MRCS Part A: format, blueprint, and how to revise it

Unlike most royal college written exams, both papers of MRCS Part A are sat on the same day, one after the other.

• Paper 1, Applied Basic Sciences: 180 single best answer questions in 180 minutes.
• Paper 2, Principles of Surgery in General: 120 single best answer questions in 120 minutes.

Every question is single best answer with five options. There is no extended matching and no image-dependent item, so the whole exam turns on reading a stem and choosing the one best answer against the surgical sciences.

The ICBSE publishes a per-topic question-count table for both papers, so unusually for these exams the blueprint weighting is a published fact rather than an estimate. Applied surgical anatomy is by far the largest single domain, followed by physiology and the common surgical conditions.

• Applied Surgical Anatomy — about a quarter of the exam.
• Applied Surgical Physiology and Common Surgical Conditions — the next largest blocks.
• Applied Surgical Pathology and Perioperative Management — substantial.
• Trauma and the multiply injured patient — a fixed share.
• Pharmacology for surgery and surgical care of children — small but examined.

The practical consequence is blunt: anatomy earns the most marks, so it deserves the most time, and the small domains still appear every sitting and cannot be skipped entirely.

Because the weighting is published, the most efficient plan is to mirror it rather than spread attention evenly. Spend on anatomy and physiology in rough proportion to their share of the paper, keep the small domains ticking over so they are not a surprise, and let the clock be part of practice from the start given the near-one-minute-per-item pace.

That is exactly how the SpecialityMCQs MRCS revision is built: each session's domain mix follows the ICBSE's own weighting, it tilts toward whichever domain is currently costing you marks, and anything you get wrong returns on a spacing schedule so it is met again before it fades. Every answer names the reference or guideline it rests on.