Answer:
a) allosteric site
Explanation:
An allosteric site is a site on an enzyme other than the active site where a molecule that is not a substrate binds. This changes the shape of the enzyme, making it harder for the substrate to bind and inhibits enzyme activity.
Hope that helps.
Cell wall is the outer permeable covering in all pants and almost all prokaryotes ! cell wall are mainly made up of cellulose , sometime by chitin!!
I believe the answer is the location of energy sources
There are actually two planets referred to as gas giants which are Jupiter and Saturn. These two planets are made of mostly helium and hydrogen which makes them gas giants, while Uranus and Neptune have more ice and rock substances, so they are not considered gas giants.