What type of energy-yielding metabolism is found only in prokaryotes
With the exception of the mycoplasmas, the only bacteria that lack a cell wall, prokaryotic membranes lack sterols (def). Many bacteria, however, do contain sterol-like molecules called hopanoids. Like the sterols found in eukaryotic cell membranes, the hopanoids most likely stabilize the bacterial cytoplasmic membrane. In the latter case, organic compounds most often provide energy (chemoorganotrophic metabolism). There are also bacteria that use reduced inorganic compounds as an energy source (chemoautotrophic metabolism). All three types of energy generation may occur both in the presence and in the absence of molecular oxygen. 1 It is found in both Bacteria and Archaea, as well as in mitochondria and chloroplasts. 2  ZipA: A protein that connects the FtsZ ring to the bacterial cytoplasmic membrane. 3  FtsA: An ATPase that breaks down ATP to provide energy for cell division and also helps connect the FtsZ ring to the bacterial cytoplasmic membrane. The energy that the cell gains in the form of ATP and/or in the form of a primary electrochemical gradient of protons is utilized for all endergonic processes in the cell, such as assimilation of nutrients, biosynthesis of proteins and other macromolecules (assimilatory processes), and also for maintenance purposes. A. Bacteria and fungi B. Bacteria and archaea C. Protozoa and animals D. Archaea and fungi 2.Ribosomal RNA-based studies reveal that A. All eukaryotic organisms are related but that all prokaryotic organisms are not necessarily related. Best Answer: In prokaryotes similar processes occur across the cell membrane; endosymbionts are extremely rare. Prokaryotes have a larger surface area to volume ratio giving them a higher metabolic rate, a higher growth rate and consequently a shorter generation time compared to Eukaryotes. Chemolithotrophy is found only in prokaryotes and is widely distributed among Bacteria and Archaea. The spectrum of inorganic compounds that can be used as electron donors by chemolithotrophs is rather broad (H 2 S, S 0, S 2 O 3 2− , H 2, Fe 2+ , NO 2 − or NH 3). The cytoplasmic membrane, also called a cell membrane or plasma membrane, is about 7 nanometers (nm; 1/1,000,000,000 m) thick. It lies internal to the cell wall and encloses the cytoplasm of the bacterium (see Fig. Adenosine 5'-triphosphate, or ATP, is the most abundant energy carrier molecule in cells. This molecule is made of a nitrogen base (adenine), a ribose sugar, and three phosphate groups. The word adenosine refers to the adenine plus the ribose sugar. The most common type of continuous culture device is called a (n)_______. 24. Enzymes called _______ create small opening in the prokaryotic cell wall that are formed at the FtsZ ring. 25. The FtsZ protein is related to the eukaryotic protein _______, which is important in eukaryotic cells during mitosis. 26.
Chemolithotrophy