The predominant cells in blood are the red blood cells (RBC) which contains a protein called hemoglobin. Hemoglobin is the principal determinant of the color of blood. Arterial blood and capillary blood are bright red, as oxygen imparts a strong red color to the heme group.
RNA is assembled as a chain of nucleotides, that is usually  single-stranded. In eukaryotic cells, it can be found in the  nucleus and cytoplasm. Edit. Share to: Lsilvstew. 2,538 Contributions. Answered Most Recently. In Genetics.
In eukaryotes DNA is located in the nucleus. mRNA is transported out of the nucleus when it is used for protein synthesis through translation. In the RNA world RNA worked as the platform for making catalysts, i.e. ribozymes instead of enzymes, that are produced from amino acids, i.e. they are proteins.