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Transcript of Homework: Due Tuesday: Finish the pre-lab questions on page 3. Answer any analysis questions that...
AP Biology: Thursday, 11/9/11Lab 5: Measuring Rates of Cell Respiration
Homework: Due Tuesday: Finish the pre-lab questions on page
3. Answer any analysis questions that you can (but
save graph for class) Start PS 9
Do Now: Get a lab preview worksheet and answer #1-4
Goal for Today: Design and carry out an experiment to measure
rates of cell respiration
AP Biology: Wednesday, 11/16/11Cellular Respiration
Homework: Work on PS 9 (due Friday)
Do Now: On an index card:1. What is one thing you learned how to do in Excel
yesterday that you didn’t know before? Describe how to do this.
2. What is one question you still have about manipulating data in Excel?
3. In what ways was the cold-temperature experiment yesterday sloppy? How could it have been improved?
Lecture: Cellular Energetics and Cell Respiration
Goals: By the end of class you will be able to: Define oxidation and reduction and
apply it to the cell respiration chemical equation
Describe the role of NADH and FADH2 in cell respiration (and the role of all the molecules in the chemical equation)
Describe how the 3 stages of cell respiration transfer energy and electrons from glucose in order to make ATP
Cellular Respiration: An Overview
Overall purpose:• Release energy from food in the form of ATP
for cells to useWhere it happens:• In the mitochondria of all eukaryotic cells• In aerobic bacteriaSummary equation:C6H12O6 + 6O2 6CO2 + 6H2O + energy (ATP + heat)
glucose + oxygen carbon dioxide + water + energy
Cell Respiration: A “Redox” Reaction
oxidation – the loss of electrons
reduction – the gain of electrons
LEO says GER
C6H12O6 + 6O2 6CO2 + 6H2Oe-
oxidation
reduction
Important Molecules inCell Respiration
• Glucose – provides energy and electrons• Oxygen – final electron acceptor• Carbon dioxide – low-energy waste product
from glucose oxidation• Water – low-energy waste product from oxygen
reduction• NADH and FADH2 – intermediate electron
carriers– Transfer electrons between stages of cell resp.
Outer membrane
Inner membrane
Inter-membrane space
Cristae (folds in inner membrane)
Matrix
AP Biology: Thursday, 11/17/11Cellular Respiration Details
Homework: Quiz tomorrow – you can bring one page (one side
only) of notes. Typed or hand-written, but on your own paper (not any handout I’ve given you)
PS 9 due Monday
Do Now: (in your mind or in your notebook)
1. What’s the difference between oxidation and
reduction?
2. What do NADH and FADH2 do in cell respiration?
3. What do you think “glycolysis” means?
Lecture: Cell Respiration Details
Goals: By the end of class you will be able to: Describe how the 3 stages of cell
respiration transfer energy and electrons from glucose in order to make ATP
Explain how cell respiration can happen in the absence of glucose, and in the absence of oxygen
Glycolysis:
P
Pglucose
(6 carbons) 2 pyruvate(3 carbons each)
splitting glucose
to ETS
Citric Acid Cycle (aka Krebs cycle)
intermediatestep
Oxidative Phosphorylation(ETS and Chemiosmosis)
e-e-
e- e-
Inspirational Video…
Then do the first side of the worksheet
Cell Respiration without oxygen:Anaerobic Respiration (Fermentation)
Cell Respiration without oxygen:Anaerobic Respiration (Fermentation)
Two Types of Fermentation:
both regenerate NAD+ so that glycolysis can continue
ALCOHOL FERMENTATION • in yeast cells and some bacteria• produces ethyl alcohol and CO2
LACTIC ACID FERMENTATION • in vertebrate muscle cells and some bacteria• produces lactic acid
AP Biology: Friday, 11/18/11Cellular Respiration
Homework: Problem Set 9 due Monday
Do Now:How do you think cell respiration can happen if a cell
runs out of glucose?
Today’s Agenda: Cell Respiration Wrap-Up Quiz
Cell Respirationwithout glucose!
Total ATP Production
Total ATP Production
Quiz
Work on your own for 20 minutes Use your 1 page of notes
Partner Check-in for last 10 minutes Confer with an assigned partner to
discuss/check your answers You may not use your notes for this part
Quiz Partners
Adel / ImadTalia / FatimaChristina / DjinnieDrishti / KlaraPoppy / RishabNehemie / KiraleahKimberly / Nicole Jasmine / Aaron