Biology 330: Exam 2 (DNA Structure & Replication) questions and answers well illustrated.

Biology 330: Exam 2 (DNA Structure & Replication) questions and answers well illustrated. What two elements were identified in an acidic compound that was isolated from the nucleus by Johann Miescher? - correct answers.Nitrogen & Phosphorus Why proteins were thought to encode information that pertains to inheritable traits? - correct answers.1. Inheritable traits are diverse, and therefore molecules that encode these traits must be diverse 2. Proteins are made of 20 amino acids, which are structurally diverse Which two macro-molecules make the Bacteriophage structure? - correct answers.Proteins & DNA In the cell, which macro-molecules are labeled using 35S-methionine and 32P, respectively? - correct answers.35S used to label proteins 32P used to label DNA Describe Hershey and Chase's experiments, what conclusions were made from this study? - correct answers.They put different labels on radioactive markers onto the proteins and DNA of the bacteriophages and then sent them towards host cells to see whether proteins or DNA was being injected into the cells. After all this it was seen that proteins remained on the outer surface while DNA was injected into bacterial host cells. Conclusion: DNA carries inheritable material What is the DNA nucleotide made of? - correct answers.1. 5-carbon sugar called 2'- deoxyribose 2. Phosphate group 3. Nitrogen-containing bases Which bases are purines and pyrimidines? Explain why they are classified this way. - correct answers.Purines = adenine & guanine Pyrimidines = thymine & cytosine Purines have carbon and