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MCAT Chemical and Physical Foundations of Biological Systems Flashcards: 5d Amino Acids Peptides Protein Structure

Study 5d Amino Acids Peptides Protein Structure in MCAT Chemical and Physical Foundations of Biological Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

Which amino acids have side chains that are positively charged (basic) near pH 77?

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ANSWER

Lys, Arg, His. Basic side chains have high pKa values, remaining protonated and positively charged near neutral pH.

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MCAT Chemical and Physical Foundations of Biological Systems: Foundational Concepts

You are hereAmino Acids, Peptides, and Protein Structure (5D)25 cards

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This deck focuses on 5d Amino Acids Peptides Protein Structure, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Chemical and Physical Foundations of Biological Systems.

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Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
A 55-residue intracellular protein binds a small anionic metabolite. The binding site includes a Lys side chain that forms a key electrostatic interaction with the ligands carboxylate. At pH 10.5 the protein retains its folded structure by CD but shows markedly reduced binding. Which environmental interpretation best explains the reduced binding at high pH?
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