Digestion and enzymes | Science | Quizalize & Oak National Academy

Starter quiz

What is digestion?
- The process of moving food through the digestive system.
- The process of breaking down food into nutrients ✓
- The process of releasing energy from food.
Match the nutrient to the food source.
- carbohydrate
  
  ⇔
  
  potatoes ✓
- protein
  
  ⇔
  
  meat ✓
- fat
  
  ⇔
  
  butter ✓
Which is the correct order that food passes through the digestive system?
- stomach, oesophagus, liver, small intestine, large intestine
- mouth, oesophagus, stomach, small intestine, large intestine ✓
- oesophagus, mouth, stomach, large intestine, small intestine
- mouth, oesophagus, stomach, liver, large intestine, small intestine
- oesophagus, mouth, small intestine, liver, large intestine
All the organs involved in digestion make up the __________ which breaks down food and absorbs nutrients.
- 'digestive system' ✓
What is the role of the large intestine?
- absorb water and nutrients
- process waste and absorb water ✓
- digest food
- absorb water and make fibre
Match the digestive glands with their function.
- Salivary gland
  
  ⇔
  
  Secrete digestive chemicals and add water ✓
- Pancreas
  
  ⇔
  
  Secretes digestive chemicals ✓
- Liver
  
  ⇔
  
  Secretes bile ✓

Grinding food, rolling food around by the tongue and churning are all examples of which type of digestion?
- chemical
- mechanical ✓
- by enzymes
True of false? Digestion can turn soluble food into insoluble food.
- True
- False ✓
Which small unit are large carbohydrates like starch broken down into?
- 'sugars' ✓
What are the enzymes that digest proteins called?
- carbohydrases
- proteases ✓
- lipases
Who is right?
- Jun: "Enzymes release energy from chemical reactions."
- Sam: "Enzymes change chemical reactions."
- Laura: "Enzymes speed up chemical reactions." ✓
In the enzyme catalysed reaction, which part is the enzyme? lactose --- lactase ---> glucose + galactose
- lactose
- lactase ✓
- glucose
- galactose

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The differences between mechanical and chemical digestion and where they take place.
Food is made up of carbohydrates, proteins and fats.
Carbohydrates, proteins and fats in food are broken down by digestion into smaller molecules that can be absorbed.
Enzymes are biological molecules that act as catalysts to speed up chemical digestion of carbohydrate, protein and fat.
Enzymes digest carbohydrates into starch and sugars, proteins into amino acids, and fats into fatty acids and glycerol.

Food is absorbed without being digested; or "goodness" from food is what is absorbed.

The lesson explores the roles of mechanical and chemical digestion (by enzymes) of different food types into small molecules to be absorbed.

Digestion - Digestion is the process of breaking down large food molecules into smaller molecules that can be absorbed into the blood.
Enzyme - An enzyme is a biological molecule that is a catalyst that speeds up the rate of a reaction.
Carbohydrate - A carbohydrate is a molecule made of carbon, hydrogen and oxygen, and provides energy.
Protein - A protein is a molecule made of amino acids, and is used for growth and repair.
Fat - A fat is a molecule that is stored and used for energy.