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HESI A2 Retake Study Guide Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
A molecule that speeds up chemical reactions without being consumed is called a(n) ✔✔enzyme.
A protein’s secondary structure is stabilized by ✔✔hydrogen bonds.
Which functional group contains a nitrogen atom bonded to hydrogen?✔✔amino group (-NH2).
Which process converts pyruvate to lactate in muscle cells?✔✔lactic acid fermentation.
The double-helix structure of DNA was discovered by ✔✔Watson and Crick.
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Which type of biomolecule provides insulation and cushioning for organs?✔✔lipids.
Enzymes are specific to their substrate due to the shape of the ✔✔active site.
Which sugar is found in DNA?✔✔deoxyribose.
The bond between two monosaccharides is called a ✔✔glycosidic bond.
Which organelle is the site of lipid synthesis?✔✔smooth endoplasmic reticulum.
Which cofactor is often required for enzyme activity?✔✔metal ions.
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The process of copying DNA to make RNA is called ✔✔transcription.
Which amino acid sequence forms alpha-helices and beta-sheets?✔✔secondary protein structure.
Which molecule functions as a long-term energy reserve in animals?✔✔triglycerides.
A buffer in the blood helps to maintain ✔✔pH balance.
The molecule that carries amino acids to the ribosome is ✔✔tRNA.
Which reaction produces water as a byproduct?✔✔dehydration synthesis.
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