What it is
The Independent Question Bank collects official discrete (non-passage) questions organized by subject: biology, biochemistry, chemistry, physics, psychology, and sociology.
Because there is no passage to lean on, IQB questions give you a clean read on raw content and concept fluency across C/P, B/B, and P/S.
How a Retaker gets the most from it
Use IQB blocks as content thermometers. A rough IQB block in one subject is a strong signal to revisit that content area before layering on more passage practice.
Keep blocks small (Pillar's plan uses 25-question blocks per subject) and review immediately while your reasoning is fresh.
On a retake, IQB is especially useful early: it quickly maps which content actually survived the gap since your last test date.
Where it lands in a retake plan
Pillar Prep's plan schedules one IQB block per subject across the middle of prep, sequenced by your weakest sections first, alongside the Q Packs and before the Section Bank peak.
Pillar Prep's study plans are built around official AAMC material because it is the gold standard for MCAT practice. If you want a personalized schedule that places every AAMC resource for you, start with the free Retaker Calculator or explore The Retaker Course. You can also see how a plan is structured on our 3-month retake schedule guide.