Problem 1
Briefly describe the components of DNA, and explain its functional relationship to RNA and protein.
Problem 3
Match the following examples of mutagens. Column A a. A mutagen that is incorporated into DNA in place of a normal base b. A mutagen that causes the formation of highly reactive ions c. A mutagen that alters adenine so that it base-pairs with cytosine d. A mutagen that causes insertions e. A mutagen that causes the formation of pyrimidine dimers Column B 1\. Frameshift mutagen 2\. Nucleoside analog 3\. Base-pair mutagen 4\. Ionizing radiation 5\. Nonionizing radiation
Problem 5
When iron is not available, \(E\). coli can stop synthesis of all proteins, such as superoxide dismutase and succinate dehydrogenase, that require iron Describe a mechanism for this regulation.
Problem 6
Identify when (before transcription, after transcription but before translation, after translation) each of the following regulatory mechanisms functions. a. ATP combines with an enzyme, altering its shape. b. A short RNA is synthesized that is complementary to mRNA. c. Methylation of DNA occurs. d. An inducer combines with a repressor.
Problem 90
Why are mutation and recombination important in the process of natural selection and the evolution of organisms?
