In the Meselson and Stahl experiment, E. coli cells were grown in heavy (15N) nitrogen, and then switched to light nitrogen. After two generations, there was 50% light and 50% half heavy DNA. What would the results have been if the conservative model had been correct? Below, put the expected […]

Q1. A doctor will give you an antibiotic to treat the bacterial infection, but you are given a vaccine to keep a virus (and some bacteria) from making you ill. What is the dissimilarity between these approaches? Q2. Explain the composition and function of the cell body. How are axons […]

A man has a heritable disease, which his father suffers from, along with his son. His father’s symptoms are comparatively light, where his sons are profound and seen at a much earlier age. What is a good explanation for the mechanism that is causing this inheritance pattern? trinucleotide repeats are […]

A researcher recently finds out a mutant mouse with an interesting T cell phenotype. He called this new mutation: HD,” bred the mouse and then used these founders to produce a strain homozygous for HD. Some of his findings are summarized in the table below:   Thymocytes Lymph node t […]