Answer: A: It becomes inactive.
Explanation: Pepsin works best at a pH of 2. And as the stomach has a very acidic condition, pepsin works well. But in the small intestine, the pH is about 8, which is too high for pepsin to function. Therefore, pepsin gets denatured in the small intestine.
Olfaction is not a tactile sensation, nor it's related to chewing food.
Olfactory receptors are chemical receptors in the nasal cavity that react with different odors creating the sense of smell that is interpreted in the brain.
So, olfaction is a chemical sensation that we experience while inhaling different odors through our noses.
<em><u>HOPE THIS HELPS </u></em>
" The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid. "
THE ANSWER IS PROTEINS :)
