Sentences with phrase «eukaryote organisms»
In eukaryote organisms (almost all large organisms, such as animals, plants, and fungi, but not bacteria), DNA forms a complex with proteins that are called histones.
http://www.allthingsstemcell.com/ Not exact matches
Despite that archaeal cells were simple and small like bacteria, researchers found that Archaea were more closely related to organisms with complex cell types, a group collectively known as «eukaryotes».
The advent of the nucleus — which differentiates eukaryotes (organisms whose cells contain a true nucleus), including humans, from prokaryotes, such as bacteria — can not be satisfactorily explained solely by the gradual adaptation of prokaryotic cells until they became eukaryotic.
The resemblance between archaea and eukaryote DNA wrapping means that the first organism that used this storage scheme was an ancestor of both modern eukaryotes and archaea, the researchers conclude.
So far researchers have sequenced the genomes of three other organisms: two kinds of bacteria and a yeast, which is a eukaryote.
These single - celled organisms, unlike eukaryotes, lack nuclei and other organelles.
This is the first eukaryote — organisms, like plants and animals, whose cells contain distinct nuclei — found without the machinery of mitochondria.
They live inside their host's cells and have highly specialized features: They are only able to reproduce inside the host's cells, they have the smallest known genome of all organisms with a cell nucleus (eukaryotes) and they posses no mitochondria of their own (the cell's power plant).
They found that the proteins of prokaryotes (the group of organisms that includes bacteria and blue - green algae) tended to have sequences of about 150 amino acids, or a multiple of that number, while the proteins of the eukaryotes (which account for all other organisms) had amino acid sequences in multiples of around 125.
Meiosis is essential for sexual reproduction and therefore occurs in all eukaryotes (including single - celled organisms) that reproduce sexually.
(Eukaryotes are all organisms with cells that contain a nucleus, from microbes to plants to vertebrates.
In particular, one of the enzymes needed for the synthesis of important glycoconjugates had not yet been identified: the apicomplexan organisms do not have the GNA1 enzyme that fulfils this function in animals, plants and other eukaryotes.
Most biologists typically recognize three official branches of life: the eukaryotes, which are organisms whose cells have a nucleus; bacteria, the single - celled organisms that may or may not possess a nucleus; and archaea, an ancient line of microbes without nuclei that may make up as much as a third of all life on Earth (See «Will the Methane Bubble Burst?»
What Claverie calls «the final click» came after comparative analysis of Mimi's DNA with that of other organisms in life's three domains: the eukaryotes, bacteria, and archaea.
Though little is known about Loki, scientists hope that it will help to resolve one of biology's biggest mysteries: how life transformed from simple single - celled organisms to the menagerie of complex life known as eukaryotes — a category that includes everything from yeast to azaleas to elephants.
Moreover, certain signature Mimi genes, such as those that code for the production of the soccer - ball shape of its capsid (an outer protein coat common to all viruses), have been conserved in viruses that infect organisms from all three of the domains, particularly in eukaryotes.
That's true of nearly all eukaryotes, and the more complicated the organisms, the more of those sequences you have.
They infect a wide variety of organisms: both eukaryotes (animals, fungi and plants) and prokaryotes (bacteria).
Or consider the nuclear genes of the cells of advanced organisms (eukaryotes): At some early point in their evolution, these cells gained the help of the genes of a parasite or symbiont that became the mitochondrion, an organelle necessary for energy production.
Nor, researchers thought, can any other eukaryotes — the group of organisms we belong to along with other animals, plants, fungi, and various microscopic creatures.
The eukaryote tree abounds with single - celled organisms practicing the basics that combine to make multicellular reproduction possible.
The reason for the disparity may be that the standard computer annotation method was largely developed for the genomes of simple (prokaryotic) organisms, not for the more complex sequences found in the genomes of humans and other eukaryotes.
The third group of organisms comprises all visible life, such as humans, animals, and fungi — collectively known as eukaryotes.
[4] Eukaryotes are uni - or multicellular organisms with cell nuclei and organelles, unlike bacteria and archaea.
After comparing the sequence to those of a variety of other organisms, the researchers concluded that the Mimivirus lineage dates back some 3.3 billion years to the separation of early life into three major divisions: archaea, bacteria, and the more complex eukaryotes.
Although none of these organisms has yet been isolated, observed under the microscope nor cultured, these genome sequences provide us with an unprecedented opportunity to explore the origins of these cytoskeletal elements and promise to shed light on the evolutionary transition that led to the emergence of eukaryotes.
Despite that archaeal cells were simple and small like bacteria, Woese found that Archaea were more closely related to organisms with complex cell types, a group collectively known as «eukaryotes».
These organisms are called Eukaryotes and are either singular - or multiple - celled.
All species of large complex organisms are eukaryotes, including animals, plants and fungi, although most species of eukaryote are protist microorganisms.
«This research highlights how interconnected the behavior is between prokaryotes and eukaryotes, between mammalian organisms and the microbes that live inside them,» says lead co-author Eran Elinav, an immunologist at the Weizmann Institute of Science in Israel, in a press release.
Asgard is a group of microbes, described for the first time in the journal Nature this week, that may well include the organism that gave rise to all complex life — from the tiniest eukaryotes to the tallest redwoods, the dinosaurs and us.
Objective: To understand the first steps in the evolution of photosynthetic eukaryotes and the impact plastidial endosymbioses (involving cyanobacteria or unicellular algae) had on the genomes of these organisms that are critical to the functioning of ecosystems.