ANTH 1301 Lecture 4: Lecture 4
19 Oct 2015
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Document Summary
The nucleus of the cell contains dna and rna. * the mitochondria is a separate organelle, which contains mitochondrial dna (mtdna). mtdna serves a separate purpose than the other cellular nucleic acids. A separate nucleolus. holds all nutrients and turns it into energy. Composed of 2 chains called nucleotides: these chains are glued together centrally by a weak hydrogen bond, there are 4 types of nitrogen bases: a,g,t,c. *these nucleotide chains are bonded at their bases by phosphate to sugar to form an even greater dna chain (up to. 6 feet long in each cell), which then twists to form a spiral structure (aka the double helix). Dna replication: enables an organism to grow and heal. 1- enzymes (made of protein) break the bond in certain places throughout the previously complete, joined nucleotide chain (dna molecule). 2- unattached, incomplete single strands of nucleotide chains are being produced by other breaking and detaching nucleotide chains.
