by referring to the observation that DNA is found exclusively in the nucleus while proteins are found throughout the cell, the scientist supporting the DNA hypothesis implies that genes are made only of DNA because which of the following are also found only in the nucleus?

The observation that DNA is found exclusively in the nucleus, while proteins are found throughout the cell, implies that genes are made only of DNA because **ribosomes** are found throughout the cell but are primarily associated with synthesizing proteins from messenger RNA (mRNA) that is transcribed from DNA in the nucleus. This relationship suggests that the genetic information (i.e., genes) resides in the nucleus where DNA is localized, and this information is transcribed into mRNA before being translated into proteins at the ribosomes in the cytoplasm. Thus, the localization of DNA in the nucleus supports the idea that genetic materials, or genes, are made of DNA.