How many chromosomes does the ending cell (either egg or sperm cell have? explain.

in an Human egg or sperm, there are 23 chromosomes, one which is an x or y. Human egg is Haploid(has 23 chromosomes) and a sperm is Haploid(has 23 chromosomes).

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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