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cell respiration
All the information is from the power points and the portfolio rubrics. Videos were found in youtube
CELLULAR RESPIRATION PROCESS
2.8.1 Cell respiration is the controlled release of energy from organic compounds to produce ATP.
2.8.2 ATP from cell respiration is immediately available as a source of energy in the cell.
2.8.3 Anaerobic cell respiration gives a small yield of ATP from glucose.
2.8.4 Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose.
2.8.2 ATP from cell respiration is immediately available as a source of energy in the cell.
2.8.3 Anaerobic cell respiration gives a small yield of ATP from glucose.
2.8.4 Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose.
what is the point of cell respiration?
Controlled release of energy from organic
compounds in cells to form ATP
–Controlled release: enzymes
–Organic compounds: carbohydrates, lipids, proteins
–Phosphate bond yields high energy
–Controlled release: enzymes
–Organic compounds: carbohydrates, lipids, proteins
–Phosphate bond yields high energy
mitochondria
•Outer membrane
–impermeable to H+
–facilitates diffusion of pyruvate
–Moves 2 e- from NADH + H+ to inside of mitochondrion
•Intermembrane space
–low pH = high concentration of H+s from ETS/proton pump
•Inner membrane
–permeable to H+
–folded into cristae, increasing SA for ETS and ATP synthetase
•Matrix
–contains enzymes for oxidative decarboxylation and Krebs cycle
–impermeable to H+
–facilitates diffusion of pyruvate
–Moves 2 e- from NADH + H+ to inside of mitochondrion
•Intermembrane space
–low pH = high concentration of H+s from ETS/proton pump
•Inner membrane
–permeable to H+
–folded into cristae, increasing SA for ETS and ATP synthetase
•Matrix
–contains enzymes for oxidative decarboxylation and Krebs cycle
glycolysis
•Glucose is a 6 carbon molecule broken down by glycolysis into pyruvate (3 carbon molecule)
•Yield: Small amounts of ATP
•Yield: Small amounts of ATP
aerobic respiration
Definition: occurs in the presence of oxygen, in the organelle mitochondria
•Pyruvate from diffuse from the cytosol into the mitochondrial matrix
•Series of reactions (link reaction, Krebs cycle, electron transport system, oxidative phosphorylation) oxidizes pyruvate to produce ATP.
The processes that occurs in the aerobic respiration are first the conversion of glucose in 2 molecules of C3 (pyruvate) by glycolysis ->the link reaction that is when the pyruvate is converted in the Acetyl CoA -> the Krebs cycle -> Electron transport system-> Oxidative phosphorylation-> product= 36ATP, water an CO2.
•Yield: LOTS of ATP (36 or more)
•Waste (product) : Water and CO2
•Pyruvate from diffuse from the cytosol into the mitochondrial matrix
•Series of reactions (link reaction, Krebs cycle, electron transport system, oxidative phosphorylation) oxidizes pyruvate to produce ATP.
The processes that occurs in the aerobic respiration are first the conversion of glucose in 2 molecules of C3 (pyruvate) by glycolysis ->the link reaction that is when the pyruvate is converted in the Acetyl CoA -> the Krebs cycle -> Electron transport system-> Oxidative phosphorylation-> product= 36ATP, water an CO2.
•Yield: LOTS of ATP (36 or more)
•Waste (product) : Water and CO2
anaerobic respiration
Definition: Respiration occurs in the absence of oxygen, in the cytoplasm of the cell.
Product: 2ATP, water and CO2 but in a less amount than the aerobic.
the processes in the anaerobic respiration are the glycolysis (same as in aerobic)-> Yeast (CO2 and ethanol) and in Humans (Lactic Acid)
Product: 2ATP, water and CO2 but in a less amount than the aerobic.
the processes in the anaerobic respiration are the glycolysis (same as in aerobic)-> Yeast (CO2 and ethanol) and in Humans (Lactic Acid)
comparetion of anaerobic and aerobic respirations
Guidance: Details of the metabolic pathways of cell respiration are not needed but the substrates and final waste products should be shown.
Guidance: There are many simple respirometers which could be used. Students are expected to know that an alkali is used to absorb CO2, so reductions in volume are due to oxygen use. Temperature should be kept constant to avoid volume changes due to temperature fluctuations.
Guidance: There are many simple respirometers which could be used. Students are expected to know that an alkali is used to absorb CO2, so reductions in volume are due to oxygen use. Temperature should be kept constant to avoid volume changes due to temperature fluctuations.