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What Is Initially Transparent, Disappears If Not Used, but Is

question 70

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What is initially transparent, disappears if not used, but is bright in appearance when the mouse is moved over it?


Definitions:

Hydrogen

The lightest and most abundant chemical element in the universe, with symbol H and atomic number 1, commonly found in water and organic compounds.

Carbon

A chemical element with symbol C, capable of forming many compounds, essential for life, and a major component of biomolecules.

Polypeptide Chain

A linear organic polymer consisting of a large number of amino acid residues bonded together in a chain, forming part of or the whole of a protein molecule.

Amino Acids

Amino acids are organic compounds that combine to form proteins, serving as the building blocks of life, containing an amino group (-NH2) and a carboxyl group (-COOH).

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