Chemistry for Biologists

Proteins

1. Which word best describes proteins that are enzymes and immunoglobins:
linear
coiled
globular
pleated
2. Proteins that have a quaternary structure have:
a protein and a nucleic acid bonded together
two or more proteins bonded together
a protein and a lipid bonded together
a protein and a carbohydrate bonded together
3. Which of the following types of bond is not present within or between protein molecules:
ionic bonds
covalent bonds between sulphur atoms
covalent bonds between oxygen atoms
hydrogen bonds
4. Proteins are broken down into their amino acids by:
an addition reaction
a polymerisation reaction
a decomposition reaction
a hydrolysis reaction
5. The sequence of amino acids in a protein is called its:
secondary structure
tertiary structure
quaternary structure
primary structure
6. The type of bond holding the amino acid units together in a dipeptide molecule is called:
a glycosidic bond
a protein bond
an ester bond
a peptide bond
7. 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
8. Essential amino acids can be:
made from non-essential amino acids
obtained by eating the correct food
made from amines
made in the body
9. All amino acids have the following pair of functional groups:
carboxylic acid and an amine
amine and an ester
amine and alcohol
alcohol and carboxylic acid

 

RSC