Which statement is true? (A) diploid cells contain two sets of chromosomes l.
(B) haploid cells contain chromosomes from each parent.
(C) haploid cells are attached to diploid cells with spindle fibers.
(D) diploid cells contain half the original of chromosomes.

A) diploid cells contain two sets of chromosomes

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

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