<span>Erwin Chargaff's research found that there are two pairs of nucleotides in the DNA molecule, adenine-thymine, and guanine-cytosine. Those two pairs of nucleotides are complementary and since they pair up in the DNA molecule, the amount of one nucleotide in the pair must be equal to the amount of the other nucleotide of the pair. He also found that different species have different proportions of nucleotides, which proved that DNA is the carrier of genetic information, not the proteins.</span>
Nasogastric tube is a narrow plastic tube used for providing nourishment or sucking out toxicated abdominal fluid from body.
The nasogastric tube is inserted through the nose and then passed through the nasopharyngeal space into the stomach.
This method is used to provide nourishment fluid and medication who are unable to eat in a normal way, for example, post operative cases, comatose patient etc.
The Nasogastric tube is also used to suck out poison in cases of poisoning when the subject is not in senses and cannot be made to vomit.
