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13 Cards in this Set
- Front
- Back
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What is the difference between physical and chemical digestion?
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Physical Digestion involves physically breaking down food into smaller pieces- teeth/ churning of stomach.
Chemical Digestion invloves hydrolysis by adding water. This is catalysed by digestive enzymes. |
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How does food move from the mouth to the stomach?
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Down the oesophagus using waves of contractions called Peristalsis.
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What are the two parts of the small intestine?
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Duodenum and Ileum.
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Where is amylase found and what does it hydrolysise?
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In the salivary glands and the pancreas. Hydrolyses starch.
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Where is maltase found and what does it hydrolysise?
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In the Ileum. Hydrolyses maltose.
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What is the bond called between to amino acids?
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Peptide Bond.
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Explain the biuret test for proteins.
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1. Needs to be alkaline so add Sodium Hydroxide.
2. Add copper sulphate. If it turns purple then a protein is present if not nthen no protein is present. |
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What is the bond formed between two monosaccharides?
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Glycosidic Bond
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How would you find out if there was a reducing sugar present in a solution?
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Heat the solution and add benedicts reagent. If the sample turns brick red then a reducing sugar is present.
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What colour would a solution containing starch go when iodine is added?
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Blue/Black
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What happens when an enzyme is denatured?
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Important covalent and hydrogen bonds are broken
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What makes enzymes so specific?
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The sequence of amino acids and their tertiary structure.
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How does a competitive inhibitor prevent enzyme activity?
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It binds to the enzyme's active site and so less Enzyme substrate complexes are formed.
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