BY 108 Chapter Notes - Chapter 3: Terpene, Chlorophyll, Micelle
Document Summary
Nucleic acids - information storage devices of cells; 2 varieties. Can serve as templates to create exact copies of themselves. Deoxyribonucleic acid (dna) - the hereditary material. Ribonucleic acid (rna) - used to read dna in order to create proteins; used as a blueprint to create amino acid sequences finally able to be seen w/ scanning-tunneling microscope nucleotides - subunits of nucleic acids. Contains 5-carbon sugar, phosphate group, organic base. Purine - large, double-ring molecules; adenine, guanine (both in rna/dna) Pyrimidine - smaller, single-ring molecules; cytosine (in rna/dna), thymine (in dna only), uracil (in rna only) Made of difference combinations of 4 types of nucleotides (adenine, guanine, cytosine, thymine) 2 chains wrap around each other like a staircase (double helix shape) Adenine only complementary to thymine (in dna), uracil (in rna) Uses ribose sugar instead of deoxyribose (in dna) Has hydroxyl group where a hydrogen is in dna >> stops double helix from forming.
