Lecture 5 - Enzymes
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12 Terms
Autotrophs
Organisms that feed themselves
Heterotrophs
Organisms that are fed by others
Energy
The ability to do work
Work
the application of force over a distance
Thermodynamics
the branch of chemistry concerned with energy changes
1st law of thermodynamics
energy can neither be created nor destroyed
2nd law of thermodynamics
some energy becomes unavailable for work during energy transfers
Cellular respiration
The process by which cells harvest energy
What do enzymes do?
Increase efficiency of cellular work
Activation energy
the energy needed to initiate chemical reactions
Catalysts
put stress on chemical bonds or brings two substrates closer together to lower upfront energy investment
what kind of macromolecule are enzymes?
Proteins