Do Now: 1. Turn in Lab (Strawberry DNA) 2. Begin working on the 10-1 review guide – it will be your homework tonight.

 RNA is a polymer of nucleotides, just like DNA.  There are a few important differences though: RNA processes information, DNA stores it. RNA is single stranded, DNA is double stranded. In RNA, the base uracil (U) replaces thymine (T)… there is no T in RNA RNA nucleotides contain the sugar ribose, not deoxyribose (That’s where the names come from)

 Single stranded  A-U, G-C  Many shapes possible

 DNA stores information (like a hard drive or thumb drive) and never leaves the nucleus of a cell.  RNA uses that information to make proteins. Can be found anywhere in a cell.

 There are 3 major types of RNA molecules, each with their own structure and function.  They are mRNA, tRNA, and rRNA.

 Ribosomes are made of rRNA – that’s where their name comes from.  rRNA is folded up on itself many times – making a ball-like, globular structure

 mRNA takes messages from the DNA to the rest of the cell.  mRNA is a copy of the instructions to make one protein.  mRNA’s structure is a straight chain of nucleotides, like a ribbon.

 tRNA has an unusual “cloverleaf” structure.  tRNA is needed during the protein- building process because it carries an amino acid and TRANSFERS it to the new protein.

 A dogma is a central belief, assumption or principle of thought.  The central dogma of how DNA controls a cell is simple:  DNA  RNA  Protein

DNA mRNA Protein Transcription Translation Replication

 For the remainder of the period, complete your RNA notes, then begin working on the 10-1 review.  We are DONE with 10-1, DNA. There will be a quiz tomorrow.  Coach class is tomorrow – be there if you need to be!