This is any substance used in treating or alleviating the symptoms of a disease or injury

This is any substance used in treating or alleviating the symptoms if a disease or injury Medicine

Explanation:

There are different types of medicine that do different things to treat many kinds of symptoms or injuries.

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regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

i tried the eyeshadow trick you told me about and it worked so good i i did a yellow going into orange colors and it was bright and you could see it on my eyes