Through a series of experiments the duo conducted in 1952, Alfred Hershey and Martha Chase discovered that genetic material is found in DNA. Prior to their discovery, most scientists believed that genetic material was found in proteins due to their diversity and prevalence in cells.
Answer:
X is negative heterotropic modulator
Explanation:
In allosteric regulations, modulators are molecules that causes a change in the conformation of an enzyme, hence, resulting a change in enzyme activity. It can lead to a decrease or an increase of the enzyme. When a molecule decreases the enzyme activity it called a negative modulator, when it increases or activates the enzyme activity, it is called a positive modulator.
A positive or negative modulator can either be homotrophic (substrate acts as modulator) or heterotropic (another ligand acts as modulator).
In the example above, X is negative heterotropic modulator, because the modulator is different from the substrate and it also decreases the enzyme activity.
I'm pretty sure it's <span>chloroplasts</span>
