Which Of The Following Statements About Cyanobacteria Is True

Bacterial and archaeal flagella also differ in their chemical structure. So there is a fundamental kinetic and organizational difference between eukaryotes and bacteria in the way that genetic information is expressed in the form of protein and is therefore allowed to be converted into cellular structure, function and organization. Both bacteria and archaea have cell membranes and they both contain a hydrophobic portion. What type of prokaryotes, in terms of their metabolic needs (autotrophs, phototrophs, chemotrophs, etc. Other aspects of motor function, such as the binding to the filament, are quite different among different motors, and if you look even just within the families - the myosin family, the kinesin family - the way they couple that nucleotide switch to motion is actually very wildly, dramatically different among different individuals [94]. Two students debate as to whether or not this offspring is the same species as its parents, since its feather color differs from that of one of its parents. The ribosomes in prokaryotic cells also have smaller subunits. This structure maintains the cell's shape, protects the cell interior, and prevents the cell from bursting when it takes up water. This suggests that these bacteria __________. 1.The correct statement about cyanobacteria ( blue green algae) a. Absence of motile organs b. Cell wall is - Brainly.in. Some of the antibiotics used to treat bacterial infections in humans and other animals act by targeting the bacterial cell wall. In support of this idea, stromatolites became more abundant in the fossil record after the major extinction events that wiped out most of the animals, and then receded again when the animals bounced back [12]. It is true that over the past 15 or 20 years we have identified a surprisingly large number of molecular similarities between bacterial cells and eukaryotic cells.

Which of the following statements about cyanobacteria is true weegy
Which of the following statements about cyanobacteria is true life
Which of the following statements about cyanobacteria is true apex
Which of the following statements about cyanobacteria is true religion
Which of the following statements about cyanobacteria is true religion outlet

Which Of The Following Statements About Cyanobacteria Is True Weegy

OK, finally I'm going to bring this whole argument back full circle and say that really the crucial difference between them and us is the membrane-enclosed nucleus. The true cause of these diseases was not understood at the time, and some people thought that diseases were a spiritual punishment. But leaving that example aside, the main consequence biologically of having a membrane-enclosed nucleus is that transcription and translation are uncoupled. Dogterom M, Yurke B: Measurement of the force-velocity relation for growing microtubules. Prokaryotes that obtain their energy from chemical compounds are called _____. 2001, 276: 11743-11753. What are prokaryotic and eukaryotic cells? The order of taxonomic groupings, from most general to most specific is: kingdom, phylum, class, order, family, genus, species. Which of the following statements about cyanobacteria is true weegy. There is an enzyme called telomerase. And in a few bacteria, there is even some evidence that they have homologs (or at least functional analogs) of intermediate filament proteins [34]. 1975, New York: Academic Press. Linear stepper motors, like kinesin, myosin and dynein, would be another [88].

Kraemer JA, Erb ML, Waddling CA, Montabana EA, Zehr EA, Wang H, Nguyen K, Pham DSL, Agard DA, Pogliano J: A phage tubulin assembles dynamic filaments by an atypical mechanism to center viral DNA within the host cell. E. coli colonizes the surface of the leaf, forming a biofilm that is more difficult to remove than free (planktonic) cells. At roughly the same time (and for eons thereafter), oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the seawater. The ability of an organism to contribute its genes to future generations. They tend to be oriented in a very reproducible way as you go from one individual to the next [105, 106] and because of the coupled transcription and translation, the physical site where you have a bit of DNA is also connected to the physical site where you make the RNA and the physical site where you make the protein from that bit of information [107]. Bryant DM, Mostov KE: From cells to organs: building polarized tissue. E. They often form bloom in non - polluted fresh water bodies. It requires transport of DNA by a virus. That may be obvious when we're comparing humans to bacteria. I hope the explanation is clear to you. Let us stipulate that it is observable that all cells are organized in some way.

Which Of The Following Statements About Cyanobacteria Is True Life

Stricker J, Maddox P, Salmon ED, Erickson HP: Rapid assembly dynamics of the Escherichia coli FtsZ-ring demonstrated by fluorescence recovery after photobleaching. Or there can be pre-stressed springs that are built in such a way that they store mechanical energy that can be released all at once, as, for example, in the acrosomal reaction in the horseshoe crab sperm [89]. 1996, 93: 6726-6730. They seem to be immortal and divide without any limits. Single-celled biflagellates with two specialized flagella are golden algae. Well, let's now think a little bit about what other cellular features go along with a membrane-enclosed nucleus. E. Early bacterial species needed to be able to move and thus developed complex flagella to facilitate this motility. Which of the following statements about cyanobacteria is true religion outlet. Capra EJ, Laub MT: Evolution of two-component signal transduction systems. Thin filaments called fimbriae (singular: fimbria), like those shown in the picture below, are used for adhesion—that is, they help cells stick to objects and surfaces in their environment. Because bacteria have circular DNA, they don't have those problems.

The cell wall is ________. Although prokaryotic and eukaryotic cells have many differences, they share some common features, including the following: - DNA: Genetic coding that determines all the characteristics of living things. Lutkenhaus J: Assembly dynamics of the bacterial MinCDE system and spatial regulation of the Z ring. The Origin of Oxygen in Earth's Atmosphere. The cell walls of prokaryotes differ chemically from the eukaryotic cell walls of plant cells, which are primarily made of cellulose.

