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Mitochondria: The Powerhouse of the Cell

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Mitochondria: The Powerhouse of the Cell

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Questions and Answers

What is the primary function of the inner membrane of the mitochondria?

To allow the passage of all small molecules

To provide a barrier between the matrix and the cytoplasm

To synthesize mitochondrial DNA and proteins

To increase the surface area for enzyme attachment (correct)

What is the purpose of the intermembrane space between the inner and outer membranes of the mitochondria?

To contain cytochrome c and other proteins involved in the electron transport chain (correct)

To house the ribosomes that synthesize mitochondrial proteins

To store ATP produced during cellular respiration

To contain the enzymes for the Krebs cycle

How do the cristae in the inner membrane of the mitochondria contribute to the organelle's function?

They provide a space for the storage of ATP produced during the process

They increase the surface area for enzyme attachment, improving the efficiency of cellular respiration (correct)

They facilitate the transport of materials in and out of the mitochondria

They act as a barrier to prevent the leakage of substances from the matrix

What is the primary role of the outer membrane of the mitochondria?

To allow the passage of small molecules in and out of the mitochondria (A) Signup and view all the answers

What is the main difference between the inner and outer membranes of the mitochondria?

The outer membrane is smooth, while the inner membrane is folded into cristae (A) Signup and view all the answers

What is the primary function of the mitochondrial matrix?

To contain the enzymes for the Krebs cycle and fatty acid oxidation (B) Signup and view all the answers

How do the cristae in the inner membrane of the mitochondria vary in shape and arrangement?

They can be densely or sparsely packed, and their shape varies depending on the cell type (A) Signup and view all the answers

What is the primary role of the transport proteins found in the inner membrane of the mitochondria?

To facilitate the movement of small molecules in and out of the matrix (C) Signup and view all the answers

Which of the following statements about mitochondria is true?

Mitochondria are responsible for cellular respiration and energy production. (D) Signup and view all the answers

What is the typical size range of mitochondria?

0.5 - 1.0 micrometers (A) Signup and view all the answers

How can mitochondria change their shape?

Mitochondria can change their shape from spherical to oval or rod-shaped. (D) Signup and view all the answers

Where are mitochondria typically located within a cell?

In the cytoplasm (D) Signup and view all the answers

Which of the following cell types is likely to have a higher number of mitochondria?

Muscle cells (C) Signup and view all the answers

What is the purpose of the fatty droplets located near mitochondria in muscle cells?

To provide energy for cellular respiration (D) Signup and view all the answers

How do mitochondria reproduce?

They divide themselves in the middle to produce two daughter mitochondria. (A) Signup and view all the answers