But which one? It was supposed to be deoxyribonucleic acid. There was no evidence, however. Avery, McLeod, and McCarthy were able to chemically isolate pure deoxyribonucleic acid from pneumococcal cells. It took a dozen and a half operations to make thin threads fall out of the last solution. They could not only be seen with the naked eye, but even wound on a glass rod. This was the “transforming agent" - it was worth adding it to the nutrient medium, as a harmless and capsule-free microbe turned into its deadly brother. However, this experiment did not give an unambiguous answer to the question of whether deoxyribonucleic acid is a genetic record. The virus helped to resolve the dispute - a strange manifestation of life, so strange that it is still often called "either a creature or a substance" to this day. The secret of the activity of viruses has not been understood for a long time. The virus is completely devoid of the ability to live independently - it can exist (more precisely, multiply) only inside a foreign cell. Viruses are half composed of deoxyribonucleic acid and half are protein. The protein can be dissolved and only pure deoxyribonucleic acid left. And if this thread lacking protein, the most important sign of life, is inserted into the desired cell, then after a certain time, several hundredth of completely “complete” virus particles will form. In short, the virus needs only deoxyribonucleic acid to carry out the “life program”; it does not need anything else. The protein included in its composition is a package and a mechanism for penetrating inside a foreign cell. Its “code” is also recorded in the “program” and is reproduced regardless of whether a whole virus particle or pure deoxyribonucleic acid obtained by chemical means was used for infection. So, the “nuclein” of Friedrich Misher, many years after the discovery, finally found his true calling. Excellent! But ... Every great discovery in science only multiplies the number of perplexed questions. So it was this time. First of all, it was necessary to find out what exactly deoxyribonucleic acid was written in the thread, who reads these records and how, how she exercises her leadership and, finally, how deoxyribonucleic acid achieves such exact reproduction of the same signs over the course of many generations. Girls suck cock and build eyes guys on the other side of the screen, earning respect and money, of course. Live video chat, sexy webcam girls & home free cam porn Watch and download for FREE thousands of webcam porn videos and premium sex cam clips of famous pornstars and sexy teen girl models. Forget about free porn sites that only offer sex videos and try our live sex cams that provide instant live connections with the hottest cam models.