Potassium dichromate increases availability of which group for binding dyes?

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Multiple Choice

Potassium dichromate increases availability of which group for binding dyes?

Explanation:
Potassium dichromate, as a strong oxidizing mordant, can denature and modify tissue components enough to expose amino groups on proteins. These -NH2 groups then become more available to interact with dyes, enhancing binding where amine sites participate in dye–tissue interactions. The other groups are either less involved in this dye-binding context or are further oxidized/crosslinked by dichromate (for example, thiols are oxidized to disulfides), making them less available. So the group whose availability is increased for dye binding is the amino group.

Potassium dichromate, as a strong oxidizing mordant, can denature and modify tissue components enough to expose amino groups on proteins. These -NH2 groups then become more available to interact with dyes, enhancing binding where amine sites participate in dye–tissue interactions. The other groups are either less involved in this dye-binding context or are further oxidized/crosslinked by dichromate (for example, thiols are oxidized to disulfides), making them less available. So the group whose availability is increased for dye binding is the amino group.

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