To determine whether a cell is a eukaryotic or prokaryotic cell, one can observe certain features. If the cell in the question possesses a well-defined or definite nucleus and have membrane-bound organelles such as mitochondria, chloroplasts, Golgi apparatus, endoplasmic reticulum, the cell is eukaryotic. If the cell has nucleoid or indefinite nucleus and without membrane-bound cell organelles, the cell is prokaryotic. If ribosomes in a cell are the 80S (S=Svedberg units) type, the cell is eukaryotic and if ribosomes are 70S type then it is prokaryotic.
RNA is a single-stranded nucleic acid. RNA has a ribose sugar instead of a deoxyribose sugar like DNA. RNA nucleotides have a uracil base instead of thymine. There are many different types of DNA RNA is single stranded RNA forms a double helix.
