Final answer:
DNA with higher (G+C) content will have a higher buoyant density and is more difficult to denature compared to DNA with lower (G+C) content.
Step-by-step explanation:
DNA with higher (G+C) content will have a higher buoyant density. Buoyant density refers to the density at which DNA remains stationary in a density gradient centrifugation experiment. The higher the (G+C) content, the higher the buoyant density of the DNA. This means that DNA with higher (G+C) content is more difficult to denature compared to DNA with lower (G+C) content.