Studies of the Structure of Proteins Such as Cytochrome C

question 128

Multiple Choice

Studies of the structure of proteins such as cytochrome c and lysozyme in different species have shown that

• A) the rate of evolution of particular proteins is often relatively constant over time.
• B) many nucleotide substitutions result either in no change in the amino acid sequence of the protein or in a change to a functionally equivalent amino acid.
• C) there are fewer differences in the amino acid sequences of proteins whose organismal sources were closely related than in those whose sources were distantly related.
• D) functionally important regions of a protein can be discovered by identifying the regions with the most amino acid substitutions.
• E) All of the above

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