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A new virus is infecting people’s hearts. This virus is specific to the cardiac muscle and spreads through gap junctions. When it encounters cells without gap junctions, it forces those cells to express the proper proteins and form gap junctions to the next cell. As a result of the viral […]

Mutations: A mutation is defined as a changein the base sequence of DNA. This may occur as a“mistake” in DNA replication, for example. Suppose that during DNA replication, two mutant DNA sequencesare produced as shown below. For the 2 mutated DNA sequences, you will investigate how thesechanges might affect the […]

In the assay for the homotypic fusion of yeast vacuolar vesicles it was necessary to incubate the vesicles from two strains with NSF and ATP before they were mixed together. If they were not pre-treated in this way, the vesicles would not fuse. Why do you suppose that step was […]

1. Short regions of DNA sequence from four different organisms are shown below. Organism A         AGGTAAGTTACATTTGCAAGCTCTATTGACGCCCOrganism B         AGGTAAGTTAGATTTGCAGGTCCTATTGACGCCCOrganism C         AGGTAAGTTAGATTCGCAGGTCCTATTGACGCCCOrganism D         AGCTAAGTTAGATTTGCAGGTCCTATTGACGCCC Here are the same sequences aligned below for you to highlight their differences in sequence: A) […]