Which of the following could be produced after a supernova explodes and the leftover material is still very dense? 1. White Dwarf
2. Black Hole
3. Supernova
4. Red giant​

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