A) Describe the DNA structure (components, their names, base pairings) b) Describe Watson and Crick's’ model and structure. How does it explain the DNA model?
c) Explain the Base-Pairing rules. What are they? How does it work?

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a physical change is being made.

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