Chemistry for Biologists

Proteins

1. 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
2. Which word best describes proteins that are enzymes and immunoglobins:
coiled
pleated
linear
globular
3. 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
4. The sequence of amino acids in a protein is called its:
tertiary structure
quaternary structure
primary structure
secondary structure
5. Proteins are broken down into their amino acids by:
an addition reaction
a polymerisation reaction
a decomposition reaction
a hydrolysis reaction
6. The type of bond holding the amino acid units together in a dipeptide molecule is called:
a glycosidic bond
a protein bond
a peptide bond
an ester bond
7. Essential amino acids can be:
made in the body
obtained by eating the correct food
made from amines
made from non-essential amino acids
8. Two amino acid molecules combine to form a dipeptide molecule. The reaction that occurs is:
an oxidation reaction
a condensation reaction
a hydrolysis reaction
an esterification reaction
9. All amino acids have the following pair of functional groups:
amine and an ester
carboxylic acid and an amine
alcohol and carboxylic acid
amine and alcohol

 

RSC