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.

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.