What are the building blocks of proteins?
Amino acids
Which functional group is written as NH2?
Amine (amino) group
Which functional group is written as COOH?
Carboxyl group
What type of reaction links amino acids together?
Condensation
What small molecule is eliminated during protein formation?
Water
What is the name of the link formed between amino acids?
Amide (peptide) link
What is the structural formula of a peptide link?
CONH
What determines the structure and function of a protein?
The sequence of amino acids
What are amino acids the body cannot make called?
Essential amino acids
What process breaks proteins into amino acids during digestion?
Hydrolysis
What happens to proteins when they are hydrolysed?
They break down into amino acids
What holds protein chains in spirals or sheets?
Intermolecular forces between side chains
What is the term for proteins changing shape when heated?
Denaturation
What effect does denaturation have on food texture?
It changes the structure and texture
What type of biological molecules are enzymes?
Proteins
Why do protein chains unwind when heated?
Heat breaks hydrogen bonds between side chains.
How can enzymes be detected in foods like liver, potato or celery?
They catalyse the decomposition of hydrogen peroxide, releasing oxygen gas.
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Unit 1-Periodicity12
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Unit 1-Structure And Bonding In Elements9
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Unit 1-Structure And Bonding In Compounds36
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Unit 1-Oxidising And Reducing Agents21
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Unit 1-Glossary1
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Unit 2-Esters, Fats And Oils13
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Unit 2-Proteins17
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Unit 2-Oxidation Of Food17
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Unit 2-Soaps, Detergents And Emulsions13
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Unit 2-Fragrances16
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Unit 2-Skin Care13
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Unit 2-Glossary26
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Unit 3-Getting The Most From Reactants13
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Unit 3-Controlling The Rate14
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Unit 3-Chemical Energy16
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Unit 3-Equilibria16
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Unit 3-Chemical Analysis8
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Unit 3-Glossary1
