All eukaryotic genomes carry introns as parts of some gene structures and the introns are to be eliminated by a complex molecular machinery called the spliceosome comprising five snRNAs and more than 150 proteins . Where are introns found in eukaryotes? For example, introns are extremely common within the nuclearRead More →
Numerous small ribosomes in cytoplasm. many membrane bound organelles- lysosomes, mitochondria (with small ribosomes), golgi bodies, endoplasmic reticulum, nucleus. … Bacteria, of course, have no nucleus and therefore also nuclear membrane. Are lysosomes only in eukaryotic cells? lysosome, subcellular organelle that is found in nearly all types of eukaryotic cellsRead More →
Structure. Prokaryotes have a prokaryotic cytoskeleton that is more primitive than that of the eukaryotes. … Membranous organelles (or intracellular membranes) are known in some groups of prokaryotes, such as vacuoles or membrane systems devoted to special metabolic properties, such as photosynthesis or chemolithotrophy. Do eukaryotes have internal partition membranes?Read More →
Many people think that eukaryotes are all multicellular, but this is not the case. While prokaryotes are always unicellular organisms, eukaryotes can be either unicellular or multicellular. For example, most protists are single-celled eukaryotes! Why are eukaryotes multicellular? Eukaryotic cells are more complex than prokaryotes, and the DNA is linearRead More →
Prokaryotes are small, but their large numbers and metabolic abilities enable them to play key roles in ecosystems by decomposing wastes, recoiling chemicals, and affecting the concentrations of nutrients available to other organisms. In what ways are the Archaea uniquely different from bacteria? Similar to bacteria, archaea do not haveRead More →
Most of these protein modifications are attached after synthesis of the polypeptide chain (translation), and hence they are commonly termed ‘post- translational modifications’ (PTMs). … In bacteria, most glycosylation events occur after protein folding3,4. Are there post translational modifications in E coli? E. coli system is used to express prokaryoticRead More →
In prokaryotic cells, the bacterial polysomes are in the form of double row structures and the ribosome is contacting each other within smaller subunits. In eukaryotic cells, the densely packed 3D helices and double row polysomes which are planar are found, which are similar to that of prokaryotic polysomes. DoRead More →
Post-transcriptional modification or co-transcriptional modification is a set of biological processes common to most eukaryotic cells by which an RNA primary transcript is chemically altered following transcription from a gene to produce a mature, functional RNA molecule that can then leave the nucleus and perform any … What are threeRead More →
Post-transcriptional modification or co-transcriptional modification is a set of biological processes common to most eukaryotic cells by which an RNA primary transcript is chemically altered following transcription from a gene to produce a mature, functional RNA molecule that can then leave the nucleus and perform any … What are threeRead More →