1. Loose weight due to less nutrients being absorbed. 2. Reduce activity of protease so less amino acids absorbed as optimum pH is acidic. (Recall role of bile)
Discuss importance of carbon as organic molecule.
Also fructose and galactose. Alpha and beta glucose are isomers (same chemical formula just a different arrangement), beta the hydroxide group is swapped.
Insoluble red precipitate of copper (I) oxide. Sucrose is non-reducing.
Emphasise equal volume, heating and semi-quantitative nature of test.
1. Sufferers of bowel cancer sometimes have to
have part of their small intestines removed to
prevent the cancer from spreading.
Suggest one symptom a person may experience
from this. Give a reason for your answer.
2. Antacids can be taken to treat indigestion.
Antacids work by neutralising excess stomach
acid. Suggest how taking antacids may have an
effect on digestion.
Objective: To understand how
carbohydrates are made up of simple
units know as monosaccharides.
~ Describe what a monosaccharide is
and name examples.
~ Explain how to carry out a test for
Main function in the
Starch, glucose, glycogen
What enzymes help
to digest them?
Monomers and polymers
Carbohydrates are polymers.
An individual molecule is a
monomer in this case a sugar,
Monosaccharides ~ Sweet tasting,
~ e.g. Glucose,
~ Fructose and
• All monosaccharides and some disaccharides are
Reduction reaction involves electrons being gained.
The reducing sugars donate electrons to another
chemical, copper (II) sulphate or Benedict’s
precipitate of copper (I)
Test for reducing sugars
1. Add 2cm³ of
food sample (in
liquid form) to a
2. Then add 2cm³ of
3. Heat mixture in
water bath for
Very low Green
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