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18 Dec 2019

An important difference between the ways that bacteria andmulticellular eukaryotes regulate gene expression is that______.

An important difference between the ways that bacteria andmulticellular eukaryotes regulate gene expression is that______.

bacteria make much more use of signals inside their cells
bacteria make little use of transcriptional regulation
multicellular eukaryotes only respond to signals from theirexternal environment
multicellular eukaryotes need to respond to signals from othercells much more than do bacteria

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Related questions

Most biologists argue that the regulation of gene expression isconsiderably more complex in eukaryotes than in bacteria. List thefour factors that in your view make the largest contribution tothis perception.

Select the four correct statements.

1. The coordinated regulation of sets of genes devoted to a singlefunction (e.g. metabolic pathways) allows minimal wasting of acell's resources on unneeded proteins and metabolites.
2. Multicellularity and cell-type specificity is frequent ineukaryotes and requires organisms to regulate large suites of genesin a cell-type-specific manner.
3. The chromatin structure of eukaryotic genomes allows thedifferential packaging of genes to be used in regulation.
4. Posttranslational processing of proteins allows cells toregulate the function of proteins after their synthesis by covalentmodification, transport, or both.
5. The extensive use of attenuation allows eukaryotes to fine-tunetranscriptional activity of a cell according to environmentalsignals.
6. Eukaryotic cells possess a nucleus, which separatestranscription from translation and allows RNA processing andtransport to be used in regulation.

In Eukaryotic transcription, what is the difference between an enhancer, a mediator, a coactivator and a trascriptional activator protein? In your answer, for each one include (a) if it's the term refers to a DNA sequence or a protein, and if it's a protein (b) if it interacts with DNA, with another protein, or with both. Also how are enhancers different from promoters in affecting gene transcription in eukaryotes? Make sure that you include in your discussion: (c) their relative position to the transcription initiation site; (d) the role of binding sites for proteins; (e) how each affects initiation and transcriptional regulation (in the latter, make a distinction between the core and the regulatory promoter

True or False????? HELP

1. In the field of epidemiology, increased prevalence of a disease in a population is the universal signal that disease control and treatment are not effective.

2. Cytoplasmic membranes of prokaryotes typically contain more proteins than cytoplasmic membranes of eukaryotes microorganisms.
3. Sanger (or dideoxy) DNA sequencing produces relatively short DNA sequence data, but is by far the least expensive DNA sequencing method currently available.
4. The (italicizes) abbreviation lac Z refers explicitly to the beta galactosidase protein/ enzyme.
5. Archaeal pathogens have been linked to some of the most virulent infectious diseases. 6. A bacterial mutant that is unable to make an amino acid required for growth (relative to its wild-type strain is termed an auxotroph.
7. When counting plaques to enumerate phage particles (as in the BIOL2026 Laboratory), the plaque represents lacK, not presence, of bacterial growth.
8. Because of competition with plant roots for nutrients, microbial numbers in the rhizosphere are typically much lower than in surrounding bulk soil.
9. Chemolithoautotrophy is the strategy that facilitates the existence of biological communities deep beneath the earth’s surface and near hydrothermal vents.

10. In a primary treatment (1 °) system of a municipal sewage/ wastewater treatment plant, the main goal is to remove ammonium (NH4+) using specific bacterial enrichment cultures.
11. The small intestine in human is the main site of microbial breakdown of partially digested food.
12. Root nodules of legumes contain nitrogen fixing bacteria.
13. Anoxygenic photosynthesis involves using/ removing electrons from H2O.
14. Algae and Cyanobacteria utilize generally the same two-photosystem biochemical mechanisms in the light- reaction of photosynthesis.
15. In bacteria, the only known reason proton motive force is generated is to power ATP synthase in cellular respiration/ oxidative phosphorylation.
16. Anaerobic respiration is only carried out by prokaryotes, however fermentation can be carried out by both prokaryote and eukaryal microorganism.

17. The general structure and biochemical “motors” of flagella are similar between Bacteria and eukaryotic cells, but fundamentally different in the Archaea.
18. Antibiotic resistance genes appeared in microbes (for the first time ever) only after human .. producing and releasing massive amounts of antibiotics to the environment.
19. Experiment by Esther Lederberg, and then later by Luria and Delbruck (that won them a Nobel prize), illustrated that genetic mutations in bacteria arose in the absence of selective pressures, rather than in response to selection.
20. Quaternary sensing is a mechanism used by bacteria to sense other bacteria and regulate gene expression accordingly (e.g. In the case of expressing the liac operon or initiating EPS production in biofilms).

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