proteins

Question 1

the variety of protein shapes arises from

Answer 1

the sequence of amino acids

Question 2

the shape of protein molecules affects

Answer 2

their function

Question 3

functions of proteins include

Answer 3

structural, enzymes, antibodies, receptors, hormones

Question 4

structural proteins make up

Answer 4

cell structures e.g. cell membranes

Question 5

enzymes function as

Answer 5

biological catalysts

Question 6

enzymes are made by

Answer 6

all living cells

Question 7

hormones act as

Answer 7

chemical messengers between cells

Question 8

hormones travel in

Answer 8

body fluids e.g. blood

Question 9

antibodies are

Answer 9

protein molecules

Question 10

antibodies are involved in

Answer 10

body defences

Question 11

receptors are found in

Answer 11

cell membranes

Question 12

what do receptors do

Answer 12

recognise specific substances

Question 13

enzymes speed up..

Answer 13

cellular reactions

Question 14

enzymes remain

Answer 14

unchanged in cellular reactions

Question 15

enzymes act upon a substance called

Answer 15

it’s substrate

Question 16

the substance formed when an enzyme acts upon it’s substrate is called

Answer 16

the product

Question 17

enzymes are involved in …………. and ……….. reactions

Answer 17

degradation and synthesis

Question 18

degradation reactions are when

Answer 18

complex substrates are broken down into 2 products

Question 19

synthesis reactions are when

Answer 19

2 substrates join together to form 1 product

Question 20

enzyme molecules have active sites where they

Answer 20

bind to substrate molecules and form an enzyme-substrate complex

Question 21

enzymes are

Answer 21

specific

Question 22

an enzymes ………….. ……shape is complemtary to the shape of its ………………..

Answer 22

active site, substrate

Question 23

enzymes are most active in their

Answer 23

optimum conditions

Question 24

enzymes are affected by

Answer 24

temperature and pH

Question 25

extremes of temperature or pH can result in changes to the molecular shape of the enzyme known as

Answer 25

denaturation

Question 26

when an enzyme is denatured, the shape of its active site will

Answer 26

no longer match the shape of it’s substrate

Question 27

a change in the molecular shape of an enzyme will affect it’s

Answer 27

rate of reaction

Question 28

a change in the molecular shape of any protein will affect it’s

Answer 28

function