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.
Be Big. 1  Warm blooded animals in cold climates are pretty large, even the smallest Antarctic birds are on the large side and the smallest Antarctic penguin, the Rockhopper is a fairly hefty 2.5kg (5.5lb). The Adelie and Emperor penguins of the deep south are larger still.