  • Respiration is crucial for producing molecules necessary for an organism's survival.
  • Simple sugars can be reassembled into new carbohydrates by synthesis enzymes in the body.
  • The use of simple sugars for respiration and synthesis is linked to metabolism.

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