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Questions and Answers
What are the two main types of processes in metabolism?
What are the two main types of processes in metabolism?
- Digestion and Absorption
- Catabolism and Anabolism (correct)
- Photosynthesis and Respiration
- Oxidation and Reduction
What is an example of a catabolic process?
What is an example of a catabolic process?
- Breakdown of glucose during cellular respiration (correct)
- Replication of DNA
- Formation of glucose during photosynthesis
- Synthesis of proteins
Which process is characterized by the synthesis of complex molecules from simple molecules?
Which process is characterized by the synthesis of complex molecules from simple molecules?
- Digestion
- Anabolism (correct)
- Photosynthesis
- Catabolism
Which of the following statements about enzymes is true?
Which of the following statements about enzymes is true?
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Which form of metabolism releases energy?
Which form of metabolism releases energy?
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What type of macromolecules are most enzymes made of?
What type of macromolecules are most enzymes made of?
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Study Notes
Metabolism
- Metabolism is the umbrella term for all chemical reactions occurring in a living organism
- These processes involve converting food into energy in the form of ATP and forming biomolecules like carbohydrates, proteins, lipids, and nucleic acids
- Metabolism has two main branches: catabolism and anabolism
Catabolism
- Catabolism is the breakdown of complex substances into simpler ones, releasing energy in the process
- Example: breaking down glucose during cellular respiration to generate energy
- Chemical reaction: A (substrate) -> B + C (products)
Anabolism
- Anabolism is the synthesis of complex molecules from simpler ones, using or absorbing energy
- Example: forming glucose during photosynthesis
- Chemical reaction: A + B (substrate) -> C (product)
Enzymes
- Biochemical reactions occur at a high rate in cells to maintain living processes
- Enzymes are responsible for speeding up these reactions
- An enzyme is an organic catalyst, mostly made up of proteins, produced by living cells
- Note: not all enzymes are synthesized from proteins
- Substances required for the reaction are called substrates
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