Lec04 - DNA molecule described as double helix WE EXPRESS...

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Unformatted text preview: DNA molecule described as double helix. WE EXPRESS OUR DNA as we need it………. 1. The ENTIRE DNA MOLECULE can Replicate: Then You have 2 from 1 (DNA REPLICATION---Leads to MITOSIS ..one cell goes to two cells. OR 2. Selected sections of the DNA strand (genes) can be expressed ( transcribed and into mRNA and Translated into proteins) We know that it is HIGHLY CONDENSED and COMPLEXED WITH PROTEINS Called HISTONES Into complexes called NUCLEOSOMES …see next 2 SLIDEs. HINT: REMEMBER the actual DNA molecule is a polymer of nucleotides as you view the next slide keep that in mind and watch the molecule condense and become “complexed” with proteins into nucleosomes. Duplicating Genetic Information Information about you is in the sequence of nucleotides in the DNA molecule In each of your cells, there is about 2 meters of DNA per nucleus How does the DNA condense into such as small area? DNA histones chromatin DNA Helicases: Unwind DNA Double Strand Primers: Short strand of nucleotides DNA polymerases : position nucleotides along the template DNA strand DNA Ligases: Splice together short segments of new Humans Have 46 Chromosomes 23 pairs 2n = 46 2 is the number of copies of each chromosome n = the number of different chromosomes 46 is the total number of chromosomes in the cell 2n is called the DIPLOID NUMBER Duplicating Genetic Information Duplicating Genetic Information...
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Lec04 - DNA molecule described as double helix WE EXPRESS...

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