What are the expected results for the Meselson and Stahl experiment after 3 generations (i.e, 3 rounds of DNA replication in the presence of light nitrogen)? Note: during generation zero, the DNA is all heavy, and subsequent generations only make light DNA.

A codon is 5’-CCA-3’.  An anticodon that would recognize this codon would be

The wobble rules for tRNA-mRNA pairing are shown in this quiz. If we assume that the tRNAs do not contain modified bases, what is the minimum number of tRNAs that are needed to recognize all of the proline codons?

A codon that specifies an amino acid near the amino terminus of a polypeptide would be

With regard to lac operon regulation via catabolite activator protein (CAP), which of the following statements is incorrect?

A codon is 5’-GGU-3’.  An anticodon that would recognize this codon would be

A tRNA has an anticodon that is 3′-CCU-5′. Which amino acid would it carry?

If a mutant sigma factor binds very tightly to RNA polymerase, how might that affect transcription?

For the following sequences, what is the consensus sequence?             5’-GGATAGGA-3’             5’-GCTTCAGA-3’             5’-GCATAGGG-3’             5’-GGATCGAG-3’             5’-GGTTCGGG-3’

With regard to lac operon regulation via catabolite activator protein (CAP), which of the following statements is correct?