proteins

Question 1

primary structure

Answer 1

sequence of amino acids

Question 2

secondary structure

Answer 2

local folding of peptide chains due to hydrogen bonds

Question 3

examples of secondary structure

Answer 3

alpha helix (bend)
beta pleated sheet (pleated)

Question 4

general features of an amino acid

Answer 4

R group (1 of 20)
NH3 (amine group)
COOH (carboxyl group)

Question 5

formula to recognise peptide bond

Answer 5

O=C-N-H

Question 6

how many amino acids exist

Answer 6

20

Question 7

type of bond formed between amino acids + what type of reaction

Answer 7

peptide bonds
condensation

Question 8

tertiary structure

Answer 8

3D structure due to folding

Question 9

types of bonds adding strength in the tertiary structure

Answer 9

hydrogen bonds
ionic bonds
disulphide bridges

Question 10

Quaternary structure

Answer 10

interactions between more than 1 polypeptide chain

Question 11

examples of quaternary structures

Answer 11

collagen
haemoglobin
insulin

Question 12

difference between globular proteins and fibrous proteins

Answer 12

globular = involved in chemical reactions, soluble;
fibrous = have structural roles in biology