Flashcards in Chapter 5 -3 Deck (15)
What are the 2 types of reactions of energy coupling?
Exergonic & endergonic
energy is released and reactants have more potential energy
require energy input and products have more potential energy
What is the main energy coupling molecule that powers cellular work?
How does ATP power cellular work?
by phosphorylation - transfer of high energy phosphate to some
What makes metabolism efficient?
What are enzymes?
specific type of proteins that function as acatalyic
that accelerate chemical reactions w/o being altered
What are active sites?
a pocket with a specific shape for substrate binding
What is the enzyme cycle?
1. Substrate binds to active site induced fit
2. Transition state produces products
3. Products are released
4. Active site ready for substrate
Enzyme activity is influenced by?
-temp, salt concentration, pH
What are the enzyme helpers?
non protein cofactors, coenzymes
What are cofactors?
metal ions of zinc, iron, etc