Biochem processes Flashcards
Bio chem processes
Chemical processes occurring in cells which results in products needed by cell. most from chains and cycles of biochemical reactions with each step controlled by enzyme
metabolism
Sum of all biochemical reactions and can be divided in 2
Anabolic
Synthesis of complex molecules and usually requires energy to form more chemical bonds
Catabolic
breakdown of complex molecules into simpler and usually releases energy
For cells to continue functioning
enough energy must be provided to maintain the process of getting products from reactants. To achieve this, chem reactions in cells in a series of steps called bio chem processes
Internal cellular membrane and biocproc
The cell has membrane-bound organelles creating specialized microenvironments for specific functions or processes. Membrane-bound structures also concentrate reactants and store them. Some increase their internal sa by having internal membranes folded and stacked
Enzyme
A biological catalyst speeds up chem reactions without undergoing change itself. Lowers the activation energy
Do metabolic processes occur randomly?
No, controlled to maintain cell functions and meet the energy needs of the cell
Intracellular v extracellular enzymes
Intra work in the cell and extra although produced in the cell catalyse things outside of the cell
Exergonic Reactions
A reaction releasing energy. The total net amount of energy released from bonds and products have less energy than reactants
Endergonic
reaction requiring energy. A total net amount of energy is absorbed and stored in bonds of products that have more energy than reactants
Energy from catabolic
Shuttled into anabolic reactions
The BIOCHEM process occurs when
Chemical bonds of reactants are broken and atoms recombine to form new substances
The activation energy
Min amount of energy required to start a chemical reaction is supplied form heat energy that reactants absorb
How enzymes lower activation energy
They don’t give energy but weaken bonds to speed up reactions and destabilise existing chem bonds
