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Answer 1 · 2017-12-02T07:02:30

See below:

Alpha helix and beta plates both are two different secondary structures of protein.

Alpha helix is kept by formation of hydrogen bonds between amino acids in successive turns of spiral.
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http://faculty.ccbcmd.edu/~gkaiser/biotutorials/proteins/fg4b.html

#beta#-pleated sheet is a stable rigid structure formed by folding back of polypeptide. It represents maximum hydrogen bonding.