Unformatted text preview: a gene encodes an enzyme (296-298) "one gene - one enzyme" note particularly Fig. 14.21 later work showed that proteins have specific sequences of amino acids (p. 298) At about the same time, genes were shown to be somehow made of DNA Chemists had long ago shown that DNA was a string of nucleotides covalently connected If one gene led to one protein, what hypothesis was proposed for the question: How does a gene structure specify a protein structure? IV. The connection: the genetic code (304-305) But the connection involved a third molecule: RNA (and that will be where lecture 19 begins . ..) Question about DNA structure and chromosome structure: In a tetrad of prophase I, how many strands of DNA are there? (each "strand of DNA" is a separate covalently linked molecule of DNA)...
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- Winter '08
- DNA, DNAs, replication replication fork