7h • General discussion
🧠 UNIT 1 BRAIN TEASER: Same Ingredients, Different Result
Scientists produce two polypeptides, X and Y. Both are the same length and contain exactly the same number and types of amino acids. However, the amino acids occur in a different sequence.
Under identical conditions:
- Polypeptide X shows 100% relative binding to a target molecule.
- Polypeptide Y shows only 8% relative binding.
Which statement best explains the difference?
💬 Choose your answer and add one sentence of biological reasoning. A letter by itself does not count!
A. Polypeptide X contains more peptide bonds than polypeptide Y.
B. The different sequences position the R groups differently, altering interactions, folding, and the shape of the binding site.
C. Polypeptide Y contains fewer hydrophobic amino acids than polypeptide X.
D. Proteins with the same amino acid composition must have the same structure, so the results are invalid.
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🧠 UNIT 1 BRAIN TEASER: Same Ingredients, Different Result
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