First Aid chapter deck
First Aid Biochemistry — Flashcards for the Densest Step 1 Chapter
Biochemistry is where First Aid readers stall. Metabolic pathways, enzyme deficiencies, lysosomal storage diseases — 60 pages of the highest-density facts on Step 1.
The First Aid biochemistry chapter is roughly 60 pages and covers glycolysis, gluconeogenesis, TCA cycle, electron transport chain, pentose phosphate pathway, glycogen metabolism, amino acid metabolism, urea cycle, fatty acid synthesis and oxidation, ketone bodies, cholesterol synthesis, nucleotide metabolism, DNA/RNA structure, and around 30 named enzyme deficiencies (lysosomal storage diseases, glycogen storage diseases, urea cycle disorders, amino acid disorders). It's the densest chapter in the book.
It's also the chapter Anking underweights relative to Step 1 yield. USMLE-Rx and NBME forms consistently test enzyme deficiency vignettes — 'child with hepatomegaly and hypoglycemia' → von Gierke's; 'cherry red spot on macula' → Tay-Sachs vs Niemann-Pick differentiation. These need dedicated, chapter-focused review, not passive reading.
Ellie turns the First Aid biochemistry chapter into an atomic deck in one paste. Every pathway becomes cloze deletions with substrates, enzymes, cofactors. Every enzyme deficiency becomes a clinical vignette card with buzzwords. Review over 2 weeks, then maintain during dedicated.
What to card from the biochem chapter
Not every fact deserves a card. The high-yield subset:
- Every named enzyme deficiency (VonGierke, Pompe, Cori, McArdle, Andersen — all glycogen storage diseases; Tay-Sachs, Niemann-Pick, Fabry, Krabbe, Gaucher, Metachromatic, Hurler, Hunter — lysosomal storage diseases)
- Rate-limiting enzymes of each pathway (glycolysis: PFK-1; gluconeogenesis: fructose-1,6-bisphosphatase; TCA: isocitrate dehydrogenase; ETC: cytochrome c oxidase; fatty acid synthesis: acetyl-CoA carboxylase; fatty acid oxidation: carnitine acyltransferase I; cholesterol: HMG-CoA reductase; urea cycle: carbamoyl phosphate synthetase I)
- Cofactor requirements (B1 for pyruvate dehydrogenase, α-ketoglutarate DH, transketolase, branched-chain ketoacid DH; B2 for FAD; B3 for NAD; B5 for CoA; B6 for transaminases; B7 for carboxylases; B9 for methylation; B12 for methylmalonyl-CoA mutase)
- Amino acid classification (essential/nonessential, acidic/basic, ketogenic/glucogenic)
- Urea cycle (order: CPS-I → ornithine transcarbamylase → argininosuccinate synthetase → argininosuccinate lyase → arginase)
- Purine and pyrimidine synthesis differences (de novo vs salvage; PRPP as branch point)
Enzyme deficiency drilling — the highest-yield pattern
Enzyme deficiency questions have a repeated structure: age of presentation, key symptom, buzzword lab finding, inheritance pattern. Card each disease with that 4-field format. Example front: 'Child with painful crises, telangiectasias, kidney failure, X-linked.' Back: 'Fabry disease — α-galactosidase A deficiency.'
How to review this chapter
Generate the deck the day you finish reading. Review 20 minutes daily for 10 days — that's when the enzyme names and pathway steps consolidate. Then let spaced repetition space them out. During dedicated, do a full sprint review over 2 days to knock rust off.
Related First Aid chapters that pair well
Biochemistry connects to pharmacology (metformin → gluconeogenesis inhibition), pathology (glycogen storage diseases → hepatomegaly), and genetics (autosomal recessive inheritance dominates enzyme deficiencies). Card in parallel with those chapters for maximum cross-reference stickiness.
Frequently asked questions
Is biochemistry high-yield on Step 1 after the pass/fail change?
Yes. Step 1 remains a comprehensive knowledge exam even at pass/fail — you still need to pass. Biochemistry vignettes (enzyme deficiencies especially) are guaranteed to appear. USMLE-Rx and NBME forms both weight biochemistry at roughly 8–10% of items.
Should I use Lippincott Biochemistry too?
If you struggled with biochem in M1 and want a deeper reference, yes. If First Aid biochem is understandable to you, don't add Lippincott — the marginal return is low relative to time cost. Boards and Beyond biochem videos are a better complement for concept-heavy learners.
How does this differ from the Anking biochem tag?
Anking biochem is comprehensive but organized by concept, not by First Aid chapter. If your school follows First Aid order (most do during dedicated), an Ellie-generated chapter deck matches your review timeline better. Many students use both.
What about the biostatistics section at the end of biochem?
First Aid puts biostats in a separate 'Public Health Sciences' chapter, not in biochemistry. See our upcoming First Aid biostats chapter deck.
How many cards does the biochem chapter generate?
Roughly 350–500 atomic cards. The pathway cloze deletions and enzyme deficiency vignettes are the bulk. Not all need to be reviewed to mastery — focus on the 100 highest-yield.
Can I share the deck with my study group?
Yes. Publish the deck and share the URL. Study partners get updates when you edit cards.
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