Mitochondrial diseases result from failures of the mitochondria, specialized compartments present in every cell of the body except red blood cells. Mitochondria are responsible for creating more than 90% of the energy needed by the body to sustain life and support growth.When they fail, less and less energy is generated within the cell. Cell injury and even cell death follow.itochondrial DNA encodes just 37 of these genes; the remaining genes are encoded in the cell nucleus and the resultant proteins are transported to the mitochondria. Only about 3% of the genes necessary to make a mitochondrion (100 of the 3000) are allocated for making ATP.
No. Penguins are birds and birds are not mammals. They are animals of course, but mammals in general do not lay eggs, they nurse their young, and they have fur, not feathers. The duck-billed platypus, which seems to be stuck somewhere in middle, lays eggs, but has fur and does nurse its young.
Though, like most birds, are capable of flight, bats are mammals. In fact they are the only mammals that are capable of flight. For one thing bats have mammary glands, fur, give live birth and feed their young on milk. Birds on other hand have feathers. Birds are the only animals to have feathers. Bats are covered in fur. Though both bats and rodents are mammals they are completely different orders. Bats are in an order to their own. For one thing bats don't have gnawing teeth. Most bats feed on insects.