Can bacteria have an RNA genome? What organelles are found in prokaryotes? Does a RNA virus infiltrate the nucleus of the cell? Do lysogenic phages contain an RNA genome? Are there introns in prokaryotic genes? Where does ribosomal RNA accumulate?
Why do Eukaryotes have so much more non-coding DNA than Prokaryotes? In eukaryotic cells, how are genes that are needed together made active at the same time? Like eukaryotes, bacteria and archaea enclose their DNA in a nucleus. True or false? Explain. How many types of RNA and DNA are...
Some scientists estimate that 'life' began on our planet as early as four billion years ago. And the first living things were simple, single-celled, micro-organisms calledprokaryotes(they lacked a cell membrane and a cell nucleus). What came after dinosaurs? After the dinosaurs' extinction,flow...
In prokaryotes, transfer of DNA from a donor cell to a recipient cell is mediated by direct cell–cell contact. CONSPECIFICS Members of the same species. FITNESS A measure of the capacity of an organism to survive and reproduce. HOLLIDAY JUNCTIONS Cross-shaped junctions at which four strands of...
Although there is no accepted division of the kingdom Monera, that is, prokaryotes, into protoanimal or protoplant, E. coli bacteria have been analyzed according to direct perception (Pittenger and Dent 1988), and as exhibiting “quorum sensing” in forming colonies depending on the ...
Meanwhile, in similar number of aerobic lineages (59, 56, and 46), the genes encoding these three enzymes have been detected. This result implicates the occasional occurrence of guanine oxidation in anaerobic prokaryotes. Apparently, obligate anaerobic prokaryotes and anaerobic prokaryotes suffered less...
To answer the question why eukaryotic cells release vesicles, we may learn from prokaryotes. Bacteria release outer membrane vesicles, resembling microparticles, which act as “multi-purpose carriers”. They contain signalling molecules for other bacteria, deliver toxins to host cells and exchange DNA ...
As the evolutionary story is usually told,first came the prokaryotes: the archaea and bacteria, which are often envisioned as simple bags of enzymes without an intricate structure. Which is true of Archaea? Which is true of archaea?They contain many documented human pathogens. They have unique ...
These compounds are best known as plant metabolites, but recent studies have revealed that terpenes are produced throughout the tree of life, including prokaryotes [35–38], fungi [39], and social amoebae [40]. Although terpenes of bacterial origin have been known for over a century, their ...
There are several types of CRISPR-Cas systems among prokaryotes but only elements of CRISPR type II are employed in genome engineering. CRISPR-Cas type II utilizes small RNA molecules (crRNA and tracrRNA) to precisely direct the effector nuclease - Cas9 - to a specific...