Which group of organelles is directly responsible for the production of new molecules within a cell?
a. ribosomes, the endoplasmic reticulum, and golgi apparatusesb. gogli apparatuses, lysosomes, and the plasma membranec. the endoplasmic reticulum, plastids, and vacuolesd. the nucleolus, vacuoles, and ribosomes.

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?