Proteins

Question 1

Classes of amino acids (7)

Answer 1

Aliphatic 
Aromatic
Sulphur containing amino acids
Acidic 
Basic 
Polar
Miscellaneous

Question 2

Primary structure

Answer 2

Amino acid sequence

Question 3

Secondary structure

Answer 3

Hydrogen bonding. 3D spatial arrangement of amino acids. Alpha helix and beta sheets

Question 4

Tertiary structure

Answer 4

R groups interacting with each other folding

Question 5

Quartenary structure

Answer 5

Polypeptide chains come together

Question 6

Glycoproteins

Answer 6

More than 1 carbohydrate molecule covalently attached

Question 7

Oligosaccharide

Answer 7

A few carbohydrate molecules exist together within a chain

Question 8

Conjugated proteins

Answer 8

Proteins after co or post translational modification. Glycoproteins, lipoproteins, metalloproteins

Question 9

Lipoproteins

Answer 9

Proteins combined with lipids. Found in cell membranes and transport hydrophobic molecules eg cholesterol in the blood

Question 10

Metalloproteins

Answer 10

Protein molecules with metal ions in their structure. Various functions like enzyme hormone etc eg haemoglobin

Question 11

Sickle cell anaemia

Answer 11

When the base changes so the beta chain is expressed differently (pro, val and glu Instead of pro glu glu) this gives it the sickle shape and makes it hard to get through capillaries

Question 12

Globular proteins are for

Answer 12

Storage, enzymes, hormones, transporters, structural

Question 13

Tissues where fibrous proteins are commonly found

Answer 13

Muscle fibres and connective tissues

Question 14

Problems in fibrous proteins

Answer 14

Different amino acid sequence resulting in weak collagen being produced
Vitamin C needed for collagen

Question 15

Membranous proteins types

Answer 15

Membrane transporter, membrane enzymes, cell adhesion molecule