GCSE Digestion 1

Biological molecules are important in organisms to ????????????????? and for use in metabolic reactions.

• Build Structures

• Create Energy

• Build Muscle

• Lower Muscle Structure

Large molecules are made when many ??????? ???????? join together.

• big molecules

• smaller molecules

• smaller cells

• big cells

The three main biological molecules are....

• Fats
  Carbohydrates

  Acids

• Carbohydrates

  Fats

  Proteins

• Acids

  Fats

  Proteins

• Proteins

  Acids

  Carbohydrates

Fats are made up of ...

• glycerol and fatty acids

• Glycerol and sugar

• Glycerol and glucose

• glucose and fatty acids

Carbohydrates are made up of ....

• simple acids

• simple fats

• amino acids

• simple sugars

Proteins are made up of .....

• fatty acids

• amino sugars

• amino acids

• glucose

Digestion is the breakdown of large ????????? molecules of food into smaller soluble molecules

• soluble

• insoluble

• important

• cellular

Why is digestion important?

• It ensures food molecules are soluble so that they can be transported in the bloodstream

• it ensures food molecules are insoluble so that they can not be transported in the bloodstream

• It ensures food molecules are soluble so that they can be transported in the air

• it ensures food molecules are insoluble

The smaller, soluble molecules can be used to ????????? larger molecules or used in cellular reactions

• resynthesise

• rewind

• remove

• rotate

The breakdown of food molecules is catalysed (caused) by a range of digestive enzymes, what are the three main types of enzymes?

• Carbohydrases
  Protases
  Lipases

• Carbohydrates
  Protates
  Lipates

• Pancreas

  Stomach
  Intestine

• Carbohydrases
  Pancreas

  Protates