Question

BIOLOGY QUESTION
Give a note on Mitochondria
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Answer 1

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✔Mitochondria is a double membrane bound organelle. It has two membranes:Inner ando outer.

✔The outer membrane resembles a sieve. It is wavy.Outer membrane is chemically 40% lipid and 60% proteins.

✔The inner membrane is selectively permeable. It has number of infoldings called the cristae. Inner membrane is chemically 80% protein and 20% lipid. It is rich in cardiolipins.

✔Mitochondria is the main site of aerobic respiration. t

✔The energy (ATP) produced in the mitochondria helps to perform various energy requiring processes of the cell like muscle contraction, nerve impulse conduction.

✔ It is because of the formation of ATP, mitochondria called powerhouse of the cell .

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Answer 2

Mitochondria (sing. mitochondrion) are organelles, or parts of a eukaryote cell. They are in the cytoplasm, not the nucleus.

They make most of the cell's supply of adenosine triphosphate (ATP), a molecule that cells use as a source of energy. Their main job is to convert energy. They oxidise glucose to provide energy for the cell. The process makes ATP, and is called cellular respiration. This means mitochondria are known as "the powerhouse of the cell.

In addition to supplying cellular energy, mitochondria are involved in a range of other processes, such as signalling, cellular differentiation, cell death, as well as the control of the cell division cycle and cell growth.

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