BIOL201 Ch7.1 | Energy in Living Systems

Biology 201 Lecture Video Covering Chapter 7.1 of OpenStax Biology Summary:
Cellular respiration involves several biochemical pathways, each removing small amounts of energy from glucose. 

Redox reactions involve the transfer of electrons from one substance to another 
Loss of Electrons = Oxidation 
Gain of Electrons = Reduction 

Electrons can be thought of as energy 

There are several high energy electron carriers used by cells including NADH, FADH2, NADPH 

ATP stores free energy in its phosphate bonds 

Phosphorylation is the addition of a phosphate to a substance 
Substrate level phosphorylation - enzyme directly takes a phosphate from one substance and adds to ADP to form ATP 

Oxidative phosphorylation – ATP produced using energy from a hydrogen ion gradient and ATP synthase enzyme 


Lecture Presented by Dr. Ben Burrows for the College of Eastern Idaho
Course BIOL 201 Intro Biology
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