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Lecture 18 slides

Lecture 18 slides - Clicker Question The energy available...

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1 C l i c k e r Q u e s t i o n ! T h e e n e r g y a v a i l a b l e t o a c e l l t o d o w o r k i s c a l l e d : 1 . K i n e t i c e n e r g y 2 . P o t e n t i a l e n e r g y 3 . F r e e e n e r g y 4 . T o t a l e n e r g y C l i c k e r Q u e s t i o n ! T h e e n e r g y a v a i l a b l e t o a c e l l t o d o w o r k i s c a l l e d : 1 . K i n e t i c e n e r g y 2 . P o t e n t i a l e n e r g y 3 . F r e e e n e r g y 4 . T o t a l e n e r g y
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2 F u n d a m e n t a l s o f M e t a b o l i s m P a r t I : E n z y m e s a n d M e t a b o l i s m An Introduction to Metabolism (Chapter 8)
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3 M e t a b o l i s m The sum of all biochemical reactions going on in every cell ANABOLISM BIOSYNTHETIC CATABOLISM DEGRADATIVE Metabolic pathways Reactions that occur one after another in orderly fashion M e t a b o l i c P a t h w a y s
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4 M e t a b o l i c P a t h w a y s M e t a b o l i c P a t h w a y s
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5 E n e r g y Metabolism is all about ENERGY. • What do we mean by “energy” W h a t i s E n e r g y ? Capacity to do work Kinetic Energy Potential Energy • Units kilocalorie (kcal) (= 1000 cal) joules (= 0.239 cal) What kind of work is done by cells?
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6 E n e r g y E n e r g y i n a b r o a d s e n s e . . . • 1 st Law of Thermodynamics Energy can be converted from one form to another, but can’t be created or destroyed C o n s e r v a t i o n o f E n e r g y
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7 E n e r g y i n a b r o a d s e n s e . . . So, if energy is constant... E n e r g y i n a b r o a d s e n s e . . . • 1 st Law of Thermodynamics Energy can be converted from one form to another, but can’t be created or destroyed C o n s e r v a t i o n o f E n e r g y • 2 nd Law of Thermodynamics Entropy in the universe always increases E N T R O P Y - a m e a s u r
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