2.28 Electron Transport Chain Quiz

What is a reactant for the electron transport chain?

• NADPH

• ATP

• Oxygen

• Water

Answer explanation

Oxygen is a crucial reactant in the electron transport chain, where it serves as the final electron acceptor, allowing for the production of ATP. Other options like NADPH and ATP are products, while water is a byproduct.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Where does the electron transport chain occur?

• Nucleus

• Vacuole

• Mitochondria

• Nucleolus

Answer explanation

The electron transport chain occurs in the mitochondria, which are the powerhouse of the cell. This process is crucial for ATP production through oxidative phosphorylation.

Tags

NGSS.HS-LS1-7

In what part of the mitchondria does the electron transport chain occur?

• Inner mitochondrial membrane (folds of the mitochondria)

• Outer mitochondrial membrane

• Cytoplasm

• Ribosomes

Answer explanation

The electron transport chain occurs in the inner mitochondrial membrane, where the folds (cristae) increase surface area for efficient ATP production through oxidative phosphorylation.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

True or False: Water is produced as a byproduct during this stage of cellular respiration.

• True

• False

Answer explanation

True. Water is produced as a byproduct during the electron transport chain stage of cellular respiration, where oxygen combines with electrons and protons.

Tags

NGSS.HS-LS1-7

The process that enables ATP synthase to function is...

• endocytosis

• active transport

• pinocytosis

• osmosis

• diffusion

Answer explanation

ATP synthase functions through diffusion, specifically the diffusion of protons (H+) across the membrane. This movement drives the synthesis of ATP from ADP and inorganic phosphate, making diffusion the correct process.

What does FADH2 and NADH bring to the electron transport chain?

• Oxygen

• Water

• Electron

• ATP

Answer explanation

FADH2 and NADH donate electrons to the electron transport chain, which are essential for the production of ATP through oxidative phosphorylation. Thus, the correct answer is 'Electron'.

Tags

NGSS.HS-LS1-7

ATP synthesis by ATP synthase is driven by

• H⁺ movement

• electron movement

• NADH movement

• FADH₂ movement

Answer explanation

ATP synthesis by ATP synthase is driven by the movement of H+ ions across the membrane, creating a proton gradient. This flow of protons powers the enzyme to convert ADP and inorganic phosphate into ATP.

Tags

NGSS.HS-LS1-7

Please indicate the correct equation(s) for Cellular Respiration. (2 answers)

• Glucose + Oxygen --> Carbon Dioxide + Water + Energy

• C₆H₁₂O₆ + O₂ --> CO₂ + H₂O + ATP

• Carbon Dioxide + Water + Energy --> Glucose + Oxygen

• C₆H₁₂O₆ + 6 O₂ --> 6 CO₂ + 6 H₂O + ATP

Answer explanation

The correct equations for Cellular Respiration are: 1) Glucose + Oxygen --> Carbon Dioxide + Water + Energy, which summarizes the process, and 2) C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O + ATP, which provides the balanced chemical equation.

Tags

NGSS.HS-LS1-7

The conversion of glucose to two molecules of pyruvate is the result of what process?

• the krebs cycle

• glycolysis

• the electron transport chain

• oxidative phosphorylation

Answer explanation

The conversion of glucose to two molecules of pyruvate occurs during glycolysis, which is the first step in cellular respiration, breaking down glucose to extract energy.

What does ATP synthase do?

• Create ATP in chemiosmosis.

• Break down ATP in chemiosmosis.

• Break down NADPH. 

• Create NADPH.

Answer explanation

ATP synthase creates ATP during chemiosmosis by utilizing the proton gradient across the membrane. This process is essential for energy production in cells, making 'Create ATP in chemiosmosis' the correct choice.

Tags

NGSS.HS-LS1-7