Ecosystem Energy Flow

What is the net result of energy flow in an ecosystem?

Energy is created during photosynthesis
Energy is stored in organic molecules
Energy is transferred from one organism to another
Energy is lost as heat (correct)

What is the primary purpose of cellular respiration?

To convert sunlight into chemical energy
To generate O2 and organic molecules
To synthesize ATP from energy stored in organic molecules (correct)
To break down organic molecules into ATP

What is the byproduct of aerobic respiration?

Oxygen
Ethanol
ATP and heat (correct)
Lactic acid

What is the purpose of fermentation?

To generate ATP in the absence of O2 (A) Signup and view all the answers

What is the electron receptor called in a redox reaction?

Oxidizing agent (A) Signup and view all the answers

What is the overall equation for cellular respiration of glucose?

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy (C) Signup and view all the answers

What is the primary function of the electron transport chain?

To break down large free-energy drops from food into smaller steps (A) Signup and view all the answers

During oxidative phosphorylation, what is the role of chemiosmosis?

To couple electron transport to ATP synthesis (C) Signup and view all the answers

What is the net ATP production during cellular respiration?

36-38 ATP (A) Signup and view all the answers

What is the difference between obligate anaerobes and facultative anaerobes?

Obligate anaerobes cannot survive in the presence of O2, while facultative anaerobes can survive using either fermentation or aerobic respiration (B) Signup and view all the answers

What is the purpose of feedback inhibition in cellular respiration?

To regulate the activity of enzymes at strategic points in the catabolic pathway (B) Signup and view all the answers

What is the role of NADH and FADH2 in cellular respiration?

To donate electrons to the electron transport chain (B) Signup and view all the answers

What is the difference between fermentation and aerobic respiration?

Fermentation occurs in the absence of O2, while aerobic respiration occurs in the presence of O2 (A) Signup and view all the answers

What is the role of the citric acid cycle in cellular respiration?

To convert acetyl CoA into ATP (C) Signup and view all the answers

What is the purpose of glycolysis in cellular respiration?

To convert glucose into pyruvate (A) Signup and view all the answers

What is the role of ATP synthase in chemiosmosis?

To use the exergonic flow of H+ to drive phosphorylation of ATP (C) Signup and view all the answers

What is the role of NAD+ in cellular respiration?

As an oxidizing agent (D) Signup and view all the answers

What is the net result of glycolysis in terms of ATP production?

2 ATP produced, 2 ATP used (B) Signup and view all the answers

What is the primary location of the citric acid cycle?

Mitochondrial matrix (B) Signup and view all the answers

What is the byproduct of the citric acid cycle that enters the electron transport chain?

NADH and FADH2 (C) Signup and view all the answers

What is the purpose of oxidative phosphorylation?

To synthesize ATP from ADP and Pi (C) Signup and view all the answers

What is the energy investment phase of cellular respiration?

Glycolysis (C) Signup and view all the answers

What is the energy payoff phase of cellular respiration?

Oxidative phosphorylation (C) Signup and view all the answers

What is the byproduct of pyruvate conversion in the mitochondrion?

Acetyl CoA (A) Signup and view all the answers

What is the purpose of the electron transport chain?