Protein structure and function

Question 1

Haemoglobin

Answer 1

Trasnports oxygen in blood

Question 2

Alpha amylase

Answer 2

Breaks down starch within saliva

Question 3

Collagen

Answer 3

Builds structures in mucsle and skin

Question 4

Membrane bound ATP synthase

Answer 4

Lines inner membrane

Question 5

DNA helicase & RNA polymerase

Answer 5

assist in transcription

Question 6

trna

Answer 6

assist in translation

Question 7

Amino acids components

Answer 7

Side chains dictate properties
Made of carbon, oxygen, hydrogen, nitrogen

Question 8

Non polar amino acids

Answer 8

Hydrophobic properties

Question 9

Polar amino acids

Answer 9

Hydrophilic properties

Question 10

Primary protein structure

Answer 10

Sequence of amino acids - Polypeptide chain reading from N to C terminus

Question 11

Residue

Answer 11

Monermic unit of polypeptide - Lyseine

Question 12

Secondary structure

Answer 12

Amino acid sequence undergone localised folding held together by hydrogen bonds - Alpha and Beta

Question 13

Alpha helix

Answer 13

Backbones form sprials with four amino acids per turn - Secondary structure

Question 14

Beta sheets

Answer 14

One backbone faces one way, and u turns into opposite direction

Question 15

Tertiary structure

Answer 15

Organised folding of protien with hydrophobic residues pointing inward and hydrophilic pointing out - Forms 3d structure of protien

Question 16

Globular protiens structure

Answer 16

Tight, compact round blob

Question 17

Fibrous protiens structure

Answer 17

Long, elongated and spindly

Question 18

Quaternary structure

Answer 18

Mulitple polypeptide chains bonded together

Question 19

Inhibitors

Answer 19

Prevent susbtrate entering enymes active site

Question 20

Hydrogen bonds

Answer 20

Form backbone of protiens and folding
Weak bond but many

Question 21

Electrostatic interactions

Answer 21

Salt/ionic bridge between two oppositely charged groups

Question 22

Hydrophobic interaction

Answer 22

Clustering of polar and hydrophobic side chains away from water
weakest bond but most plentiful

Question 23

Covalent bond

Answer 23

Strongest bond that occyrs spontaneously in oxidising conditions - Disulphide bond

Question 24

Denaturation factors

Answer 24

ph
salt conc
temperature

Question 25

Heat denaturation

Answer 25

Health makes protiens insoluble making them unravel and lose shape or form random bonds

Question 26

Salt denaturation

Answer 26

Salt binding to a charged side chain can break electrostatic interactions