If nucleolar DNA were isolated and studied, one would find
A) it could be hybridized to saturation with ribosomal 18S RNA, and then would not hybridize with ribosomal 28SRNA.
B) it could be hybridized to saturation with ribosomal 28S RNA, and then would not hybridize with ribosomal 18SRNA.
C) it could be hybridized to saturation independently with both 18S and 28S RNA.
D) as in C, but such hybridization would show competition by messenger RNA.

Question

Quizplus · Accepted Answer

The nucleolus is the site of ribosomal RNA (rRNA) synthesis and assembly into ribosomes. Both 18S and 28S rRNA are components of ribosomes, with 18S rRNA being a part of the small ribosomal subunit and 28S rRNA a part of the large subunit. Therefore, nucleolar DNA, which encodes for rRNA, can be hybridized to saturation independently with both 18S and 28S RNA, reflecting its role in producing these rRNA molecules.

If Nucleolar DNA Were Isolated and Studied, One Would Find