1. When DNA samples A and B were separated by buoyant density centrifugation the two samples migrated 23 and 15 cm, respectively. If DNA B had a GC content of 34%, what was the GC content of DNA A? 2. If Meselson and Stahl found that the ratio of 15N-labeled […]

How could you do the following questions without drawing the punnett squares?1. If parents are heterozygous for all three traits, what isthe probability that an offspring is heterozygous for all threetraits?a.) 1/64b.) 2/64c.) 4/64d.) 8/64e.) 32/642. If the parents were heterozygous for all three traits, whatis the probability that an […]

You insert a 7 kb segment of mouse DNA into the SV40 chromosome (SV40 DNA = 7.5 kb), creating a recombinant viral chromosome. You then transfect a culture of chimpanzee kidney cells with this DNA. You proceed to isolate intact recombinant viral chromatin from the kidney cells. The chromatin is […]

LAB Book Used: Leboffe and Pierce (2016). Brief microbiology laboratory theory and application (3rd ed.) Englewood, CO: Morton Publishing. ISBN: 9781617314773 Exercise 2-13 (Chemical Germicides: Disinfectants and Antiseptics) 1. The concentrations of the potential germicides are very different. Why is ok to compare these agents at different concentrations? 2. Which […]