dna probe
C1Technical / Academic / Scientific
Definition
Meaning
A short single-stranded segment of DNA designed to bind to a specific complementary sequence within a larger DNA sample for detection or isolation purposes.
A tool used in molecular biology, genetics, and diagnostics to identify the presence of a specific nucleotide sequence, crucial for applications like genetic testing, forensic analysis, and pathogen detection.
Linguistics
Semantic Notes
Compound noun always spelled with "DNA" first. While the core meaning is technical, the term is also used metaphorically in contexts like journalism or investigation to imply a precise, targeted search for information.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning. Spelling of related terms may differ (e.g., 'labelling' vs. 'labeling' in probe preparation instructions).
Connotations
Identical in scientific contexts. The metaphorical use (e.g., 'a journalistic DNA probe') is slightly more common in UK media.
Frequency
Slightly higher frequency in US academic literature due to larger volume of biomedical research publishing, but the term is standard in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
The [ADJECTIVE] DNA probe [VERB] to the target sequence.Researchers [VERB] a DNA probe to [VERB] the gene.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “To run a DNA probe on something (metaphorical): to investigate something with precision and targeting.”
Usage
Context Usage
Business
Rare, except in biotech investment contexts discussing a company's diagnostic technology platform.
Academic
Ubiquitous in genetics, molecular biology, medical, and forensic science publications.
Everyday
Virtually never used in casual conversation.
Technical
Standard, precise term in laboratory manuals, research papers, and diagnostic reports.
Examples
By Part of Speech
verb
British English
- The sample will need to be probed with a specific DNA sequence.
- They are probing the genome for mutations.
American English
- We need to probe the tissue sample with a custom DNA probe.
- The lab probed the extract for viral DNA.
adverb
British English
- The gene was probe-positive.
- The sample reacted probe-specifically.
American English
- The assay works probe-dependently.
- It was designed probe-first.
adjective
British English
- The DNA-probe analysis yielded clear results.
- We used a probe-based assay.
American English
- The DNA-probe technique is highly specific.
- Probe hybridization (US: hybridization) was successful.
Examples
By CEFR Level
- Scientists use a DNA probe to find genes. (Simplified)
- A fluorescent DNA probe can bind to a specific virus sequence, allowing for its detection under a microscope.
- The forensic team employed a DNA probe to match the sample from the crime scene.
- The novel diagnostic kit utilises a cocktail of DNA probes, each labelled with a distinct fluorophore, to simultaneously detect multiple antibiotic resistance genes.
- By designing a DNA probe complementary to the mutant allele, researchers could directly visualise the cancerous cells in the biopsy sample.
Learning
Memory Aids
Mnemonic
Think of a PROBE as a precise, tiny submarine (the DNA sequence) sent into the vast ocean of a genome to find and dock with one specific ship (the target sequence).
Conceptual Metaphor
A MAGNETIC KEY; something designed to seek out and bind exclusively to one specific lock within a massive, tangled pile of locks.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation like "ДНК зонд". The standard Russian equivalent is "ДНК-зонд" (with a hyphen) or more commonly "ДНК-проба" or "гибридизационный зонд". "Probe" is not a false friend, but the specific compound is a set term.
Common Mistakes
- Incorrect plural: 'DNAs probes' (correct: 'DNA probes'). Incorrect article: 'a DNA probe' (correct, as it's pronounced 'dee-en-ay'). Misspelling: 'DNA prob'.
Practice
Quiz
What is the primary function of a DNA probe?
FAQ
Frequently Asked Questions
It is a compound noun written as two words: 'DNA probe'.
While the standard term refers to DNA, there are analogous tools called 'RNA probes'. The principle is similar, but the material differs.
No. While both are short DNA sequences, a primer is designed to initiate DNA synthesis (replication), whereas a probe is designed purely for binding and detection, often requiring a detectable label.
It is foundational in molecular biology, genetic research, clinical diagnostics (especially for genetic diseases and pathogens), and forensic science.