anaerobic respiration
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Anaerobic Respiration. What happens when there isn’t enough oxygen to accept the H+ and e-?. Glucose + oxygen carbon dioxide + water + ATP C 6 H 12 O 6 + 6O 2 + 38 ADP + 38 Pi 6 CO 2 + 6 H 2 O + 36 ATP. Carbon dioxide + water. Glucose. Aerobic Respiration. Glycolysis - PowerPoint PPT PresentationTRANSCRIPT
Anaerobic Respiration
What happens when there isn’t enough oxygen to accept the H+ and e-?
Pyruvic acid
Glucose
Carbon dioxide + water
Glycolysis2 ATP
Krebs and ETC36 ATP
Aerobic Respiration
Glucose + oxygen carbon dioxide + water + ATP
C6H12O6 + 6O2 + 38 ADP + 38 Pi 6 CO2 + 6 H2O + 36 ATP
Pyruvic acid
Glucose
2 ATP
Anaerobic Respiration
No oxygen as final H+ / e- acceptor
e- transport and Krebs cycle stop
pyruvate buildup
Pyruvic acid
Glucose
Lactic acid
2 ATP
Anaerobic respiration
In animals
Typically occurs in animals during prolonged exercise.
Lactic acid causes muscle fatigue
Pyruvic acid
Glucose
Ethanol + Carbon dioxide
2 ATP
Anaerobic Fermentation in yeast & bacteria
Normal way of life.
Carbon dioxide release causes the bubbles in bread and beer
Plenty of oxygen Aerobic respiration
Lots of ATP
Low oxygen anaerobic respiration
less ATP
↑energy requirements ↑ increase respiration rate ↑ oxygen demand & ↑ CO2
↑ breathing rate
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Quick Quiz
MCQ
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Key words
• ATP• glycolysis• glucose• pyruvate• final acceptor• lactic fermentation• yeast fermentation• anaerobic
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QUICK QUIZ1. ____ respiration occurs in the absence of sufficient oxygen
2. Yeast undergoes ____ under anaerobic conditions
3. Animals produce ____ under anaerobic conditions
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Answers
QUICK QUIZ1. anaerobic respiration occurs in the absence of sufficient oxygen
2. Yeast undergoes fermentation under anaerobic conditions
3. Animals produce lactic acid under anaerobic conditions
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Exercise
• Workbook pp 67-72, all questions• Pathfinder p45 q5
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READING• Pathfinder p43• Excellence in Biology 126-130
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Question 1
When living cells break down molecules, energy is
a. stored as ADP
b. released as heat
c. stored as ATP
d. Both b and c
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Question 2
In cellular respiration, the most ATP is made during
a. glycolysis
b. lactic acid fermentation
c. the Krebs cycle
d. electron transport chain
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Question 3
The breakdown of sugars to produce ATP and ethanol is known as
a. respiration
b. alcoholic fermentation
c. lactic-acid fermentation
d. photosynthesis
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Question 4
Which of the following is not formed during Cellular Respiration?
a. Oxygen
b. ATP
c. CO2
d. Water
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Question 5
Which of the following is never part of cellular respiration?
a. Fermentation
b. the Krebs cycle
c. glycolysis
d. the Calvin cycle
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Question 6
With enough oxygen present which of the following does not occur?
a. glycolysis.
b. aerobic respiration
c. fermentation
d. All of the above
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Question 7
An important molecule generated by both lactic acid and alcoholic fermentation is
a. ATP
b. CO2
c. NADH
d. NAD+
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Question 8
Glycolysis takes place _____
a. in all cells
b. only if oxygen is present
c. without oxygen
d. only if oxygen is absent
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Question 9
Yeast cells produce alcohol and CO2 in the process of _________
a. lactic acid fermentation
b. glycolysis
c. aerobic respiration
d. alcoholic fermentation
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Question 10
Glycolysis takes place in the ____________
a. chloroplast
b. mitochondria
c. cytoplasm
d. nucleus
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Question 11
Aerobic Respiration produces ____ molecules of ATP.
a. 34
b. 19
c. 2
d. 63
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Question 12
Aerobic processes require _____ in order to take place.
a. sunlight
b. oxygen
c. water
d. carbon dioxide
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Question 13
To maximize ATP production, glycolysis must be followed by
a. fermentation
b. the Calvin cycle
c. aerobic respiration
d. photosynthesis
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Question 14
When muscles are exercised extensively in the absence of sufficient oxygen
a. oxidative respiration
b. ethanol is produced
c. glucose
d. lactic acid is produced
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Question 15
What two organs do we store sugars in?
a. muscles & heart
b. Liver & muscles
c. stomach & intestines
d. brain & spine
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Correct
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Incorrect
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