2.4 Proteins

Question 1

Proteins

Answer 1

Polymer = polypeptides

Monomer = Amino acids

Cacromolecules containing C,O,H,N and sometimes S

Contain amino group and a Carboxyl group

Many amino acids form a polypeptide

Question 2

Non - Polar amino acids

Answer 2

Hydrophobic

Question 3

Polar amino acids

Answer 3

Hydrophylic

Question 4

Acidic amino acids

Answer 4

Negatively charged

Question 5

Basic amino acids

Answer 5

Positively charged

Question 6

How many different amino acids in polypeptides are synthesised on ribosomes

Answer 6

20 different amino acids and polypeptides

Question 7

How are amino acids linked together

Answer 7

With enzymes and condensation reactions to form water

Question 8

Peptide

Answer 8

2 or more amino acids bonded together with a peptide bond

Question 9

Polypeptide

Answer 9

10 or more amino acids bended together with peptide bonds.

Tertiary sector.

Formation determines the function of the protein.

When denatured it is useless, (happens with wrong environment, temp, pH)

Question 10

Structure of an amino acid

Answer 10

HO bind to H to form H2O in a condensation reaction

C bonds to N with a covalent bond

All with presence of an enzyme

Question 11

Proteom

Answer 11

The proteins that determin features of an organism.
every organism has a unique proteom.

(Hair colour)

Question 12

Effects of pH and temp on protein activity

Answer 12

Enzymes have different optimum pH levels

Diagram same for temp

Question 13

Amino acid sequences are determined by…
The amino acid sequence determines…

Answer 13

Amino acid sequences are determined by genes
The amino acid sequence determines the three-dimensional conformation of a protein