Lecture 7

Question 1

enzymes can increase the rate of reactions without increasing the

Answer 1

temperature

Question 2

what does the michaelis menten constant represent

Answer 2

concentration of a substrate that is found in an occurring rxn when the rxn is at one hald its maximum valocity

Question 3

factors affecting enzymes

Answer 3

substrate concentration
pH
temperature
coenzymes/cofactors
inhibitors

Question 4

enzyme classes

Answer 4

hydrolases
oxireductates
transferases
isomerases
lyases
ligases

Question 5

hydrolases

Answer 5

catalyze the hydrolysis of a chemcial bond, e.g. proteases

Question 6

oxidoreductases

Answer 6

catalyze the transfer of electrons from one molecule to another

Question 7

transferases

Answer 7

catalyze the transfer of a functional group from one molecule to another

Question 8

kinases belong to which family

Answer 8

phosphotransferases

Question 9

which two hormones stimulate glycogen degradation

Answer 9

epinephrine and glucagon

Question 10

what do epi and glucagon trigger to lead to the shut down of glycogen synthesis

Answer 10

cAMP

Question 11

pathway of glucagon and epi

Answer 11

glucagon and epi -> cAMP -> phosphorylates glycogen synthase b -> glycogen degradation

Question 12

isomerases

Answer 12

catalyze the strucutral rearrangement of isomers

Question 13

lyases

Answer 13

catalyze the breaking of double bonds forming double bonds or ring structures

Question 14

ligases

Answer 14

catalyze joining of two molecules by forming a new chemical bond

Question 15

what lowers the activation energy of an emzyme-substrate interaction

Answer 15

the bonds of the substrate are stretched to make the reaction easier