different between macromolecule vs senescence

English

Etymology

macro- +? molecule

Pronunciation

• IPA^(key): /?mæk????m?l?kju?l/
• Hyphenation: ma?cro?mo?le?cule

Noun

macromolecule (plural macromolecules)

1. (chemistry, biochemistry) A very large molecule, especially used in reference to large biological polymers (e.g. nucleic acids and proteins).

Hypernyms

• molecule

Related terms

• macromolecular
• macromolecularly

Translations

English

Etymology

From Latin sen?scere (“to grow old”).

Pronunciation

• IPA^(key): /s?n??s?ns/

Noun

senescence (usually uncountable, plural senescences)

1. (biology) The state or process of ageing, especially in humans; old age.

   Synonyms: oldhood, senectitude, vetustity; see also Thesaurus:old age
2. (cell biology) Ceasing to divide by mitosis because of shortening of telomeres or excessive DNA damage.
   • 2018, University of Edinburgh, "Liver Study Offers Insights into Hard-to-treat Diseases" (9 March 2018), Drug Discovery & Development.

     Tests in mice found that inducing senescence in bile duct cells - mimicking the process seen in human bile duct disease - led to liver scarring and damage of liver function.

3. (gerontology) Old age; accumulated damage to macromolecules, cells, tissues and organs with the passage of time.
4. (botany) Fruit senescence, leading to ripening of fruit.
5. (cytology, of a cell) Condition when the cell ceases to divide.

Related terms

• senescent
• senesce

Translations

See also

• biological immortality
• senility

Further reading

• senescence on Wikipedia.Wikipedia
• cellular senescence on Wikipedia.Wikipedia