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Discussion

Molecular chaperones in the endoplasmic reticulum assist proteins by

  • A.carrying them bodily across the lumen membrane
  • B.helping them fold and preventing aggregation
  • C.cutting them into shorter and more useful fragments
  • D.adding phosphate groups in order to activate them

Answer: B

They bind exposed hydrophobic patches that would otherwise stick to one another, giving the chain time to find its correct shape. They supply no information about the final structure, which is written in the sequence itself.

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