Enzymology Flashcards
What are metabolic pathways
Sequence of chemical reactions where the product of one reaction serves as a substrate for the next
What two ways does the body store energy
Kinetic- energy at work
Potential- stored energy
What is a living system’s free energy
Energy that can do work under cellular conditions
What is anabolism
Involves the synthesis of larger molecules from smaller ones
Requires energy
What is catabolism
Involves the breakdown of larger molecules to smaller ones
releases energy
5 Important electron carriers
Flavoporteins Cytochromes Copper atoms in inner mitochondrial membrane Ubiquinone Iron-sulphur proteins
how much energy is released in the hydrolysis of each bond in ATP
7.3Kcal
6 main classes of enzyme
Transferases Ligases Oxidoreductases Isomerases Hydrolases Lyases
What do tranferases do
transfer functional groups between molecules
what do ligases do
join two molecules together
what do oxidoreductases do
move electrons between molecules
what do isomerases do
convert a molecules form one isomer to another
what do Hydrolases do
break bonds using water
what do lyases do
Break bonds without using water or oxidation
Describe enzymes and their function
Globular proteins with specific shapes control rates of metabolic reactions lower Ea needed to start reactions Not consumed in chemical reactions Substrate specific Shape of active site determines
