acesupercoolme
Let the music be your master
- Joined
- Jan 3, 2007
- Messages
- 16,253
How do you do that...
How do you do that...
I read that kids who aren't given homework, do better in their exams in an average of 30%.
FISHIE!Why thank you.
![]()
Still on Biology...
1. Mononucleotides are made up of 3 parts. A 5-Carbon (or Pentose sugar), a nitrogen-containing base and phosphoric acid. The pentose sugar in RNA is ribose, and in DNA, deoxyribose. Deoxyribose has one less oxygen atom then ribose. There are two types of nitrogen-containing bases in mononucleotides. There is the purine base, which have two nitrogen-containing rings, and there is the pyrimidine base, which only has one. The rings have the chemical property of being bases because of the nitrogen atoms they contain. DNA contains combinations of four different bases with equal numbers of pyrimidines and purines. The purines are adenine (A) and guanine (G). The pyrimidines are cytosine (C) and thymine (T). In RNA, the thymine is replaced with uracil (U). A phosphate group (PO43−) is the third component of a nucleotide. Inorganic phosphate ions are present in the cytoplasm of every cell. This phosphate group makes the mononucleotides. The sugar, base and phosphate group are joined together by condesation reactions to form the nucleotide.