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Cell Biology · StudyTab× +
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Cell Biology×+ AI
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The Cell: Unit of Life

⚡ Mitochondria: the powerhouse

Mitochondria make most of the cell's energy as ATP, through cellular respiration1. They even have their own DNA and ribosomes.

  • Double membrane2: the inner one folds into cristae to fit more enzymes.
  • Found in almost every cell, except mature red blood cells.
Fig 1 · Mitochondrion
💡 Exam tip: very active cells, like muscle cells, have more mitochondria.
‹Cell BiologyHandwritten · Page 2 of 4AI
T Convert to text
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9:41
✕Biology9 of 24 due today⋯
Biology · Class 11
What is the powerhouse of the cell?
Mitochondria
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NEET UGJEE MAIN · ADVUPSC CSESSC CGLCATGATEState PSCCBSE 10 · 12CUET NEET UGJEE MAIN · ADVUPSC CSESSC CGLCATGATEState PSCCBSE 10 · 12CUET

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What is the powerhouse of the cell?Mitochondria
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Ribosome✓ MitochondriaGolgi body
📝Summary
  • Makes energy (ATP)
  • Has its own DNA
  • Inner folds: cristae
💬Doubts
Why more in muscles?They need more energy.p.12

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Cell BiologyAI Tutor open
8.5.4 Mitochondria

Mitochondria are the sites of aerobic respiration. They produce cellular energy in the form of ATP, hence called the 'power houses' of the cell.

The inner membrane forms infoldings called cristae.

— NCERT Biology · p.12

Why is it called the powerhouse?
It makes most of the cell's energy as ATP. p.12
Explain more simply
Think of it as the cell's power plant: it turns food into energy the cell can use. p.12
Ask about this chapter…➤
Doubt SolverPhysics
A ball thrown up at 20 m/s…
Your photoQ7 · Motion in a straight line
Givenu = 20 m/s · v = 0 at top · g = 10 m/s²
FindMaximum height h
Approachv² = u² − 2gh
  1. 0 = 20² − 2 × 10 × h
  2. 20h = 400
  3. h = 20 m
💡 At the top, speed is 0 but acceleration is still g.
Answer reportBoard · Biology
Double membrane… cristae ✓
Q. Structure of mitochondria5 marks · your handwritten answer
3/5Indicative marksfrom your written answer
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Double membrane and cristae, clearly explained.

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No mention of ATP, own DNA, or a labelled diagram.

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PDFBiology Ch 5p.84
5.2 Law of Independent Assortment

In a dihybrid cross, the F2 generation shows a 9:3:3:1 ratio.

A test cross reveals whether a dominant parent is pure or hybrid.

True / False

Linked genes assort independently.

MCQ

Which law comes from the dihybrid cross?

Fill in★ High-yield

A dihybrid cross gives an F2 ratio of  9:3:3:1 

18questions ready
NEET Biology · Due first9 / 24
Which organelle makes most of the cell's ATP?
Mitochondria
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Animal Cell
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Living WorldCellInheritanceMolecular BasisPhysiologyRevision
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    Weak · 12 dueReview 12 due
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