Integrative Biology 102: Lecture Outline

Releasing Energy: Respiration

Lecture Objectives

By the end of this lecture and after reading the text, you should be able to:

1. explain the transformation of energy during photosynthesis through respiration.
2. explain the chemical interdependency between respiration and photosynthesis.
3. list the reactants and products of respiration, and tell how the products are used by plants and animals for survival, growth and reproduction.
4. list the five chemical pathways of respiraton, their location in the cell, reactants and products.
5. compare and contrast anaerobic and aerobic respiration in terms of location, products and efficiency.
6. briefly describe the role of enzymes in respiration.
7. explain how the following environmental factors affect the rate of respiration:

   a. oxygen availability

   b. mineral availability

8. explain the role of respiration in the functioning of a compost pile.

Reading: Levetin & McMahon Chapter 4

starch biosynthesis mitochondrion

glucose CO2 ATP/ADP

lactic acid ethyl alcohol fermentation

Sites
U of I site on composting
How to compost

Movies:
Glycologysis animation
Aetyl CoA and Krebs cycle animation
Electron Transport Chain & Oxidative Phosphorylation--Animations
Cellular Respiration

• Through ecosystem
  
  
  
  
• Use in plant life cycle
  
  
  
  
• Relationship to photosynthesis
  
  
  
  
• Purpose of respiration

2. Aerobic respiration

• Location

• Glycolysis

  

  • location
    
    
  • reactants & products

• Acetyl CoA & Krebs Cycle

  

  • location
    
    
  • reactants & products

• Electron Transport Chain & Oxidative Phosphorylation
  • location
    
    
  • reactions & products
    
    
    

3. Anaerobic respiration

• Alcoholic fermentation
  • organisms
    
    
  • location
    
    
  • reactants & products

• Lactic acid fermentation
  • organisms
  
  
  • location
    
    
  • reactants & products

   

4. Comparing aerobic and anaerobic respiration

• location
  
  
• products
  
  
• efficiency

5. Limiting factors

• oxygen

• minerals

• enzymes
  

6. Compost

• What goes in
  
  
  
• What comes out
  
  
  

For the next lecture on Plants Used to Feed the World, read Ch. 9.2, page 184 and in Leventin & McMahon, pages 91, 188-189, 193, 198-203, and 221-231. Be ready to answer these questions:

• Why are seeds a good source of nutrition?
• What does knowing the center of origin for a crop plant tell us?