Concept
Transformation
Uptake of free environmental DNA
trans-for-MAY-shun
High-yield clue
Transformation is uptake of naked (free) DNA from the surroundings by a naturally competent cell.
Overview
Horizontal gene transfer in which a competent bacterium takes up naked DNA released into its environment and incorporates it into its genome. Griffith's pneumococcus experiment is the classic teaching example.
Classification
- Horizontal gene transfer
- Uptake of naked DNA
- Requires competence
- Homologous recombination
Lab & identification clues
- Natural-competence vocabulary
- Griffith transforming-principle concept
- Naked extracellular DNA source
Associations
- Capsule-gene transfer in pneumococcus teaching
- No vector or contact required
- Basis of molecular-cloning transformation
Commonly confused with
- Transduction
- Conjugation
Frequently asked questions
What is Transformation?
Horizontal gene transfer in which a competent bacterium takes up naked DNA released into its environment and incorporates it into its genome. Griffith's pneumococcus experiment is the classic teaching example.
What is the high-yield clue for Transformation?
Transformation is uptake of naked (free) DNA from the surroundings by a naturally competent cell.
What is Transformation associated with?
Transformation is associated with Capsule-gene transfer in pneumococcus teaching, No vector or contact required, and Basis of molecular-cloning transformation.
What is Transformation commonly confused with?
Transformation is commonly confused with Transduction and Conjugation.
Original microbiology concept summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC/WHO topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment selection, infection-control instructions, or specimen-handling guidance.