episome: meaning, definition, pronunciation and examples
Very LowTechnical/Scientific
Quick answer
What does “episome” mean?
A genetic element in bacteria that can replicate independently of the chromosome or integrate into it.
Audio
Pronunciation
Definition
Meaning and Definition
A genetic element in bacteria that can replicate independently of the chromosome or integrate into it.
In molecular biology, any extrachromosomal DNA molecule that can exist autonomously or integrate into a host genome. Historically, the term was also used for certain types of plasmids with this dual lifestyle.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Pronunciation may differ slightly.
Connotations
None.
Frequency
Equally rare in both scientific registers.
Grammar
How to Use “episome” in a Sentence
The [NOUN] exists as an episome.The [PLASMID] can function as an episome.Vocabulary
Collocations
Examples
Examples of “episome” in a Sentence
adjective
British English
- The episomal state of the DNA was confirmed.
- Episomal vectors are useful for transient expression.
American English
- The episomal state of the DNA was confirmed.
- Episomal vectors are useful for transient expression.
Usage
Meaning in Context
Business
Not used.
Academic
Used exclusively in advanced biology, genetics, and microbiology contexts, often with a historical perspective.
Everyday
Not used.
Technical
The primary domain. Refers to a specific class of bacterial genetic elements with dual replication modes.
Vocabulary
Synonyms of “episome”
Vocabulary
Antonyms of “episome”
Watch out
Common Mistakes When Using “episome”
- Using 'episome' as a general synonym for any plasmid (not all plasmids are episomes).
- Confusing 'episome' with 'episodic' or 'episode'.
- Spelling as 'episome' (correct) vs. 'episom' (incorrect).
FAQ
Frequently Asked Questions
Not exactly. All episomes are plasmids, but not all plasmids are episomes. An episome is a specific type of plasmid that can integrate into the host chromosome.
Almost exclusively in advanced textbooks and research papers in genetics and microbiology. It is a specialised technical term.
The 'F factor' (fertility factor) in E. coli bacteria is the classic example. It allows for bacterial conjugation and can exist freely or integrated.
The more general term 'plasmid' is often used, and specific types (e.g., 'integrative plasmid') are named for their function. 'Episome' remains useful for describing the dual-replication lifestyle.
A genetic element in bacteria that can replicate independently of the chromosome or integrate into it.
Episome is usually technical/scientific in register.
Episome: in British English it is pronounced /ˈɛpɪsəʊm/, and in American English it is pronounced /ˈɛpɪsoʊm/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of EPI + SOME. EPI- (meaning 'upon' or 'in addition to') + SOME (like a body). It's an 'extra body' of DNA that can sit on top of or within the main chromosome.
Conceptual Metaphor
A satellite with a docking port: It can orbit independently (replicate autonomously) or dock with the main station (integrate into the chromosome).
Practice
Quiz
What is the defining characteristic of an episome?