← USMLE Step 1 Syllabus
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USMLE Step 1 Biology Syllabus 2027

8 chapters — Complete topic-wise breakdown

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1

Diversity in Living World

  • •Classification
  • •Plant Kingdom
  • •Animal Kingdom
  • •Viruses and Bacteria
2

Cell Structure and Function

  • •Cell Theory
  • •Cell Organelles
  • •Cell Division
  • •Biomolecules
3

Plant Physiology

  • •Photosynthesis
  • •Respiration
  • •Plant Growth
  • •Transport in Plants
4

Human Physiology

  • •Digestion
  • •Circulation
  • •Excretion
  • •Nervous System
  • +1 more topics
5

Reproduction

  • •Reproduction in Plants
  • •Human Reproduction
  • •Reproductive Health
  • •Embryonic Development
6

Genetics and Evolution

  • •Mendelian Genetics
  • •DNA and RNA
  • •Gene Expression
  • •Evolution
7

Biotechnology

  • •Genetic Engineering
  • •Biotechnology Applications
  • •Recombinant DNA
  • •Bioethics
8

Ecology and Environment

  • •Ecosystems
  • •Biodiversity
  • •Environmental Issues
  • •Population Ecology

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