The answer. Histones. DNA is wrapped around these proteins to form a complex called chromatin and allows the DNA to be packaged up and condensed into a smaller and smaller space. In almost all eukaryotes, histone-based chromatin is the standard, yet in bacteria, there are no histones.

In bacterial, bacteriophage, archaeal, eukaryotic, and organelle genomes, RNAs of very different function (tRNAs, rRNAs, and mRNAs) often contain introns. For example, pre-tRNA introns in bacteria and in higher eukaryote plastids are self-splicing group I introns.

Explanation: The correct answer is that prokaryotes only have exons, whereas eukaryotes have exons and introns. As a result, in eukaryotes, when mRNA is transcribed from DNA, the introns have to be cut out of the newly synthesized mRNA strand. The exons, or coding sequences, are then joined together.

In prokaryotic cells, no organized nucleus is found. Due to the absence of histone proteins, chromosomes are also not found. Instead, a fibrillar area called nucleoid is found attached to the inner side of the membrane. Nuclear membrane and nucleolus are absent in nucleoid.

Whereas eukaryotes wrap their DNA around proteins called histones to help package the DNA into smaller spaces, most prokaryotes do not have histones (with the exception of those species in the domain Archaea).

In eukaryotic cells, chromatin consists of all the DNA within the nucleus and its associated proteins, called histones….Eukaryotic chromosome.

The prokaryotic cells have no nucleus, no organelles and a very small amount of DNA. On the other hand, the eukaryotic cells have nucleus and cell organelles, and the amount of DNA present is large.

DNA structure and function. DNA is the information molecule. It stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes.

Uracil is the nitrogenous base present only in RNA, but not in DNA. DNA have thymine, guanine, adenine and cytosine. Thymine is replaced by uracil in RNA.

One of the purine bases of the nucleic acids (DNA and RNA). Adenine-Besides DNA and RNA, Adenine is also an important part of adenosine triphosphate. This molecule is important because it has the ability to phosphorylize, or add a phosphate group to, other molecules which allows energy to be released.

There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). A DNA molecule is composed of two strands.