Where Are Macronucleus Found?

James H. Sterling
James H. Sterling
• • 6 min read

Macronucleus, Relatively Large Nucleus Believed to Influence Many Cell Activities. It Occurs in Suctorian and Ciliate Protozoans (E. G. , Paramecium Paramecium...

Where Are Macronucleus Found?

Macronucleus, relatively large nucleus believed to influence many cell activities. It occurs in suctorian and ciliate protozoans (e.g., Paramecium

Paramecium
Paramecium vary in length from about 0.05 to 0.32 mm (0.002 to 0.013 inch). Their basic shape is an elongated oval with rounded or pointed ends, such as in P. caudatum. The term paramecium is also used to refer to individual organisms in a Paramecium species.
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What is the source of a cell's macronucleus?

The macronucleus is derived from the micronucleus by the process of DNA polytenisation. The macronucleus is a polyploid in contrast to the micronucleus, which is diploid. The macronucleus contains multiple sets of chromosomes and in which the DNA is actively transcribed.

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What is the function of a macronucleus?

The micronucleus plays a major role during sexual reproduction (conjugation) and is often considered an analog of a “germline” nucleus. The second type of nucleus, the macronucleus, is responsible for all nuclear transcription during asexual growth and is thus often referred to as a “somatic” nucleus.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist
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James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.