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COE Bio Wed, 3/11/15 Do Now • Take your seat • Please take out your notebook - we will be answering questions. Objective: • Banking Tasks Agenda: • Practice Questions • If you have been absent, or have missed tasks, check with me. • COE Task on Friday, 3/13 Homework: • Study these questions if you are not clear on the material DNA (in a nutshell…) • DNA is made of Nucleotides – the subunits of DNA • Nucleotides are: – Made up of sugar, phosphate, and a nitrogenous base – In DNA, there are four (4) possible bases: • • • • adenine (A) thymine (T) cytosine (C) guanine (G) In a nutshell… • It’s all about that base (A, T, C or G)! – The sequence of the four different nucleotides (A, T, C or G) allows DNA to code specific information • Code for amino acids > proteins > traits – Many combinations of bases allows a variety of information to be coded – Remember, when DNA replicates: • A binds with T (Apples in the Tree) • C binds with G (Carrots in the Ground) Salmonberry 2b Write this: Human Cell Number of Chromosomes How many pairs of chromosomes do we humans have in our BODY cells? 23 pairs of chromosomes So we have ____ total chromosomes. 46 chromosomes total per body cell How many chromosomes come from mom? 23 chromosomes How many chromosomes come from dad? 23 chromosomes ****So we have two “sets” of each chromosome – one set from mom and one set from dad. Can you tell me… What organelle is responsible for protein synthesis? What specific process (step of protein synthesis) occurs on this organelle? Protein Synthesis Protein Synthesis: Process of making proteins from DNA • Two main parts: 1. Transcription – DNA is “transcribed” (copied) into RNA in the nucleus. DNA mRNA (animation) 2. Translation – mRNA leaves the nucleus and travels to a ribosome in the cytoplasm. The coded info is “translated” into an amino acid sequence to make a protein. mRNA protein (animation) Additional animation Fill out this chart: What is it? Replication Transcription Translation Where does it happen in a cell? What bases bond together?