Chapter 6: Metabolism and Energy Quiz

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

Tags

NGSS.HS-LS2-5

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

Tags

NGSS.HS-LS1-7

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

Tags

NGSS.HS-PS1-4

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

Tags

NGSS.HS-LS1-7

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

Tags

NGSS.HS-PS1-7

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