Which substance does not contain hormones , Biology

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Hormones are composed from several classes of molecules. As far as our present knowledge extends, hormones are not found in which of the subsequent categories of substances:

a) Proteins

b) Peptides

c) Nucleic acids

d) Steroids

Answer: c -- nucleic acids

 


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Which of the below are skin receptors in humans which are sensitive to heat? Are they:

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