Celluar Respiration And Fermentation Flashcards
What is a mitochondrial disease?
Genetic mutation in mitochondria
What is the connection between cellular respiration and photosynthesis?
Photosynthesis produces glucose and oxygen which is used in cellular respiration. Cellular respiration then produces carbon dioxide and water which plants need
Define cellular respiration
Process by which mitochondria break down food molecules to produce ATP in plants and animals
What is the formula for cellular respiration
C6H12O6 + O2 = ATP + H2O + CO2
Glucose + oxygen = ATP + water + carbon dioxide
What is the purpose of cellular respiration?
To change glucose into ATP
What are thee three stages of cellular respiration? Are they aerobic or anaerobic?
Glycolysis - anaerobic
Citric acid cycle - aerobic
Electron Transport Chain- aerobic
What does anaerobic and aerobic mean?
Anaerobic - no oxygen
Aerobic - oxygen
What does glycolysis do?
Breaks down glucose into 2 pyruvate
What does glycolysis use in the reactions?
Enzymes
Where does glycolysis take place?
Cytosol
What does glycolysis produce and what are they used for?
2 pyruvate - used in the citric acid cycle
2 ATP- energy for the cell
2 NADH - electron carrier
What happens after glycolysis?
Pyruvate enters the mitochondria
What does every turn in the citric acid cycle yeild?
1 ATP
4 NADH
1 FADH2
Byproduct: 3 CO2
How many times does the citric acid cycle turn per glucose molecule?
2
After the second turn what does the citric acid cycle yield?
2 ATP
8 NADH
2 FADH2
Byproduct: 6 CO2
What electron carriers are used in the electron transport chain?
NADH
FADH2
What is the purpose and function of the electron transport chain?
Use electron carriers to pass electrons down the chain and slowly release energy to form ATP and water molecules
What part of cellular respiration transfers the most energy? How much is it?
Electron transport chain
32-34 ATP
Overall how much ATP is made during cellular respiration?
36-38
What is fermentation?
Anaerobic respiration that can follow glycolysis instead to produce energy - used when oxygen is not available
Why isn’t fermentation used more often than cellular respiration?
Not as efficient, produces far fewer ATP
What are the 2 types of fermentation?
Lactic acid fermentation
Alcoholic fermentation
When does lactic acid fermentation occur
In muscle cells during exercise when a lot of energy is required and oxygen is scarce
What are the reactants and products of lactic acid fermentation?
Reactants: glucose and pyruvic acid
Products: lactic acid and ATP
Where is lactic acid cover yes to from the muscle cells?
The liver where it is converted back into pyruvic acid
Where is lactic acid fermentation often found?
Food - yogurt, sauerkraut, kimchi
What are the reactants and products of alcoholic fermentation?
Reactants: glucose, pyruvic acid
Products: alcohol (ethanol), carbon dioxide, ATP
What are examples of types of cells that can undergo alcoholic fermentation?
Yeast and bacteria
What causes bread to rise?
Bubbles formed by the CO2 from alcoholic fermentation
What turns grape juice into wine?
The alcohol released from alcoholic fermentation
Why would organisms ever need to undergo fermentation?
If oxygen is unavailable
During glycolysis glucose is…
Partially broken down and some of its stored energy is released
Both lactic acid fermentation and alcoholic fermentation produce…
NAD+ from NADH and H+
The efficiency of glycolysis is about…
2%
The anaerobic pathways provide enough energy to meet all of the energy needs of…
Many unicellular and multi-cellular organisms
What are the energy containing products of glycolysis?
ATP
NADH
pyruvic acid
The starting substance of the citric acid cycle which is regenerated at the end of the cycle is…
Oxaloacetic acid
The electron transport chain…
Generates O2 from h2O
The maximum efficiency of aerobic respiration is…
39%
In the citric acid cycle, what molecule acquires most of the beefy that is released by the oxidation of acetyl CoA and how many of these molecules are produced during each turn?
NADH - 3 molecules
Which reactions of aerobic respiration occur in the inner mitochondrial membrane?
Electron transport chain
How is the structure of mitochondria well adapted for the activities it carries out?
It has a large surface area which means more room for the electron transport chain which means more ATP produced