M2 - Proteins

Question 1

What are proteins made of

Answer 1

Amine group
Central hydrogen
Carboxyl group
R group
Hydrogen

Question 2

What are r groups

Answer 2

Variable group (20)
Changes in all 20 different amino acids

Question 3

Primary structure

Answer 3

Sequence of amino acids in a polypeptide chain

Question 4

Secondary structure

Answer 4

Sequences causes parts of molecule to bend in alpha helix or beta pleated sheets
Held together by hydrogen bonds

Question 5

Tertiary structure

Answer 5

Secondary structure folded to form 3D shape
Ionic, hydro interactions, disulfide bonds, hydrogen bonds

Question 6

Quaternary structure

Answer 6

When protein made up of more than one polypeptide chain

Question 7

Fibrous protein

Answer 7

Polypeptide chain long and twisted strands link together
Insoluble in water
Strength gives structural function
Hydrogen bonds form with adjacent chains

Question 8

Globular proteins

Answer 8

Chain rolls up to form spherical shape
Unstable
Soluble
Metabolic functions

Question 9

Example of globular proteins

Answer 9

Haemoglobin
Pepsin - stomach to digest other proteins
Insulin