Single membrane-bounded organelles are Bbibepute oAMH OTBer: a. Ribosomes b. Mitochondria c. Endoplasmic reticulum d. Centrioles

The correct answer is b. Mitochondria.<br /><br />Mitochondria are single membrane-bounded organelles found in eukaryotic cells. They are often referred to as the "powerhouses" of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP), which is used as a source of chemical energy. Mitochondria have their own DNA and can replicate independently of the cell's nucleus.<br /><br />Ribosomes (option a) are not membrane-bounded organelles; they are complex molecular machines found within all living cells. They perform protein synthesis, which is the process of translating the genetic code into proteins.<br /><br />The endoplasmic reticulum (option c) is a network of membranous tubules and sacs called cisternae. It is involved in protein and lipid synthesis, and it plays a role in the modification, folding, and transport of proteins. The endoplasmic reticulum is a double membrane-bounded organelle.<br /><br />Centrioles (option d) are cylindrical structures found in animal cells that play a role in cell division. They are not membrane-bounded organelles.