Q:

How big are mitochondria?

A:

Quick Answer

Mitochondria range in diameter from 0.5 to 1 micrometer in diameter. Mitochondria are typically round or oval in shape. They are found in the cytoplasm of nearly all eukaryotic cells, which are cells with clearly defined nuclei.

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Full Answer

The primary function of mitochondria is to produce large amounts of energy in the form of ATP, or adenosine triphosphate. Mitochondria also generate heat, store calcium and mediate both cell growth and death. In humans, mitochondria are not present in all cells, and the amount per cell varies. For instance, red blood cells do not contain any mitochondria, and liver cells can contain hundreds up to thousands of mitochondria.

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Related Questions

  • Q:

    Are mitochondria found in the cytoplasm?

    A:

    Mitochondria are membrane-bound organelles that are found in the cytoplasm of eukaryotic cells. They are essential cells in the human body and are found virtually in every cell in the body.

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  • Q:

    What do mitochondria give off during cellular respiration?

    A:

    Mitochondria give off water, carbon dioxide and energy, in the form of ATP molecules, during cellular respiration. Mitochondria produce these by combining glucose and oxygen molecules, which creates the molecules and releases large amounts of energy. This is the main process by which most organisms meet their energy needs.

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  • Q:

    What does mitochondria do in a cell?

    A:

    Mitochondria generate the energy that a cell needs to function properly. They are often described as the powerhouse of the cell. They are also involved in signaling, cellular differentiation, cell death, maintenance of cell growth and control of the cell cycle.

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  • Q:

    What are microtubules?

    A:

    Microtubules are hollow tubes about 20 to 25 nanometers in diameter that function in cell movement and provide structure within the cell. These tubes consist of subunits, called heterodimers, composed of two closely related molecules, called alpha-tubulin and beta-tubulin, that are structurally bound to one another. Each microtubule unit consists of a wall made up of 13 subunits of alpha- and beta-tubulin heterodimers, which are called protofilaments.

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