BIOL 1001 Lecture Notes - Lecture 12: Ribose, Transfer Rna, Rna Interference
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1 Mar 2018
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Structure of dna: double helix, a gene is a sequence of nucleotides in a dna molecule. Dna replication is semiconservative: each parent (template) strand remains intact, e(cid:448)ery dna (cid:373)olecule is half (cid:862)old(cid:863) a(cid:374)d half (cid:862)(cid:374)e(cid:449)(cid:863, goes in direction of 5 to 3. Dna base-pairing during dna replication: each old strand serves as the template for new complementary strand, enzyme is dna polymerase. Errors in dna replication: mistakes can occur during dna replication, enzymes (editing function of dna polymerase, when the error is not corrected mutation. Transposable elements: also known as transposons, transposase enzyme, usually inactive that gene, neurofibromatosis, harvest corn kernels of corn caused by insertion of a transposable element in anthocyanin pigment. Barbara mcclintock: ho(cid:449)ed i(cid:374) the (cid:1005)93(cid:1004)"s that the e(cid:374)ds of chro(cid:373)oso(cid:373)es (cid:449)ere special, she and mueller co-discovered telomeres, also showed that genes were arranged in a linear fashion on chromosomes of corn.
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