Molecular diagnostics
Read the topic background here, then explore the labeled visual and structured learning explanations on this page.
Read explanation on this page ↓ See diagram ↓Molecular diagnostics — on-site reading
An introductory overview for this topic. The article introduction is reproduced here, so you do not need to leave MedAtlas to read it. It may not match the latest official medical guidance.
Molecular diagnostics is a collection of techniques used to analyze biological markers in the genome and proteome, and how their cells express their genes as proteins, applying molecular biology to medical testing. In medicine the technique is used to diagnose and monitor disease, detect risk, and decide which therapies will work best for individual patients, and in agricultural biosecurity similarly to monitor crop- and livestock disease, estimate risk, and decide what quarantine measures must be taken.
By analysing the specifics of the patient and their disease, molecular diagnostics offers the prospect of personalised medicine.
These tests are useful in a range of medical specialties, including infectious disease, oncology, human leucocyte antigen typing (which investigates and predicts immune function), coagulation, and pharmacogenomics—the genetic prediction of which drugs will work best. They overlap with clinical chemistry (medical tests on bodily fluids).
How this connects to Biochemistry
Molecular investigation links DNA variation and gene regulation to RNA, proteins and cellular function. Assays measure selected molecular features with finite sensitivity and specificity; a detected variant or transcript does not automatically establish biological causation or a clinical diagnosis.
Text credit: Wikipedia contributors, “Molecular diagnostics”, original article · authors & revision history · CC BY-SA 4.0. Unmodified opening extract, accessed 24 September 2026. This Wikipedia-derived section is provided under CC BY-SA 4.0; the independent MedAtlas notes and design are separate works.
Molecular diagnostics · visual study map
Scalable vector illustration. Labeled conceptual map, not a precise anatomical, histological or diagnostic image.The wording in this learning map is adapted from the attributed Wikipedia background section below (CC BY-SA 4.0).
What the underlying subject studies
Biochemistry explains biological function through molecules, enzymes, energetic coupling and regulation. Map the principal substrates and products of a reaction, identify the relevant cellular compartment, and distinguish direct energy output from energy transferred to cofactors.
How mechanisms and evidence connect
Metabolic pathways form a network rather than isolated cycles. A pathway’s flux depends on enzyme activity, substrate availability, hormonal signals, cell type and the body’s nutritional or disease state. Single reaction diagrams intentionally simplify complex regulation.
How to develop a sound explanation
For study, draw input → key steps → output. Mark where energy is invested or recovered, identify irreversible or regulated steps, and relate abnormal biomarkers to possible processes without using them alone to diagnose a patient.
References and verification (optional)
All reading material on this page appears above. The links below are for checking the primary syllabus, research or source attribution, not requirements for opening this lesson.
NMC official CBME Curriculum 2024 and current regulations index ↗