Which Of The Following Statements About Cyanobacteria Is True Apex

Foley EA, Kapoor TM: Microtubule attachment and spindle assembly checkpoint signalling at the kinetochore. Seven thousand years ago, a species of oryx indigenous to the Arabian Peninsula was separated when an earthquake caused an insurmountable barrier to form between different geological segments of the population. 2011, 108: 11075-11080. Does that take us back to what the original eukaryotic cell might have looked like? But as soon as you can set up an intracellular molecular transport machinery such as a filamentous cytoskeleton and associated molecular motors, then having the genome be readily accessible to diffusive transport becomes less of an issue, freeing up eukaroytic cells to become physically large. These include the Rho GTPase superfamily, which act as master regulators for actin cytoskeletal assembly [98], the Rab GTPases that govern many aspects of membraneous organelle identity [99], the Arf GTPases that are also associated with membrane traffic [100], the Ran GTPase that governs the directionality of nuclear import and export [101], and the heterotrimeric G proteins that influence so many aspects of eukaryotic cell-to-cell signaling [102]. Responses will vary. Which of the following statements about cyanobacteria is true religion. In sickle-cell disease, a single point mutation in hemoglobin changes one charged residue on the surface to a neutral residue [64], and now in this dense cellular bag of the erythrocyte, filled almost entirely with one protein, you have a condition where the oxygen-depleted form of hemoglobin is able to self-assemble into a spectacularly beautiful helical structure with 14 protofilaments that looks absolutely classically like a microtubule or some other cytoskeletal filament [63] (Figure 3b). If filaments form spontaneously and then come together through purely entropic effects, there is no intrinsic reason for them to assemble in a particular orientation. But the heart of both of those motors is the nucleotide switch that converts hydrolysis into a large-scale protein conformational change resulting in stepping movement.

Crane HR: Principles and problems of biological growth. There are plenty of examples of mixed polarity filament bundles in bacteria. This is the second major group of cytoskeletal regulators, after the nucleating proteins, that I suspect might simply be missing in bacteria. 1186/1741-7007-11-110. There are certainly exceptions to this - there are bacteria that are large and complicated and there are eukaryotes that are small and simple - but if you just look at any random bacterium versus a random eukaryote, it is clear that there is a fundamental quantitative and qualitative difference in size and complexity.

Which Of The Following Statements About Cyanobacteria Is True Religion

So again, my premise is that since we must now accept that bacteria do have a dynamic cytoskeleton, we must now try to understand why they don't do something more interesting with it, and when I say 'interesting' I mean in my eukaryotic-centric view becoming larger, more morphologically complex, or multicellular. They cover every imaginable surface where there is sufficient moisture, and they live on and inside of other living things. For example, photosynthetic bacteria often have extensive membrane folds to increase surface area for the light-dependent reactions, similar to the thylakoid membranes of a plant cell. Sowa Y, Berry RM: Bacterial flagellar motor. A salt concentration of at least 0.

Assume that the spread in impact points is given by. These organisms, called eukaryotes, can be unicellular or multicellular and include animals, plants, fungi and protists. So I think it must be that bacteria simply have a fundamentally different strategy for cytoplasmic organization as compared to eukaryotes. I think you could argue that once you commit to a certain kind of dynamic strategy for your cytoskeletal filaments, back in the ancient past - maybe 3 billion years ago, when the modern version of FtsZ first came into being - then it's not worth changing it. Well, on the both ends of our linear DNA there are what we call telomeric regions, or telomeres. Synthetic compounds found in an organism but not normally produced or expected to be present in that organism are called _____. The nucleus holds the eukaryotic cell's DNA. The simple structures that can be made from polarized filaments I will call type A structures. You mean bacterial motors such as flagella and pili and so forth? Other inclusions include lipid droplets, volutin granules(polyphosphate), etc. In fact, it is so beautiful that in the United States, the anti-evolutionary creationists seized upon it as being something so fantastic that it could not possibly have evolved [86]. Raskin DM, de Boer PA: Rapid pole-to-pole oscillation of a protein required for directing division to the middle of Escherichia coli. 1998, 180: 2050-2056. They use the energy of nucleotide hydrolysis to switch between at least two distinct conformations.

Which Of The Following Statements About Cyanobacteria Is True Religion Outlet

Yes, and the flagella of motile bacteria differ in structure from eukaryotic flagella. Doemel WN, Brock TD: Bacterial stromatolites: origin of laminations. The other kind of structure that is very easy to make is a mixed polarity bundle. V. A dorsal, tubular nervous system. Mahadevan L, Matsudaira P: Motility powered by supramolecular springs and ratchets.

C. Salt breaks down the peptidoglycan found in the capsule of prokaryotes. The greatest number of amino acid differences will be found between species of different __________. In fact, our life would not be possible without prokaryotes. Mechanical difference. All chordates are deuterostomes, not protostomes. How would you explain to them that they are wrong? Now there are two really nice things about helices. Nédélec FJ, Surrey T, Maggs AC, Leibler S: Self-organization of microtubules and motors.

Sun Q, Margolin W: FtsZ dynamics during the division cycle of live Escherichia coli cells. But when people started doing very careful kinetic studies on the bacterial cytoskeletal proteins - and this I think has been done best for FtsZ [53] and for ParM [54] - it became clear that nucleation for the bacterial cytoskeletal proteins is actually very, very fast. Now, let us find the solution from the options-. The overall argument about the origins of morphological complexity that I want to make here applies equally to bacteria and archaea, but I'm going to focus on bacteria for specific examples just because we know so much more about them. In animal cells, these processes rely on the actin cytoskeleton [21], and there is evidence that similar cytoskeleton-based processes are also necessary for simpler kinds of multicellularity in non-metazoan eukaryotes such as Dictyostelium[22] and Volvox[23].

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