Exemptions for Reporting under the Securities and Exchange Act: Section 13B of the 1934 Securities Exchange Act provides that with matters pertaining to national security of the United States, the Executive Branch has the authority to exempt certain companies from the critical legal obligations outlined in the act.ection 13B of the 1934 Securities Exchange Act provides that with matters pertaining to national security of the United States, the Executive Branch has the authority to exempt certain companies from the critical legal obligations outlined in the act.
Eukaryotic Exceptions. Most eukaryotic cells -- those that contain nuclei -- also contain mitochondria, but there are exceptions to this rule. Some parasitic protists, for example, take energy from their hosts and do not have mitochondria, as explained by an article in the Journal of Eukaryotic Microbiology. In humans, mature red blood cells, or erythrocytes, lack mitochondria as well, as reported by the Encyclopedia Britannica.
Mitochondria are structures within cells that convert the energy from food into a form that cells can use. Although most DNA is packaged in chromosomes within the nucleus, mitochondria also have a small amount of their own DNA. This genetic material is known as mitochondrial DNA or mtDNA. In humans, mitochondrial DNA spans about 16,500 DNA building blocks (base pairs), representing a small fraction of the total DNA in cells.