Proteins

Which word best describes proteins that are enzymes and immunoglobins:

Proteins that have a quaternary structure have:

	a protein and a lipid bonded together
	two or more proteins bonded together
	a protein and a nucleic acid bonded together
	a protein and a carbohydrate bonded together

The type of bond holding the amino acid units together in a dipeptide molecule is called:

Proteins are broken down into their amino acids by:

The sequence of amino acids in a protein is called its:

Which of the following types of bond is not present within or between protein molecules:

	covalent bonds between sulphur atoms
	covalent bonds between oxygen atoms
	ionic bonds
	hydrogen bonds

All amino acids have the following pair of functional groups:

Two amino acid molecules combine to form a dipeptide molecule. The reaction that occurs is:

Essential amino acids can be:

	made in the body
	obtained by eating the correct food
	made from amines
	made from non-essential amino acids