What is the definition of metabolism?

• Sum of all chemical reactions in the body

• Breakdown of food in the stomach

• Conversion of energy in the mitochondria

• Absorption of nutrients in the intestines

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What is cellular metabolism?

• Sum of all chemical reactions occurring in a cell

• Breakdown of proteins in the liver

• Conversion of glucose to energy in muscles

• Absorption of oxygen in the lungs

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Which type of metabolic reaction involves building small molecules into larger ones?

• Anabolism

• Catabolism

• Photosynthesis

• Glycolysis

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What does catabolism do in metabolic reactions?

• Breaks down larger molecules into smaller ones; releases energy

• Builds larger molecules from smaller ones; requires energy

• Converts sunlight into chemical energy

• Transports oxygen in the blood

What must be carefully controlled in cells to maintain balance?

• Rates of catabolism and anabolism

• Rates of photosynthesis and respiration

• Rates of diffusion and osmosis

• Rates of mitosis and meiosis

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

• The cell can become more efficient

• The cell can grow faster

• The cell can become damaged or die

• The cell can divide more rapidly

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What role do enzymes play in metabolic reactions?

• They slow down reaction rates

• They control and greatly increase reaction rates

• They eliminate reaction rates

• They have no effect on 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.

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How are enzymes named?

• Randomly, with no specific pattern.

• After the substrate, with "-ase" as a suffix.

• Based on the temperature they work at.

• According to the pH level they require.

What characteristic allows enzymes to recognize their substrates?

• The color of the substrate.

• The shape of the active site.

• The temperature of the environment.

• The pH level of the solution.