"Esophagus" is the digestive organ that <span>has peristaltic contractions that empty food into the stomach. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that you were looking for and it has come to your help.</span>
Answer:
DNA binding domain and allosteric domain
Explanation:
Repressors are proteins that inhibit gene expression, They usually have DNA or RNA binding site which enables them to binde to the operator or associated silencers. Allosteric domain is the site for the binding of other molecules, such as corepressors and inducers that regulate repressor's activity.
an allele is a form ofa gene
The Cranium protects the brain and is a bit like a skull.
The Medulla helps respiratory and the circulatory systems with breathing and in the brain the neurons form forebrain to midbrain travel through the Medulla.
Pulmonary valve - connects right ventricle and pulmonary trunk (which divides into right and left pulmonary arteries). It is a semilunar valve
