Enzymes found attached to inner membrane of mitochondria instead of matrix is.?

Question

Answer

Succinate dehydrogenase is attached to the inner mitochondrial membrane. All the other enzymes of the Krebs cycle are located within the matrix of mitochondria, though.

Answer

The reason behind this lies in the properties of FAD+. Unlike NAD+, FAD+ is not free to diffuse within the mitochondrion, it is an integral part of the inner mitochondrial membrane. Its reduced form FADH2 contributes electrons directly to ETC.

Answer

Enzymes Attached to the Inner Membrane of Mitochondria

Mitochondria are double-membraned organelles found in eukaryotic cells, responsible for producing energy in the form of ATP through cellular respiration. They possess an outer membrane and an inner membrane, which are separated by an intermembrane space. The inner membrane of mitochondria plays a crucial role in various metabolic processes, including the electron transport chain and oxidative phosphorylation.

Reasons for Enzymes to be Attached to the Inner Membrane

Several enzymes are found attached to the inner membrane of mitochondria rather than being located in the matrix. This arrangement has several advantages, including:

1. Efficient Energy Production: The enzymes attached to the inner membrane are involved in the electron transport chain, which is a crucial step in ATP synthesis. By being closely associated with the electron carriers embedded in the inner membrane, these enzymes can facilitate efficient energy production.

2. Structural Integrity: The enzymes attached to the inner membrane help maintain the structural integrity of the mitochondria. The inner membrane is highly folded into structures known as cristae, which increase its surface area. By being attached to the inner membrane, enzymes contribute to stabilizing the cristae structure, allowing for optimal function.

3. Compartmentalization: The inner membrane of mitochondria acts as a barrier, separating the mitochondrial matrix from the intermembrane space. The attachment of enzymes to the inner membrane helps compartmentalize different metabolic pathways. This organization facilitates the control and regulation of specific reactions within the mitochondria, ensuring efficient energy production.

4. Electron Transport Chain: The inner membrane of mitochondria is the site where the electron transport chain takes place. This process involves a series of redox reactions where electrons are passed from one enzyme complex to another. By being attached to the inner membrane, the enzymes involved in the electron transport chain can efficiently transfer electrons and contribute to the generation of an electrochemical gradient essential for ATP synthesis.

Conclusion

Enzymes attached to the inner membrane of mitochondria play a crucial role in energy production and overall mitochondrial function. Their attachment allows for efficient energy generation, structural stability, compartmentalization, and the facilitation of the electron transport chain. Understanding the organization and function of these enzymes provides valuable insights into the complex processes occurring within mitochondria.

Similar NEET Doubts

Which of the following statements regarding mitochondria is incorrect?

Most of the enzymes of the TCA cycle are present in

Assertion : The inner membrane of mitochondria contains systems involving electron transport.Reason : The mitochondrial matrix contains enzymes of Krebs cycle.

Where does TCA cycle takes place

enzymes found in the both membrane of mitochondria Related: Eukaryotic:Cell Organelles?

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Suggested Free Tests

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company