types of proteins- lqc 1b

Question 1

conjugated protein structure

Answer 1

Proteins with a non-protein group associated with their polypeptide chain/s.

Question 2

examples of conjugated proteins

Answer 2

glycoproteins, lipoproteins, haemoglobin

Question 3

function of glycoproteins

Answer 3

act as receptors
on cell membranes

Question 4

function of lipoproteins

Answer 4

transport cholesterol

Question 5

functions of haemoglobin

Answer 5

binds oxygen in red blood cells

Question 6

structure of fibrous proteins

Answer 6

Polypeptide chain/s made up of many amino acids remain
elongated, Little or no tertiary structure, Has repetitive sequences of amino acids, Has hydrophobic
amino acids/R groups on outside

Question 7

examples of fibrous proteins

Answer 7

collagen, fibrin, keratin

Question 8

function of collagen

Answer 8

strengthens the walls of arteries and veins

Question 9

function of fibrin

Answer 9

forms the insoluble mesh which traps red blood cells and platelets, forming a blood clot

Question 10

function of keratin

Answer 10

in hair/nails/horns

Question 11

structure of globular protein

Answer 11

Polypeptide chain/s made of many amino acids are folded into a spherical shape, Has tertiary structure (and some may have quaternary structure), Does not have repetitive sequences of amino acids, Has hydrophilic amino acids/R groups on outside and hydrophobic groups inside

Question 12

examples of globular proteins

Answer 12

enzymes, thrombin, fibrinogen, prothrombin, haemoglobin

Question 13

function of enzymes

Answer 13

increase the rate of chemical reactions in cells

Question 14

function of thrombin

Answer 14

an enzyme which converts fibrinogen into fibrin

Question 15

function of fibrinogen and prothrombin

Answer 15

plasma proteins needed for the blood clotting process

Question 16

function of haemoglobin

Answer 16

binds oxygen