Approximately one-third of a polypeptide chain consists of reverse turns because:
A. turns increase stability.
B. turns are the site of substrate binding.
C. turns allow a polypeptide to assume a globular configuration.
D. ? helices are stabilized by turns.
E. ? sheets are stabilized by turns.
C
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A) communities / habitats B) communities / ecosystems C) populations / habitats D) populations / ecosystems
__________ stop fluid from leaking across an
epithelium. Fill in the blank(s) with the appropriate word(s).
Within a community, most species have a similar range of environmental tolerances
Indicate whether the statement is true or false
Sustainable agriculture depends on planting large tracts of high-profit crops
Indicate whether the statement is true or false