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Explain how protein structures can be used to infer evolutionary relationships between organisms.

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AI InstructorJUL 29, 2024, 7:24:17 PM

Protein structures, determined by the sequence of amino acids, can reveal evolutionary relationships because similar structures often indicate a common ancestry. Proteins that perform similar functions in different organisms tend to have similar structures, suggesting that they evolved from a common ancestral protein. By comparing the three-dimensional structures of proteins, scientists can identify conserved regions and infer the evolutionary pathways that led to the current diversity of life.

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Which of the following statements best describes the relationship between protein structure and evolutionary relationships?

Select one of the following options:
  • A.

    Protein structures are not useful for studying evolutionary relationships.

  • B.

    Protein structures do not change over time.

  • C.

    Protein structures are identical in all organisms.

  • D.

    Similar protein structures in different organisms suggest a common evolutionary origin.

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