12th Grade Unit Test ; Metabolism

Which metabolic process involves the breakdown of complex molecules into simpler ones to release energy?

• Photosynthesis
• Transpiration
• Respiration
• Fermentation

During which metabolic process are new molecules and structures built by the cell, requiring an input of energy?

• Fermentation

• Cellular respiration
• Anabolism
• Catabolism

Which metabolic process typically involves the release of energy, such as in the digestion of food?

• Anabolism

• Transpiration
• Carabolism

• Fermentation

Which of the following is NOT a function of enzymes in biological systems?

• Speed up chemical reactions
• Provide energy for reactions
• Regulating metabolic pathways

• Facilitate specific reactionsEnhancing reaction specificity

hat is the term for the specific region on an enzyme where a substrate binds and a chemical reaction takes place?

• Active site
• Binding site
• Catalytic site
• Reaction site

Enzyme activity is highly sensitive to changes in which environmental factor?

• Light intensity
• Soil type
• pH level
• Wind speed

What are the two main components that make up an enzyme, and what roles do they play in the enzyme's function?

• Protein and Lipid, Protein provides structure and Lipid acts as a catalyst
• Protein and Nucleic Acid, Protein provides structure and Nucleic Acid acts as a catalyst
• Activator and inhibitor, controlling enzyme activity.

• Apoenzyme and Cofactor, Apoenzyme provides structure and Cofactor acts as a catalyst

Enzyme names often end in "-ase." Which of the following is an enzyme responsible for breaking down starch into simpler sugars?

• Lipase
• Protease
• Amylase
• Nuclease

Which of the following best describes the Lock and Key model of enzyme-substrate interactions?

• The enzyme changes shape to fit the substrate
• The substrate changes shape to fit the enzyme
• Enzymes have specific active sites that complement the shape of substrates.

• The enzyme and substrate do not interact at all. the enzyme is consumed

What happens to the enzyme after it catalyzes a reaction in the Lock and Key model?

• The enzyme is consumed and cannot be used again
• The enzyme changes shape and cannot be used againThe enzyme undergoes a structural change and loses its activity.

• The enzyme binds irreversibly to the substrate.

• The enzyme remains unchanged and can be used again