Biology: A Guide to the Natural World with mybiology" (4th Edition)

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
KroghS10.018Energy Jan 21, 2011 Energy and Life Topic 5 - Chapters 6 and 7 I. The Nature of Energy A. What is Energy? B. Energy changes form C. Laws of Thermodynamics II. Energy in Living Things A. What is energy used for? Cellular metabolism includes: 1. Synthesis of molecules 2. Transportation of materials 3. Mechanical work: movement B. ATP: The "energy currency" of the cell 1. Adenosine Tri-Phosphate (ATP) is a nucleotide 2. Endergonic reactions required to provide energy to form phosphate bonds 3. Breaking the phosphate bonds provides energy for life (exergonic) 4. ATP works by energizing protein enzymes and other molecules C. Enzymes are catalysts that speed chemical reactions 1. Enzyme molecules bind substrate molecules in their active sirtes 2. Enzymes lower the activation energy of a particular chemical reaction making difficult, improbable reactions much easier to carry out
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
IV. OVERVIEW: RELEASING ENERGY FROM FOOD A. Most Food Macromolecules Easily Metabolized to Form Glucose B. Cellular Respiration : Metabolism of Glucose that Releases Energy to Form ATP
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 09/13/2011.

Page1 / 4

Topic5-Energy - KroghS10.018Energy Jan 21, 2011 Energy and...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online