How are genes used by cells to build proteins?

The correct answer will be-gene regulation.

Explanation:

Genes are the segment of DNA which codes for the proteins through gene regulation.

In response to stimuli, the genes get transcript into a molecule called mRNA through the process of transcription in the nucleus. The mRNA export out of the nucleus and gets translated into protein thorough translation process.

During translation, the ribosome reads the nitrogenous base sequence on the mRNA by reading three nitrogenous bases at a time. These are known as the triplets or codons which code for a specific amino acid. The synthesized amino acids bond via a peptide bond and form the polypeptide.

the answer would be   10%