Podcast
Questions and Answers
What is the main function of mitochondria in the cell?
What is the main function of mitochondria in the cell?
- Storing genetic information
- Producing ATP, the cell's energy currency (correct)
- Producing glucose for the cell
- Synthesizing proteins
What structural feature of the inner membrane increases the surface area for ATP production?
What structural feature of the inner membrane increases the surface area for ATP production?
- Outer membrane
- Cristae (correct)
- Chloroplasts
- Matrix
What is unique about mitochondrial DNA compared to nuclear DNA?
What is unique about mitochondrial DNA compared to nuclear DNA?
- It is linear, like human DNA.
- It is found in the nucleus of the cell.
- It is circular and similar to bacterial DNA. (correct)
- It is larger than nuclear DNA.
Where does glycolysis take place within the cell?
Where does glycolysis take place within the cell?
Which of the following statements about the number of mitochondria in a cell is true?
Which of the following statements about the number of mitochondria in a cell is true?
What process occurs within the mitochondria to produce most of the cell's ATP?
What process occurs within the mitochondria to produce most of the cell's ATP?
Why are mitochondria referred to as the 'powerhouse' of the cell?
Why are mitochondria referred to as the 'powerhouse' of the cell?
Which of the following statements about the outer membrane of mitochondria is correct?
Which of the following statements about the outer membrane of mitochondria is correct?
Flashcards
Mitochondria Function
Mitochondria Function
Mitochondria are organelles that produce ATP, the cell's energy source, through cellular respiration.
Mitochondria Structure
Mitochondria Structure
Mitochondria have two membranes: a smooth outer membrane and a folded inner membrane (cristae) that increases surface area for energy production; the matrix contains enzymes for the Krebs cycle.
Mitochondria Number
Mitochondria Number
The number of mitochondria per cell varies widely, from zero in some cells to over 2000 in liver cells.
Mitochondrial DNA
Mitochondrial DNA
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ATP Production Process
ATP Production Process
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Glycolysis
Glycolysis
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Kreb's Cycle Location
Kreb's Cycle Location
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Cristae Function
Cristae Function
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Matrix Location
Matrix Location
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Mitochondria Size Range
Mitochondria Size Range
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Study Notes
Mitochondria Structure and Function
- Mitochondria are double-membrane organelles, often called the "powerhouses" of the cell.
- Their size ranges from 0.5 to 1.0 μm in diameter.
- They are responsible for producing ATP (adenosine triphosphate), the cell's main energy source, through cellular respiration.
Mitochondrial Membranes
- Outer membrane: Smooth and permeable to small molecules.
- Inner membrane: Folded into cristae, increasing surface area for ATP production.
- Matrix: Contains enzymes for the Krebs cycle.
Mitochondrial Number
- The number of mitochondria in a cell varies greatly.
- Some cells have no mitochondria, while others, like liver cells, can have over 2000.
Mitochondrial DNA
- Most of a cell's DNA is in the cell's nucleus.
- Mitochondria contain their own independent circular DNA (mtDNA).
Energy Production Overview
- Glycolysis occurs in the cytoplasm, breaking down glucose into pyruvate, releasing some energy
- The Krebs cycle takes place inside the mitochondria, further breaking down pyruvate to produce ATP
- Mitochondria require oxygen for efficient ATP production.
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