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WorksheetsChapter 6: Metabolism and Energy Quiz
Total questions: 15
Worksheet time: 15mins
What is an open system in biology?
A system that exchanges energy with its surroundings
A system that is closed off from its surroundings
A system that does not require energy to function
A system that only exchanges matter with its surroundings
According to the First Law of Thermodynamics, energy can be:
Created and destroyed
Created but not destroyed
Destroyed but not created
Neither created nor destroyed
What is the main function of ATP in cells?
Building macromolecules
Transporting substances across the cellular membrane
Providing energy for cellular work
Breaking down molecules into smaller units
What is the difference between exergonic and endergonic reactions?
Exergonic reactions release energy, while endergonic reactions require energy
Exergonic reactions require energy, while endergonic reactions release energy
Exergonic reactions and endergonic reactions both release energy
Exergonic reactions and endergonic reactions both require energy
What is the role of enzymes in metabolic pathways?
To facilitate and speed up chemical reactions
To store and release energy
To transport substances across the cellular membrane
To break down molecules into smaller units
What is the function of cofactors in enzyme activity?
To lower the energy of activation
To bind to the active site of enzymes
To provide energy for cellular work
To regulate the pH of the environment
What happens to enzyme activity when the pH changes beyond the optimal conditions?
Enzyme activity increases
Enzyme activity decreases
Enzyme activity remains the same
Enzyme activity stops completely
What is the purpose of oxidation-reduction reactions?
To release energy
To store energy
To transport substances across the cellular membrane
To break down molecules into smaller units
What is the difference between reduction and oxidation?
Reduction involves gaining electrons, while oxidation involves losing electrons
Reduction involves losing electrons, while oxidation involves gaining electrons
Reduction and oxidation both involve gaining electrons
Reduction and oxidation both involve losing electrons
What is the role of ATP in chemical work?
To provide energy for muscle contraction
To synthesize macromolecules
To transport substances across the cellular membrane
To release heat into the environment
What is the role of ATP in transport work?
To provide energy for muscle contraction
To synthesize macromolecules
To transport substances across the cellular membrane
To release heat into the environment
What is the role of ATP in mechanical work?
To provide energy for muscle contraction
To synthesize macromolecules
To transport substances across the cellular membrane
To release heat into the environment
What is the purpose of catabolism?
To break down molecules into smaller units and produce ATP
To build molecules from smaller units and require ATP
To store energy in macromolecules
To transport substances across the cellular membrane
What is the purpose of anabolism?
To break down molecules into smaller units and produce ATP
To build molecules from smaller units and require ATP
To store energy in macromolecules
To transport substances across the cellular membrane
What is the function of reactants in a metabolic reaction?
To participate in the reaction
To produce the product
To store energy
To release heat into the environment
