Which of the following molecules is the subunit of dna that links together to form strands of dna? a. a codon b. a polymerase c. a phosphate base d. a nucleotide

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

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