SBI4U - Metabolism Quick Study Guide

Potential Energy

Stored energy

Kinetic Energy

Energy of Motion

First Law of Thermodynamics

Energy cannot be created or destroyed

Metabolism

The sum of all reactions in an organism

Spontaneous change occurs when…

The system does not require energy in put

Non-spontaneous change occurs when …

The system requires energy input

Gibbs Free energy determines…

Spontaneous vs. non-spontaneous

Enzyme Function

speed up reactions

Catalysts work by…

lowering Activation Energy

Calvin Cycle Order

Fixation -- Reduction - Regeneration

CalvinCycle products

Glyceraldehyde-3 phosphate

ATP per aerobic cellular respiration

32-38

Final product of ETC

Water

Active Site

• Region of an enzyme - substrate binds to - Reaction occurs

Reduction

• loss of O - Gain of H

Oxidation

• loss Of H - Gain of O

Activation Energy

Min energy to start a reaction

Induced Fit Model

Enzyme changes to fit substrate

Entropy

Measures Disorder

Bond Energy

Min energy to break bonds

Transition State

Unstable state before products form

Photons

Light particles driving photosynthesis

Reaction Centre

Chlorophyll molecule that initiates light-dependent reactions

Obligate Aerobe

Obligated to oxygen

Obligate Anaerobe

Obligate to no oxygen

Facultative anaerobe

Live w or w/o oxygen

Photoautotroph

Uses light energy to make ATP

Photosynthetic Pigments

Molecules that absorb light energy

Photosystem 2

• SplitS H2O - Absorbs light 680nm

Photosystem 1

• Produces NADH - Absorbs light &700 nm