1.6 Proteins

Question 1

What are amino acids?

Answer 1

Basic monomer units which combine to make polypeptides

Question 2

What are the 4 chemical groups attached to the C atom of an amino acid?

Answer 2

• amino group ( NH2)
• carboxyl group (COOH)
• H atom
• R side group

Question 3

How is a peptide bond formed?

Answer 3

Combination of a OH from the carboxyl group of one amino acid and a H from the amino group of another amino acid

Question 4

What is polymerisation?

Answer 4

Many amino acid monomers joining together through condensation reactions

Question 5

What is a polypeptide?

Answer 5

Chain of many amino acids

Question 6

What is the primary structure of proteins?

Answer 6

The sequence of amino acids in a polypeptide chain

Question 7

What does the primary structure of a protein determine?

Answer 7

Its ultimate shape and function

Question 8

What is the tertiary structure of proteins?

Answer 8

The 3D shape of a protein

Question 9

What is the quarternary structure of proteins?

Answer 9

Association of protein chains into a closely packed arrangement

Question 10

What is the test for proteins?

Answer 10

• test sample + equal amount of sodium hydroxide
• 0.05% copper sulfate solution; mix
• peptide bonds = purple