Ch. 4 - Cellular Metabolism

What is metabolism?

• The breakdown of food in the stomach

• The sum of all chemical reactions in the body

• The process of breathing

• The circulation of blood

What is cellular metabolism?

• The sum of all chemical reactions occurring in a cell

• The process of cell division

• The movement of cells

• The destruction of cells

What are the two types of metabolic reactions?

• Photosynthesis and Respiration

• Anabolism and Catabolism

• Digestion and Absorption

• Oxidation and Reduction

What is anabolism?

• The breakdown of large molecules into smaller ones

• The building of small molecules into larger ones

• The release of energy

• The process of digestion

What is catabolism?

• The building of small molecules into larger ones

• The breakdown of large molecules into smaller ones

• The absorption of nutrients

• The process of photosynthesis

What must be carefully controlled in cells to ensure proper metabolic function?

• Rates of photosynthesis and respiration

• Rates of catabolism and anabolism

• Rates of diffusion and osmosis

• Rates of mitosis and meiosis

What can happen if there are imbalances in reaction rates within a cell?

• The cell will grow faster

• The cell will become more efficient

• The cell can be damaged or killed

• The cell will divide more frequently

What role do enzymes play in metabolic reactions?

• They slow down reaction rates

• They control rates of both catabolic and anabolic reactions

• They decrease energy production

• They inhibit metabolic processes

How do enzymes affect reaction rates?

• They greatly decrease reaction rates

• They have no effect on reaction rates

• They greatly increase reaction rates

• They slightly increase reaction rates

What is the primary function of enzymes in chemical reactions?

• They are consumed in the reaction.

• They increase the activation energy.

• They lower the activation energy.

• They decrease the rate of reactions.