(Answered) A peptide built from three amino acids must havethree side

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A peptide built from three amino acids must have

three side chains
three carboxylate groups
three amino groups
three peptide bonds

A protein built from 12 identical polypeptide chains

is encoded by a single gene
can mutate 12 times faster than a protein with one chain
can carry out 12 discrete functions
must be an extracellular protein

In order for two polynucleotide strands to anneal

the strands must be complementary
paired bases must separate
the temperature must be high
new phosphodiester bonds must form

Could you explain which are correct and why?

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