Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
6th Edition
ISBN: 9780134296029
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 9, Problem 1TYK

Where does the citric acid cycle occur in eukaryotes?

a. in the cytosol of cells

b. in the intermembrane space of mitochondria

c. in the inner membrane of mitochondria

d. in the matrix of mitochondria

Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

The citric acid cycle (CAC) or tricarboxylic acid cycle (TCA cycle) is a series of biochemical reactions, a stage of cellular respiration in cells that breakdowns the organic fuel molecules such as carbohydrates, proteins, and fats and releases energy through the oxidation of acetyl-CoA.

Answer to Problem 1TYK

Correct answer:

In the matrix of mitochondria

Explanation of Solution

Explanation/Justification for the correct answer:

Option (d) is given as mitochondrial matrix. Adenosine triphosphate (ATP) is classified as the source of energy in each cell in all the organisms. The conversion of glucose through a number of steps drives this energy conversion to ATP. One of the stages or a cycle is CAC. The space enclosed within the inner membrane of the mitochondria is called the matrix. The enzymes responsible for conducting the CAC are located in the matrix of the mitochondria. Hence, the Option (d) is correct.

Explanation for incorrect answers:

Option (a) is given as cell cytosol. The first stage of the breakdown of glucose is the glycolysis, where the end product is a 3-carbon compound called pyruvate. This reaction takes place in the cytosol in the eukaryotes. The space between the outer as well as the inner mitochondrial membranes and cristae make up the intermediate space, which contains no enzymes for these reactions. Hence, the option (a) is incorrect.

Option (b) is given as mitochondrial intermembrane space. The inner membrane of the mitochondria contains transporter proteins, which transfer the pyruvate to the mitochondrial matrix for further processing. Hence, the option (b) is incorrect.

Option (c) is given as mitochondrial inner membrane. Except glycolysis, all the enzymes for cellular respiration occur mostly in the mitochondrial matrix in the eukaryotes. Hence, the option (c) is incorrect.

Conclusion

The citric acid cycle (CAC) occurs in the matrix of mitochondria in eukaryotes.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
The process of oxidative phosphorylation occurs in the: a. Cytosol  b. Mitochondrial matrix  c. Intermembrane space d. Inner mitrochondrial membrane
In which cellular sublocation do the reactions of glycolysis occur? A. the mitochondrial matrix B. the mitochondrial intermembrane space C. the cytosol D. the endoplasmic reticulum
Where in the cell does glycolysis occur? A. on the outer mitochondrial membrane B. in the endoplasmic reticulum C. in the cytoplasm D. in the fluid of the mitochondria
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Text book image
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Text book image
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Macromolecules | Classes and Functions; Author: 2 Minute Classroom;https://www.youtube.com/watch?v=V5hhrDFo8Vk;License: Standard youtube license