Produce proteins by following coded instructions that come from the nucleus of the cell. a) actins b) flagella c) microtubules d) ribosomes

the cell cycle is the final answer! : )

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products