Mitochondrial Structure and Function

The video explains how the mitochondrion is adapted for cell respiration. It covers the structure of mitochondria, including the inner and outer membranes, cristae, intermembrane space, and matrix. The outer membrane protects the mitochondrion, while the inner membrane hosts the electron transport chain and ATP synthase. Cristae increase surface area for more proteins. The intermembrane space's small volume aids in rapid proton gradient formation. The matrix contains enzymes for the Krebs cycle. Electron tomography provides a 3D view of mitochondria.

What is the primary function of the outer membrane in mitochondria?

• To increase surface area for reactions

• To protect the mitochondrion and maintain internal conditions

• To house the electron transport chain

• To contain enzymes for the Krebs cycle

How does the outer membrane contribute to the formation of the intermembrane space?

• By working with the inner membrane

• By containing ATP synthase

• By maintaining a high pH

• By folding into cristae

How does the inner membrane's structure benefit its function?

• It is smooth to allow easy passage of molecules

• It is folded to increase surface area for more electron transport chains

• It is thick to provide structural support

• It is permeable to all ions

Which part of the mitochondrion is responsible for housing ATP synthase?

• Outer membrane

• Matrix

• Inner membrane

• Intermembrane space

What is the significance of the cristae in mitochondria?

• They protect the mitochondrion from the rest of the cell

• They increase the surface area for electron transport chains

• They contain enzymes for the Krebs cycle

• They form the boundary of the intermembrane space

Why is the small volume of the intermembrane space advantageous?

• It enhances the structural integrity of the mitochondrion

• It increases the number of cristae

• It provides more space for ATP synthase

• It allows for rapid generation of a proton gradient

What is the role of the intermembrane space in chemiosmosis?

• To house the Krebs cycle enzymes

• To protect the inner membrane

• To increase the surface area for reactions

• To generate a proton gradient quickly

What role does the matrix play in mitochondria?

• It houses the electron transport chain

• It contains enzymes for the Krebs cycle and link reaction

• It forms the outer boundary of the mitochondrion

• It increases the surface area for reactions

What is the purpose of electron tomography in studying mitochondria?

• To measure the pH of the matrix

• To visualize the 3D structure of mitochondria

• To count the number of cristae

• To analyze the chemical composition of the membranes

Which process is facilitated by the enzymes in the mitochondrial matrix?

• Formation of cristae

• Krebs cycle and link reaction

• Chemiosmosis

• Electron transport chain