Skip to main content
Pearson+ LogoPearson+ Logo
Ch. 6 How Cells Harvest Chemical Energy
Taylor - Campbell Biology: Concepts & Connections 10th Edition
Taylor, Simon, Dickey, Hogan10th EditionCampbell Biology: Concepts & ConnectionsISBN: 9780136538783Not the one you use?Change textbook
All textbooksTaylor, Simon, Dickey, Hogan 10th EditionCh. 6 How Cells Harvest Chemical EnergyProblem 1
Chapter 6, Problem 1

Fill in the blanks in this summary map to help you review the key concepts of cellular respiration.
<IMAGE>

Verified step by step guidance
1
Step 1: Identify the three stages of cellular respiration. These are glycolysis (a), the citric acid cycle (b), and oxidative phosphorylation (c). Glycolysis occurs in the cytoplasm, while the citric acid cycle and oxidative phosphorylation occur in the mitochondria.
Step 2: Recognize that glucose and organic fuels (C₆H₁₂O₆) are oxidized during cellular respiration. This process involves the transfer of electrons to electron carriers such as NAD⁺ and FAD, which are reduced to NADH and FADH₂ (d).
Step 3: Understand that NADH and FADH₂ donate electrons to the electron transport chain (e), which is embedded in the inner mitochondrial membrane. The movement of electrons down the chain creates a proton (H⁺) gradient across the membrane.
Step 4: Note that the proton gradient drives the process of chemiosmosis, where H⁺ ions diffuse through ATP synthase to generate ATP. This is the primary mechanism for ATP production during oxidative phosphorylation.
Step 5: Recognize the role of oxygen (f) as the final electron acceptor in the electron transport chain, forming water (g) as a byproduct. This ensures the continuation of the electron flow and the generation of ATP.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
3m
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cellular Respiration

Cellular respiration is a metabolic process that converts glucose and oxygen into energy (ATP), carbon dioxide, and water. It occurs in three main stages: glycolysis, the Krebs cycle, and oxidative phosphorylation. This process is essential for providing energy to cells for various functions, including growth, repair, and maintenance.
Recommended video:
Guided course
03:39
Introduction to Cellular Respiration

Glycolysis

Glycolysis is the first step of cellular respiration, occurring in the cytoplasm, where one molecule of glucose is broken down into two molecules of pyruvate. This process generates a small amount of ATP and NADH, which are crucial for energy production. Glycolysis does not require oxygen, making it an anaerobic process.
Recommended video:
Guided course
05:04
Glycolysis

Krebs Cycle

The Krebs cycle, also known as the citric acid cycle, takes place in the mitochondria and processes the pyruvate produced from glycolysis. It generates high-energy electron carriers, NADH and FADH2, along with a small amount of ATP. The cycle is vital for the complete oxidation of glucose and plays a key role in the overall energy yield of cellular respiration.
Recommended video:
Guided course
01:37
Krebs Cycle
Related Practice
Textbook Question

A biochemist wanted to study how various substances were used in cellular respiration. In one experiment, she allowed a mouse to breathe air containing O₂ 'labeled' by a particular isotope. In the mouse, the labeled oxygen first showed up in

a. ATP

b. NADH

c. CO₂

d. H₂O

1807
views
Textbook Question

In glycolysis, ________ is oxidized and ________ is reduced.

a. NAD+ ... glucose

b. Glucose ... oxygen

c. ATP ... ADP

d. Glucose ... NAD+

3017
views
Textbook Question

Most of the CO₂ from cellular respiration is released during

a. Stage 1: Glycolysis

b. Stage 2: Pyruvate oxidation

c. Stage 2: The citric acid cycle

d. Stage 3: Oxidative phosphorylation

3025
views