Azebra cell is just about to replicate its dna. which of the following will happen first?
a. all of the cells dna attach to protein
b. dna folds over on itself to create a dense chromosome
c. the dna unravels to make two strands
d. rna attaches to dna

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.