Choose the correct statements about proteins and evolution. a. Percent identity for a random alignment of two nucleic acids is likely to be higher than the percent identity for an equal-length random alignment of two polypeptide segments. b. Paralogs are derived from a common ancestor but often have different functions. c. Two proteins that have similar tertiary structures are said to be homologous. d. The tertiary structure of a protein is less conserved than the primary structure. e. Lupine leghemoglobin and human a-hemoglobin are only about 16% identical. This is an example of convergent evolution.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Choose the correct statements about proteins
and evolution.
a. Percent identity for a random alignment of
two nucleic acids is likely to be higher than the
percent identity for an equal-length random
alignment of two polypeptide segments.
b. Paralogs are derived from a common
ancestor but often have different functions.
c. Two proteins that have similar tertiary
structures are said to be homologous.
d. The tertiary structure of a protein is less
conserved than the primary structure.
e. Lupine leghemoglobin and human
a-hemoglobin are only about 16% identical.
This is an example of convergent evolution.
Transcribed Image Text:Choose the correct statements about proteins and evolution. a. Percent identity for a random alignment of two nucleic acids is likely to be higher than the percent identity for an equal-length random alignment of two polypeptide segments. b. Paralogs are derived from a common ancestor but often have different functions. c. Two proteins that have similar tertiary structures are said to be homologous. d. The tertiary structure of a protein is less conserved than the primary structure. e. Lupine leghemoglobin and human a-hemoglobin are only about 16% identical. This is an example of convergent evolution.
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