Table of Contents
Is intermembrane space same as matrix?
Mitochondria contain inner and outer membranes, separated by a intermembrane space (C-side) and the space enclosed by the inner membrane is called matrix (M-side) (Fig. 11.1). The intermembrane space is usually 60–80 Å in width and contains some enzymes.
Is the inner mitochondrial membrane the same as the matrix?
The inner mitochondrial membrane (IMM) is the mitochondrial membrane which separates the mitochondrial matrix from the intermembrane space. It contains five major protein complexes where in aerobic respiration the energy of oxygen is released and enables the synthesis of ATP via chemiosmosis.
Is the mitochondrial matrix the intermembrane space?
Mitochondria contain two aqueous subcompartments, the matrix and the intermembrane space (IMS). The matrix is enclosed by both the inner and outer mitochondrial membranes, whilst the IMS is sandwiched between the two.
Is the matrix more acidic than the intermembrane space?
The intermembrane space is more acidic than the matrix. The electron transport chain pumps H+ from the matrix into the intermembrane space. This makes the intermembrane space more acidic (higher H+ concentration/lower pH) than the matrix.
What is the matrix in a mitochondria?
The mitochondrial matrix is the site of the tricarboxylic acid (TCA) cycle, a series of enzymatic reactions initiated by the conversion of pyruvate and fatty acids to acetyl coenzyme A (acetyl-CoA). Pyruvate and fatty acids are transported into mitochondria from the cytoplasm by membrane-bound permeases.
What is the meaning of intermembrane space?
The intermembrane space (IMS) is the space occurring between or involving two or more membranes. In cell biology, it is most commonly described as the region between the inner membrane and the outer membrane of a mitochondrion or a chloroplast.
What is a matrix in a mitochondria?
What is the intermembrane space in mitochondria?
Where is the mitochondrial matrix?
The inner and outer membranes of mitochondria define three compartments within the organelle, each with its distinct role and corresponding protein components. The innermost compartment, surrounded by the inner membrane, is the mitochondrial matrix.
Why does the mitochondrial intermembrane space have a lower pH than the matrix?
This means that the protons need to be pumped across the inner mitochondrial membrane into the intermembrane space. This results in the intermembrane space having the lowest pH in the mitochondria, due to the high proton concentration.
Is mitochondrial matrix more acidic?
Mitochondrial matrix has a pH of about 7.8, which is higher than the pH of the intermembrane space of the mitochondria, which is around 7.0–7.4.
What is special about the matrix in the mitochondria?
The mitochondrial matrix has several functions. It is where the citric acid cycle takes place. This is an important step in cellular respiration, which produces energy molecules called ATP. It contains the mitochondrial DNA in a structure called a nucleoid.
What is the function of the matrix?
In mathematics, a function maps an input value to an output value. In the case of a matrix function, the input and the output values are matrices. One example of a matrix function occurs with the Algebraic Riccati equation, which is used to solve certain optimal control problems.
Does the mitochondrial matrix have a lower pH than the intermembrane space?
Is the pH lower in the matrix or the intermembrane space?
What does the intermembrane space do in the mitochondria?
It also refers to the space between the inner and outer nuclear membranes of the nuclear envelope, but is often called the perinuclear space. The IMS of mitochondria plays a crucial role in coordinating a variety of cellular activities, such as regulation of respiration and metabolic functions.
Why is the inside of mitochondria called the matrix?
In the mitochondrion, the matrix is the space within the inner membrane. The word “matrix” stems from the fact that this space is viscous, compared to the relatively aqueous cytoplasm.
What is the function of the intermembrane compartment of the mitochondria?
The intermembrane space, as implied, is the region between the inner and outer membranes. It has an important role in the primary function of mitochondria, which is oxidative phosphorylation. The matrix contains the enzymes that are responsible for the citric acid cycle reactions.
What is the role of matrix in mitochondria?
Function. The mitochondrial matrix is the site of the tricarboxylic acid (TCA) cycle, a series of enzymatic reactions initiated by the conversion of pyruvate and fatty acids to acetyl coenzyme A (acetyl-CoA). Pyruvate and fatty acids are transported into mitochondria from the cytoplasm by membrane-bound permeases.