Why do cells synthesize proteins when we can obtain them through food?

by Tanvi Jose
(Pallikoodam, India)

I've been learning protein synthesis, through transcription and translation in school. In translation it is said amino acids are carried by t-RNA into the ribosome and on the t-RNA in the P site all the amino acids are loaded.
So my doubt is, why does the cell need to synthesize proteins when we can absorb it from the food we take in? And also, why do we break down the proteins we take in into amino acids and then synthesize proteins from the broken down amino acids. Can't we keep them in protein form initially itself?

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