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Biology T6 Revision

Biology T6 Revision GCSE Science Ormerod

What is a group of similar cells that work together called? Tissue
Which is bigger: 3 x 10-8 or 3 x 10-16 3x10-8
Which organ system includes the heart? Circulatory system
What role do the teeth play in digestion? Mechanically breaks down food
Name the tube that carries food from the mouth to the stomach? Oesophagus
What is the name of the enzyme secreted by the salivary gland? Amylase
What do the gastric pits in the stomach secrete? Hydrochloric acid and pepsin (gastric juice)
Name the three macromolecules Starch (carbohydrates), protein, lipids (fats)
Which macromolecule is broken down by protease? Protein
Which macromolecule is broken down by lipase? Lipids (fats)
Which macromolecule is broken down by pepsin? Protein
Which macromolecule is broken down by amylase? Starch
Which of the following is not a macromolecule: starch, sugar, protein, fat? Sugar
Which organ secretes protease, lipase and amylase? Pancreas
Why does the small intestine have villi? To increase surface area
What happens to small molecules in the small intestine? They are absorbed into the blood
Define the term ‘catalyst’ A substance that increases the rate of a chemical reaction
Name the part of an enzyme which is involved in reactions Active site
Define the term ‘substrate’ The substance that the enzyme is acting on
What has to match in order for an enzyme to work? The shape of the active site and the shape of the substrate
What is the name of the theory used to describe how enzymes work? Lock and key theory
What does the term ‘denatured’ mean? The structure of an enzyme is changed so that it doesn’t work
What factors might denature an enzyme? pH and temperature
Created by: lesleycollins



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