Proteins

Question 1

What is the most abundant biological molecule

Answer 1

Protein

Question 2

Define enzymes

Answer 2

Biomolecule, either protein or RNA, that catalyses a specific chemical reaction

Question 3

Name 8 types of proteins

Answer 3

Enzyme, Transport, Storage/Nutrient, Motile, Defence, Regulatory, Specialised, Structural

Question 4

Examples of transport protein

Answer 4

Myoglobin and Haemoglobin - transport O2
Lipoproteins - carry lipids
Cell membrane proteins

Question 5

Nutrient and storage proteins

Answer 5

Plant seeds
Ovalbumin (egg white) and Caesin (milk)
Ferritin - stores non nutrient molecules

Question 6

Motile and contractile proteins examples

Answer 6

Actin and Myosin - movement of skeletal muscle

Tubular microtubules - flagella and cilia

Question 7

Structural proteins example

Answer 7

Collagen
Elastin
Keratin

Question 8

Defence proteins examples

Answer 8

Immunoglobulin
Fibrogen + thrombin - prevents blood loss
Snake venoms, bacterial toxins

Question 9

Regulatory proteins examples

Answer 9

Insulin

Repressors

Question 10

Specialised proteins

Answer 10

Antifreeze found in Antarctic fish to prevent blood from freezing

Question 11

Define a protein

Answer 11

Macromolecules composed of one or more polypeptide chains, each with a characteristic sequence of amino acids linked by peptide bonds