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Questions and Answers
What effect do abnormal conditions, such as changes in pH and temperature, have on enzymes?
What effect do abnormal conditions, such as changes in pH and temperature, have on enzymes?
Which statement correctly describes the process of anaerobic respiration?
Which statement correctly describes the process of anaerobic respiration?
What role does lipase play in lipid metabolism?
What role does lipase play in lipid metabolism?
What happens to proteins during metabolism before they enter the Krebs cycle?
What happens to proteins during metabolism before they enter the Krebs cycle?
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Which substance is NOT used as an electron acceptor in anaerobic respiration?
Which substance is NOT used as an electron acceptor in anaerobic respiration?
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Study Notes
Enzyme Activity
- Enzymes are greatly affected by pH and temperature.
- Abnormal conditions can cause enzymes to denature.
- Denaturation changes the shape of the active site.
- The substrate can no longer bind to the active site.
Anaerobic Respiration
- Anaerobic respiration produces less ATP than aerobic respiration.
- Anaerobic respiration uses inorganic compounds like sulfate (SO
4^2-^), nitrate (NO3^--^), or sulfur (S) as the electron acceptor in the electron transport chain.
Lipid and Protein Catabolism
- Lipids are broken down by enzymes called lipases.
- Glycerol from lipids is converted to dihydroxyacetone phosphate (DHAP) and enters glycolysis.
- Fatty acid components undergo beta oxidation, producing two-carbon units that create acetyl-CoA and enter the Krebs cycle.
- Lipids yield a high level of ATP.
- Proteases break down proteins into amino acids.
- Deamination removes the amino group from amino acids, leaving a carbon compound that is converted to Krebs cycle intermediates.
Electron Acceptors
- Aerobic respiration: Oxygen (O2)
- Anaerobic respiration: Inorganic compounds like nitrate, sulfur, or sulfite.
Pyruvate
- Pyruvate is a key molecule in cellular respiration.
- It is produced during glycolysis.
- Pyruvate can be used in aerobic respiration or anaerobic respiration.
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Description
Test your knowledge on enzyme activity, anaerobic respiration, and the catabolism of lipids and proteins. This quiz covers essential metabolic processes, how enzymes are affected by conditions, and the ATP yield from various biochemical pathways.
