Podcast
Questions and Answers
What is the function of the outer membrane of a mitochondrion?
What is the function of the outer membrane of a mitochondrion?
- To allow easy access of small, water-soluble molecules into the intermembrane space (correct)
- To provide selective barrier control
- To form cristae
- To control what ions and molecules can enter the matrix
What is the typical diameter of mitochondria?
What is the typical diameter of mitochondria?
- 1 nm
- 1 μm (correct)
- 10 μm
- 100 nm
What structure in the mitochondrion is folded to form finger-like cristae?
What structure in the mitochondrion is folded to form finger-like cristae?
- Outer membrane
- Matrix
- Intermembrane space
- Inner membrane (correct)
What is the space between the two membranes of a mitochondrion called?
What is the space between the two membranes of a mitochondrion called?
Which membrane of a mitochondrion is described as a far more selective barrier?
Which membrane of a mitochondrion is described as a far more selective barrier?
What is the primary function of the cristae in mitochondria?
What is the primary function of the cristae in mitochondria?
Which nutrient sources are utilized in the production of ATP in mitochondria?
Which nutrient sources are utilized in the production of ATP in mitochondria?
Where does the electron transport chain take place in mitochondria?
Where does the electron transport chain take place in mitochondria?
Which process directly drives the synthesis of ATP in mitochondria?
Which process directly drives the synthesis of ATP in mitochondria?
What is the role of mitochondrial DNA in ATP production?
What is the role of mitochondrial DNA in ATP production?
How do the cristae in mitochondria contribute to cellular energy production?
How do the cristae in mitochondria contribute to cellular energy production?
What is the main function of the Krebs Cycle?
What is the main function of the Krebs Cycle?
Where do the eight chemical reactions of the Krebs Cycle take place?
Where do the eight chemical reactions of the Krebs Cycle take place?
Which molecule is responsible for encoding essential proteins related to mitochondrial function?
Which molecule is responsible for encoding essential proteins related to mitochondrial function?
What is the primary role of mitochondria in cellular homeostasis?
What is the primary role of mitochondria in cellular homeostasis?
Which organelle is responsible for the synthesis, degradation, and replacement of mitochondria?
Which organelle is responsible for the synthesis, degradation, and replacement of mitochondria?
In the electron transport chain, where are the components located that are encoded by mitochondrial DNA?
In the electron transport chain, where are the components located that are encoded by mitochondrial DNA?
Study Notes
- Mitochondria have a complex structure, as shown in Figures 1.16, 1.22, 12.13, and 12.14.
- They are typically around 1 μm in diameter and can take various shapes, often resembling sausages as depicted in Figure 1.22.
- Mitochondria are enclosed by two membranes: an outer membrane and an inner membrane.
- The inner membrane is folded into finger-like projections called cristae, which extend into the matrix.
- The intermembrane space lies between the two membranes.
- The outer membrane includes a transport protein named porin, forming wide aqueous channels for easy penetration of small, water-soluble molecules from the cytoplasm into the intermembrane space.
- The inner membrane acts as a selective barrier, controlling what ions and molecules enter the matrix.
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Description
Explore the structure of mitochondria as seen through an electron microscope, including details on their size, shape, membranes, cristae, matrix, and intermembrane space. Learn about the functions and features of mitochondria.
