Dating site based on dna these bases
The function of messenger RNA in the cell You will probably know that the sequence of bases in DNA carries the genetic code.Scattered along the DNA molecule are particularly important sequences of bases known as genes.The 3' end is the end where the phosphate is attached to a 3' carbon atom - or if it is at the very end of the DNA chain has a free -OH group on the 3' carbon. Every G on the coding strand is matched by a C on the template strand (and again vice versa).You may remember this diagram of a tiny part of a DNA chain from the first page in this sequence: If the left-hand chain was the coding chain, the genetic code would be read from the top end (the 5' end) downwards. If you took the template strand and built a new DNA strand on it (as happens in DNA replication), you would get an exact copy of the original DNA coding strand formed.Uracil can form exactly the same hydrogen bonds with adenine as thymine can - the shape of the two molecules is exactly the same where it matters. with that between adenine (A) and uracil (U): In DNA the hydrogen bonding between A and T helps to tie the two strands together into the double helix.
In fact, the enzyme is big enough to enclose not only the promoter sequence but the beginning of the gene itself.
These base sequences are known as promoter sequences.
Remember that the two strands of DNA are hydrogen bonded together.
Here the code is read and the protein is synthesised with the help of two other forms of RNA - ribosomal RNA and transfer RNA. I'm going to take this complicated process very gently - a bit at a time! Overall structure DNA has two strands arranged in a double helix. The sugar present in the backbone of the chain DNA (deoxyribonucleic acid) has a backbone of alternating deoxyribose and phosphate groups. RNA uses the base uracil (U) rather than thymine (T) The structure of uracil is very similar to that of thymine.
In RNA (ribonucleic acid), the sugar ribose replaces deoxyribose. The nitrogen shown in blue in the uracil is the one which attaches to the 1' carbon in the ribose.