Examlex
What structural level is represented by the coiling of the protein chain backbone into an alpha helix?
Apostrophe
A punctuation mark used to indicate possession or the omission of letters or numbers.
Measurement
The process of determining the size, quantity, or degree of something using established units or methods.
Standards
Established norms or criteria that define the quality, quantity, or value of something.
Punctuation
The use of symbols such as commas, periods, and question marks in writing to clarify meaning and indicate pauses or intonation.
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