Indicate the order of the point mutations in the rII region.
Shown below are the maps of a series of rII- deletion strains (1–5). The deleted region is indicated as (......) and the intact region as ______. Note that strain 5 carries two different deletions.
1 ___________(...........)_______________
2 _________________(...........)_________
3 (.....................)_____________________
4 ________________________(................)
5 _____(..........)________________(.........)
rII- phage strains A-E have point mutations in the rII region. E.coli K(?) cells are coinfected with one phage that has a deletion and one phage that has a point mutation. The presence of wild-type progeny phage is assessed by the presence (+) or absence (o) of plaques.
A) CADBE
B) DEBAC
C) BADCE
D) ABDEC
E) CEADB
Additional question (answer with TRUE or FALSE) :
The test described here depends on recombination.
A) CADBE
Additional answer : FALSE
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As DDT accumulates in the tissues of carnivores at increasing trophic levels, the concentration increases; this is representative of ________
Fill in the blank(s) with correct word
Transfer of genetic materials which involves sex pilus
A. Transduction B. Transformation C. Conjugation D. Transposition
A strain of Neisseria gonorrhoeae has undergone a mutation and is no longer able to make pili. Predict the most likely outcome.
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