BA A 15 year old boy goes to the physician after stepping on a rusty nail. The physician is concerned that he may develop a tetanus infection and in addition to giving the boy antiserum, he gives him an injection of tetanus toxoid (inactivated tetanus toxin). Which of the following is accurate in terms of describing mechanism of action for this toxin?

BA Which of the following best describes the mode of transmission of both the bacterium the causes Lyme disease (Borrelia burgdorferi) and the bacterium that cases plague (Yersinia pestis)?

In prokaryotes, which DNA polymerase is responsible for removing the RNA primers and replacing them with DNA?

The DNA sequence that is complementary to 5′ AATTCGCTTA 3′ is

Which of the following is true about bases and base pairing in DNA?

Which of the following would be most likely to cause a frameshift mutation?

What is an important difference between prokaryotic and eukaryotic DNA that makes eukaryotic DNA replication and gene expression much more complex?

This figure illustrates an example of what type of alternative splicing? [Figure description: The pre-mRNA on the left can result in two different versions of final mRNA on the right- one with all three exons and one that is missing the middle exon.]

Which amino acid does every eukaryotic protein sequence begin with?

In terms of epigenetics, which of the following could result in a gene being expressed in heart tissue but NOT being expressed in lung tissue?