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).
1. RNA is usually single stranded while DNA is usually double stranded... 2. RNA nucleotides contain ribose as their sugar and DNA contains deoxyribose (a type of ribose without one oxygen molecule) 3. RNA uses the base Uracil which binds to Adenine while DNA uses Thymine as a base that binds to Adenine.. RNA contains the nitrgoenous base uracil instead of the nitrgoenous base thymine found in DNA. 3. RNA is usually single stranded unlike DNA which is a double helix.