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UCSB CHEM 6AL FINAL 2026 LAB SCRIPT SOLVED QUESTIONS VERIFIED ANSWERS A+

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UCSB CHEM 6AL FINAL 2026 LAB SCRIPT SOLVED QUESTIONS VERIFIED ANSWERS A+

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UCSB CHEM 6AL FINAL 2026 LAB
SCRIPT SOLVED QUESTIONS
VERIFIED ANSWERS A+
◉ polar neutral amino acid classification.
Answer: contains O/N but no charge (ex: serine, threonine)


◉ acidic amino acid classification.
Answer: - charge as physiological pH, extra COO- (ex: aspartate,
glutamate)


◉ basic amino acid classification.
Answer: + charge at physiological pH, extra NH3+ (ex: lysine, arginine)


◉ tips for amino acid classification.
Answer: COOH --> acidic
NH2 --> basic


◉ whats the rule for protonation (pKa vs pH).
Answer: pH < pKa --> protonated
pH > pKa --> deprotonated


◉ what are examples of protonation.
Answer: COOH --> COO-

, NH3+ --> NH2
at physiological pH (7.4):
- amino = NH3+
- carboxyl = COO-


◉ protein structure (primary).
Answer: description: amino acid sequence
stabilized by: peptide bonds


◉ protein structure (secondary).
Answer: description: a-helix, B-sheet
stabilized by: H-bonds


◉ protein structure (tertiary).
Answer: description: 3D folding
stabilized by: R-group interactions


◉ protein structure (quaternary).
Answer: description: multiple subunits
stabilized by: same as tertiary


◉ forces of protein structure.
Answer: - hydrogen bonds

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