energy and life
TRANSCRIPT
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Energy and Life
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Which one would you choose?
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What is the currency of the cell?
• Understand ‘valuable’ vs. ‘usable’• The energy currency of cells is…
Adenosine tri-phosphate. (ATP)
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ATP – Energy molecule
• Energy is stored in the bonds.• ATP ADP (+ P) and energy
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ATP/ADP – Rechargeable battery
ATP – Fully Charged Battery ADP – Partially Charged Battery
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Electron Carriers/CoenzymesNAD and FAD
…Act as a shuttle……Are constantly being reduced and oxidized…Reduced – gain electron(s)Oxidized – lose electron(s)In addition to the enzymes the cell needs, there are two
coenzymes used in cellular respiration. They are:Nicotinamide adenine dinucleotide (NAD+)Flavine adenine dinucleotide (FAD)
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When reduced, NAD+ becomes…
…NADH (high energy molecule)
When oxidized, NADH becomes……NAD+
When reduced, FAD becomes…
…FADH2 (high energy molecule)
When oxidized, FADH2 becomes…
…FADReduced coenzymes (FADH2 and NADH) are used
to convert ADP ATP. (They are good.)