Answer the following statement true (T) or false (F). Experiment 2 depends on recombination.
A researcher is studying the rII locus of phage T4. Three rII- strains are obtained: A, B, C, and D. In the first experiment, E. coli strain K(?) is coinfected with two rII- strains simultaneously and the results are recorded.
Infection with A and B phage = plaques form
Infection with A and C phage = plaques form
Infection with B and C phage = no plaques form
Infection with B and D phage = no plaques form
Infection with C and D phage = no plaques form
In a second experiment, coinfections are performed first in E. coli strain B, then the progeny phage are used to infect E. coli strain K(?).
Progeny of A and B phage = plaques form
Progeny of B and C phage = plaques form
Progeny of C and D phage = plaques form
Progeny of B and D phage = no plaques from
Answer: TRUE
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In the universal ABO blood grouping system, there are four phenotypes - A, B, AB, and O - which are determined by
three different alleles. The presence of three alleles in the ABO blood grouping system is an example of ____.
a. a polymorphism b. genetic drift c. the bottleneck effect d. a dimorphism e. the founder effect
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A) can bind to a cation B) has a negative charge and can bind a cation C) has a negative charge D) has lost an electron
You are interested in developing a new antibiotic for treating bacterial illnesses in humans, which is specifically toxic to bacterial cells. What processes or proteins would you want to inhibit in bacteria to generate this antibiotic?
A. the SRP receptor B. sigma factor binding to the holoenzyme C. RNA polymerase II D. the enzymes that add a 5' cap to the RNA