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Which organelle is often referred to as the 'powerhouse of the cell' due to its role in ATP production?
Lysosome
Mitochondria
Ribosome
Golgi apparatus
Mitochondria
Mitochondria are double-membrane-bound organelles known as the powerhouse of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP). ATP serves as the primary chemical energy currency for biological processes.
Mitochondria are double-membrane-bound organelles known as the powerhouse of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP). ATP serves as the primary chemical energy currency for biological processes.
Mitochondria act like a power plant in a city; just as a power station converts fuel into electricity to run a city, mitochondria convert nutrients into ATP to run cellular activities.
Mighty Mitochondria makes Money (ATP) for the cell.
C6тАЛH12тАЛO6тАЛ+6O2тАЛтЖТ6CO2тАЛ+6H2тАЛO+Energy┬а(ATP) тАФ The overall equation for aerobic cellular respiration.
ADP+PiтАЛтЖТATP тАФ The chemical reaction catalyzed by ATP synthase.
The mechanism relies on cellular respiration, specifically the electron transport chain located on the inner mitochondrial membrane (cristae). High-energy electrons derived from glucose metabolism drive protons into the intermembrane space, creating an electrochemical gradient. This proton motive force powers the enzyme ATP synthase, which catalyzes the phosphorylation of ADP: ADP+PiтЖТATP.
Mitochondria contain their own circular DNA (mtDNA) and ribosomes (70S), supporting the Endosymbiotic Theory.
The inner membrane is highly folded into structures called cristae to increase surface area for ATP production.
Mitochondria are the site of the Krebs cycle (Citric Acid Cycle) and oxidative phosphorylation.
Efficient energy production via aerobic respiration.
Regulates cellular metabolism and calcium signaling.
Susceptible to oxidative damage due to the production of reactive oxygen species (ROS) during respiration.
Energy supply for muscle contraction.
Powering active transport across cell membranes.
Lysosomes are 'suicide bags' containing digestive enzymes.
Ribosomes are the 'protein factories' of the cell.
Golgi apparatus is the 'post office' or 'packaging center' of the cell.
B is correct тАФ Mitochondria are the organelles responsible for aerobic respiration and the production of ATP.
In competitive exams, remember that mitochondria are absent in mature mammalian red blood cells (RBCs), which rely solely on glycolysis for energy.
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