The tangent plane at the point x=a, y=b is the plane that contains all the tangent vectors (at the point) of curves on the surface that pass through the point (a,b,f(a,b)). Another way to define it is to say that this is the plane through the point (a,b,f(a,b)) which is perpendicular to the NORMAL to the surface at that point. The NORMAL to the surface at a point is just defined as the direction perpendicular to all tangent vectors to the surface at that point. Therefore all we need to do to find the equation of the tangent plane is to find a normal to the surface at that point.
Apart from adenine (A), cytosine (C), guanine (G), thymine (T) and uracil (U), DNA and RNA also contain bases that have been modified after the nucleic acid chain has been formed. In DNA, the most common modified base is 5-methylcytosine (m 5 C). In RNA, there are many modified bases, including those contained in the nucleosides pseudouridine (Ï), dihydrouridine (D), inosine (I), and 7-methylguanosine (m 7 G).
The molecular unit from which DNA and RNA are made. In DNA, a nucleotide consists of a 'base' [adenine (A), guanine (G), cytosine (C) or thymine (T)] linked to the sugar deoxyribose and a phosphate group. Many nucleotide units joined together via their sugar-phosphate groups make up a DNA molecule.In RNA, the sugar is ribose and the base thymine is replaced by uracil (U). The sequence of a DNA or RNA molecule is usually described as the sequence of its bases, eg AAAAGTTCGTCTAGGTC.omething like the three parts that make up DNA is Phosphate, Deoxyribose Sugar, and Nitrogen Base. I am not looking for the three types of RNA that help build proteins.