Question

10 multiple choice 1 point why did the dna appear as long, stringy, and viscous material? onion dna is different from animal dna dna molecules are very long and coil together when precipitated ethanol made the dna shrink it was contaminated with proteins clear my selection

Explanation:

DNA molecules are inherently long - chained polymers. When precipitated out of a solution, they coil together, giving the appearance of long, stringy, and viscous material. The other options do not directly explain this physical appearance. The difference between onion and animal DNA is not relevant to the physical appearance in this context. Ethanol is used for precipitation, not shrinking. Contamination with proteins is not the main reason for the long, stringy, viscous look.

Answer:

DNA molecules are very long and coil together when precipitated