Unit 2homeworkchapters9to162013 1 
Unit 2. Chapters 9-16. Cell Processes 1. Cellular Respiration, Photosynthesis, Cell Cycle, Mitosis, Meiosis, & Genetics.
Note A: All work must be hand-written, including charts & diagrams.
Note B: each answer requires more than one sentence & use diagrams whenever possible; failure to use diagrams will result in less points.
Chapter 9
Outline
1) Principles of Energy Conservation
a) Cellular respiration and fermentation are catabolic(energy – yielding) pathways
b) Cells must recycle the ATP they use for work.
c) Redox reactions release energy when electrons move closer to electronegative atoms
d) Electrons “fall” from organic molecules to oxygen during cellular respiration.
e) The “fall” of organisms during respiration is stepwise, via NAD and an electron transport chain.
2) The Process of Cellular Respiration
a) Respiration involves glycolysis, the Krebs cycle, and electron transport: an overview
b) Glycolysis harvests chemical energy by oxidizing glucose to pyruvate: a closer look
c) The Krebs Cycle completes the energy-yielding oxidation of organic molecules: a closer look
d) The inner mitochondrial membrane couples electron transport to ATP synthase: a closer look
e) Cellular respiration generates many ATP molecules for each sugar molecule it oxidizes: a review
3) Related Metabolic Processes.
a) Fermentation enables some cells to produce ATP without the help of oxygen
b) Glycolysis and the Krebs cycle connect to many other metabolic pathways
c) Feedback mechanisms control cellular respiration
Questions
1) Diagram energy flow through the biosphere.
2) Describe the overall summary equation for cellular respiration.
3) Distinguish between substrate-level phosphorylation and oxidative phosphorylation. (it has been suggested by Mr. Hunt that you do this problem, above, last.)
4) Explain how exergonic oxidation of glucose is coupled to endergonic synthesis of ATP.
5) Define oxidation and reduction
6) Explain how redox reactions
Note A: All work must be hand-written, including charts & diagrams.
Note B: each answer requires more than one sentence & use diagrams whenever possible; failure to use diagrams will result in less points.
Chapter 9
Outline
1) Principles of Energy Conservation
a) Cellular respiration and fermentation are catabolic(energy – yielding) pathways
b) Cells must recycle the ATP they use for work.
c) Redox reactions release energy when electrons move closer to electronegative atoms
d) Electrons “fall” from organic molecules to oxygen during cellular respiration.
e) The “fall” of organisms during respiration is stepwise, via NAD and an electron transport chain.
2) The Process of Cellular Respiration
a) Respiration involves glycolysis, the Krebs cycle, and electron transport: an overview
b) Glycolysis harvests chemical energy by oxidizing glucose to pyruvate: a closer look
c) The Krebs Cycle completes the energy-yielding oxidation of organic molecules: a closer look
d) The inner mitochondrial membrane couples electron transport to ATP synthase: a closer look
e) Cellular respiration generates many ATP molecules for each sugar molecule it oxidizes: a review
3) Related Metabolic Processes.
a) Fermentation enables some cells to produce ATP without the help of oxygen
b) Glycolysis and the Krebs cycle connect to many other metabolic pathways
c) Feedback mechanisms control cellular respiration
Questions
1) Diagram energy flow through the biosphere.
2) Describe the overall summary equation for cellular respiration.
3) Distinguish between substrate-level phosphorylation and oxidative phosphorylation. (it has been suggested by Mr. Hunt that you do this problem, above, last.)
4) Explain how exergonic oxidation of glucose is coupled to endergonic synthesis of ATP.
5) Define oxidation and reduction
6) Explain how redox reactions