answersLogoWhite

0

Red blood cells are unique in that they have no nucleus or mitochondria. The lack of this organelle means that red blood cells must get their energy differently using a process called glycolysis to produce ATP. The lack of organelles means that there are various advantages and disadvantages that are considered. One advantage is the biconcave disk shape of the mammalian erythrocytes, which optimizes the cell for the exchange of oxygen with its surroundings and to make maximum space for hemoglobin. The cells are flexible in order to fit through tiny capillaries, where they release their oxygen load. On the other hand, the disadvantage is that because of the lack of nuclei and organelles, mature red blood cells do not contain DNA and cannot synthesize any RNA, and consequently they cannot divide or repair themselves, limiting their lifespan. Mitochondria enable cells to produce 15 times more ATP than they could otherwise, and complex animals, like humans, need large amounts of energy in order to survive. The lack of mitochondria means that the cells use none of the oxygen they transport; instead they produce the energy carrier ATP by fermentation, via glycolysis of glucose followed by lactic acid production. References: http://en.wikipedia.org/wiki/Red_blood_cell http://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0024929.html http://micro.magnet.fsu.edu/cells/mitochondria/mitochondria.html http://www.thetech.org/genetics/news.php?id=86

User Avatar

Wiki User

16y ago

What else can I help you with?