B1.2 - Proteins

Question 1

functional groups of amino acids

Answer 1

amine group (NH2)
carboxyl group (COOH)

Question 2

condensation reaction of amino acids to from peptides

Answer 2

amino acid 1 + amino acid 2 = dipeptide + water

Question 3

how many amino acids are there

Answer 3

20

Question 4

how many amino acids can human produce

Answer 4

11

Question 5

protein synthesis process

Answer 5

DNA to RNA to polypeptide

Question 6

role of DNA in protein synthesis

Answer 6

codes for polypeptide

Question 7

role of RNA in protein synthesis

Answer 7

acts as temporary code messenger

Question 8

what determines sequence of amino acids

Answer 8

DNA

Question 9

proteone

Answer 9

set of proteins made by an organism

Question 10

examples of polypeptides (7)

Answer 10

insulin
amylase
keratin
collagen
haemoglobin
titin
lipase

Question 11

haemoglobin

Answer 11

oxygen carrying protein in blood

Question 12

insulin

Answer 12

regulates blood sugar

Question 13

keratin

Answer 13

found in hair, nails, claws, hooves

Question 14

lipase

Answer 14

digestive enzyme

Question 15

histones

Answer 15

protein in nucleus produces chromatin & chromosomes

Question 16

collagen

Answer 16

found in connective tissue (muscles)

Question 17

effect of pH & temperature on enzymes and proteins

Answer 17

denaturation

Question 18

denaturation

Answer 18

permanent change in 3D structure of proteins (from soluble to insoluble)

Question 19

effect of heat on amino acids

Answer 19

breaks bonds between amino acid & R groups

Question 20

effect of pH

Answer 20

higher or lower than optimum breaks bonds & causes damage