311C F09 Worksheet_11+A - NAME _KEY_ Discussion Worksheet...

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NAME _________ KEY ____________ Bio 311C F09 Discussion Worksheet #11 1. Name the three components of a DNA nucleotide. PHOSPHATE GROUP (ON 5’ C OF SUGAR), NITROGENOUS BASE (A,T,C, G), PENTOSE SUGAR = DEOXYRIBOSE. 2. What are the base-pairing rules in a DNA double helix (which bases pair together across double helix)? How many hydrogen bonds form between each base-pair? A-T; 2 H-BONDS G-C; 3 H-BONDS 3. Briefly explain the semi-conservative model of DNA replication. EACH STRAND OF PARENT MOLECULE SERVES AS TEMPLATE FOR THE SYNTHESIS OF NEW DAUGHTER DNA MOLECULES. EACH DAUGHTER DNA MOLECULE IS CONSTRUCTED OF ONE ‘OLD’/PARENT STRAND AND ONE ‘NEW’/DAUGHTER STRAND. 4. Draw the results expected from the famous Meselson and Stahl experiment if the bacterial cells were allowed to replicate three times (3 rounds of DNA replication) in the medium containing 14 N assuming 5. What is the site of DNA replication initiation called? How many of these sites are typically found in a prokaryotic chromosome? How many in a eukaryotic chromosome?
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This note was uploaded on 12/11/2009 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas at Austin.

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311C F09 Worksheet_11+A - NAME _KEY_ Discussion Worksheet...

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