3.4 Flashcards
What do all living beings require?
A constant input of energy
What is the main energy input for living systems?
Sunlight
What do autotrophs capture energy from?
They do so from physical sources, like sunlight, or chemical sources and transform that into usable energy for cells
During energy tranformaitons, is all energy usable?
No, and it’s often lost in heat
What does life require and must not violate?
A highly ordered system and must not violate the laws of thermodynamics
How do cells manage energy storing processes?
Through energy coupling (energy releasing processes drive energy storing processes)
Pathways are what in a biological system?
They’re sequential
Why are sequential reactions better?
Because it allows for a more controlled and effecient transfer of energy
What happens in sequential reactions?
The products of one reaction becomes the reactants of another until the entire reaction is complete
What does energy transfer increase?
It increases the disorder of the universe
Are living organisms at equibilibrium?
No, they have a constant input and output of materials in the cell
