Enzyme Function I Flashcards
1
Q
activated carriers
A
- store energy in an easily exchangeable form, either as a readily transferable chemical group or as high-energy electrons
- they can serve a dual role as a source of both energy and chemical groups in biosynthetic reactions
2
Q
coupled reaction
A
- a linked pair of chemical reactions in which free energy released by one reaction serves to drive the other reaction
3
Q
Kᴍ
A
- concentration of substrate at 1/2 Vmax
4
Q
velocity
A
- the speed of something in a given direction
5
Q
ADP
A
- adenosine diphosphate
compound that remains when a phosphate group is removed from ATP - releases energy
- is essential in photosynthesis and glycolysis
- also important during the activation of platelets
6
Q
Michaelis constant
A
- the substrate concentration at which the reaction velocity is 50% of the Vmax
7
Q
phosphorylation
A
- a reaction where a phosphate group is added to ADP
8
Q
turnover number
A
- the number of substrate molecules an enzyme can convert into product per second
9
Q
ATP
A
- adenosine triphosphate
- main energy source that cells use for most of their work
- composed of adenine, ribose, and 3 phosphate groups
10
Q
double reciprocal plot
A
- a graphical representation of enzyme kinetics
11
Q
Michaelis Menton equation
A
- mainly used to characterize the enzymatic rate at different substrate concentrations
12
Q
random walk
A
- as molecules collide and coined off of each other, an individual molecule move different ways, it’s path constitutes a random walk
13
Q
Vmax
A
- the maximum rate of reaction
- a characteristic feature of a specific enzyme at a specific concentration of substrate
14
Q
biosynthesis
A
- an enzyme catalyst process where complex molecules are formed from simple substances
- usually involves key enzymes to catalyze the reaction and energy sources
15
Q
enzyme-substrate complex
A
- a temporary molecule formed when the substrate binds to the enzyme
