DNA, because it tells the (ribosomes) how to make proteins.
Thrifty metabolism
Thrifty metabolism is the genetic
tendency toward efficient use of energy that results in below-average energy
requirements and increased storage of calories as fat. Thrifty metabolism
contributes to less weight lost when an obese person reduce the amount of his
calorie intake even though there is changes in metabolism.
Most tissues in the body are capable to repairing themselves but the type of tissue that is not readily repaired when damaged are is the tissue of the nervous system. This is due to the complexity of the brain and the spinal cord. Once damage is not, permanent paralysis happens.
the answer would be electrons