enzymes

Question 1

define catalysts

Answer 1

a substances that increases the rate of a chemical reaction and is not changed by the reaction

Question 2

define enzymes

Answer 2

proteins that act as biological catalysts who speed up the rate of chemical reactions and are not changed by the reaction

Question 3

enzymes are important because

Answer 3

without them, the reactions of metabolism would not be fast enough to sustain life

Question 4

enzyme action

Answer 4

the substrate binds to the complementary active site forming enzyme-substrate complex

Question 5

optimum temperature

Answer 5

the temperature at which an enzyme works best

Question 6

optimum pH

Answer 6

is the pH at which an enzyme works best

Question 7

effect of increased temperature of enzymes

Answer 7

increases kinetic energy of particles, active site and enzyme collide more increasing successful collision as enzyme-substrate complex formation increases, so rate of reaction increases

Question 8

excessive heat on enzymes

Answer 8

causes the atoms of enzymes to change position thus changing shape of the active site and substrate can no longer bind to it (denaturation)

Question 9

high pH on enzymes

Answer 9

changes shape of the active site and can’t form enzyme-substrate complex (denaturation)

Question 10

lock and key hypothesis

Answer 10

substrates have a complementary shape to the active site of the enzyme like a lock and key