Flattened ,lateral structure attached to a stem and is an organ for photosynthesis

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.

well, i believe that the answer is 2. : 3

it marks things for degradation via the proteasome. it alters there celluar location.