- Current section: Introduction
- Learning outcomes
- 1 Proteins
- 1.1 Atoms and molecules
- 1.2 Chemical compounds
- 1.3 The importance of protein
- 1.4 The chemistry of amino acids
- 1 5 Linking amino acids
- 1.6 Protein shapes and functions
- 1.7 Protein digestion and absorption
- 1.8 Summary
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Wednesday 22nd May
- 9:00pm, BBC Two, Bankers - Episode 3
- 9:00pm, BBC Two, Bankers
- 11:05pm, BBC One (North East and Cumbria Only, 955 on Sky), Living with Poverty - The Queen of North Shields
- 11:05pm, BBC One (Yorks and Lincs only, 957 on Sky), Living with Poverty - Peas and pay packets
- 11:05pm, BBC One London, East, North East & Cumbria and Yorkshire & Lincolnshire, Living with Poverty
- 11:05pm, BBC One (London only, 954 on Sky), Living with Poverty - Mind the gap
- 11:05pm, BBC One (Cambridgeshire, East only, 962 on Sky), Living with Poverty - Country kids
- Thursday 23rd May
- Wednesday 22nd May
- Friday 24th May
- Sunday 26th May
- Wednesday 22nd May
This Unit studies 'proteins'. Starting with a simple analysis of the molecular...
This Unit studies 'proteins'. Starting with a simple analysis of the molecular make up, the Unit moves on to look at the importance of protein and how they are digested and absorbed
After studying this unit you should know:
- that the human body, and everything else, is made up of atoms and that there are about 26 different sorts of atom in the human body, combined into numerous different sorts of molecules.
- that amino acids contain carbon, nitrogen, oxygen and hydrogen atoms, some contain an atom of sulphur and that there are about 20 different amino acids, with different side-chains (R groups).
- Amino acids are linked via peptide bonds to make polypeptides and proteins.
- that each protein molecule can be hundreds of amino acids long and the amino acids must be joined in a precise order, which is specified by a code in the DNA in the chromosomes.
- the side-chains (R groups) of the amino acids can interact with one another to fold the protein into a particular shape which is essential for the protein to function correctly.
- when protein food is eaten, the amino acids are released by the activity of peptidase enzymes during digestion. The amino acids are then absorbed into the blood and used to build up the body’s own proteins.
- the amount of protein needed in a balanced diet differs according to age and gender. Insufficient or excess protein in the diet can cause health problems.
This unit studies 'proteins'. Starting with a simple analysis of their molecular make up, the unit moves on to look at the importance of proteins and how they are digested and absorbed.
This unit is an adapted extract from the Open University course
Copyright & revisions
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