An autotroph is an organism that prepares its own food using simple organic materials whist a heterotroph is an organism that cannot prepare its own food but depends on other organisms for survival.
Two potential functions that eukaryotic cells perform to regulate transcription are DNA methylation: a process of epigenetics that participates in the regulation of the gene expression in two ways, directly impeding the union of the transcription factors, and indirectly propitiating the closed structure of the chromatin, and Histone acetylation, enzymes that acetylate conserved lysine residues in histones by transferring an acetyl group from an acetyl-CoA molecule, to form ε-N-acetyl lysine, is extensively associated with an open chromatin structure and therefore accessible to transcription factors, which increases gene expression.
All of the above.
<h3>What are sulfur oxidizing bacteria?</h3>
Any of a wide range of microorganisms that can metabolize sulfur and its components and are significant in nature's sulfur cycle are known as sulfur bacteria. Hydrogen sulfide (H2S), sulfur, and thiosulfate are a few of the typical sulfur compounds that are used by these bacteria as a source of energy. Sulfate is the end result of the oxidation of sulfur.
In deep earth deposits, <em>Thiobacillus</em>, which is common in both marine and terrestrial settings, produces sulfuric acid, which dissolves metals in mines but also corrodes concrete and steel. It also oxidizes sulfur, generating sulfates that are helpful to plants.
I understand the question you are looking for is this:
In seawater, sulfate is the most common anion after chloride. Which of the following is correct with respect to the use of sulfate by some bacterial groups?
- Oxidized sulfur-containing molecules have redox potentials lower than those of the nitrogen series.
- Oxidized sulfur molecules such as sulfate and sulfite serve as electron acceptors.
- Sulfate and sulfite can receive electrons from hydrocarbons.
- Sulfate-reducing archaea and bacteria are widespread in the ocean.
- All of the above.
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The presence of the receptor in a cell for a particular hormone decide whether the cell is able to respond to a hormone. Cells which do not have a receptor are not directly influenced by hormone.
