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TLS Online TPP Program
#Question id: 34102
#Unit 2. Cellular Organization
The CenH3 nucleosomes form the chromatin foundation for recruitment and assembly for
TLS Online TPP Program
#Question id: 27483
#Unit 1. Molecules and their Interaction Relevant to Biology
Compounds which have the same molecular formula and sequence of bonded elements, but which are nonsuperimposable, non-mirror images
TLS Online TPP Program
#Question id: 15621
#Unit 13. Methods in Biology
Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1–, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac–). During an condition Lac– strain, called lac3–, is linked to the Tn5 insertion. From a strain carrying the Tn5 insertion and lac3– mutation you isolate an F’ that caries a region of the chromosome that includes both Tn5 and the linked Lac region. Introduce this F’ into an F– strain carrying lac1– by selecting for Kanr. These merodiploids express ß-galactosidase normally. If the merodiploid were Lac–,
a) the two mutations lie in the different gene.
b) Both mutation are complement each other
c) the two mutations lie in the same gene.
d) Both of the mutations is dominant to wild type.
what could you conclude about the relationship between the lac3– and lac1– mutations from these statements?
TLS Online TPP Program
#Question id: 7033
#Unit 5. Developmental Biology
Fertilization can occur anywhere in the animal hemisphere of the amphibian egg. The point of sperm entry is important because it determines
TLS Online TPP Program
#Question id: 26512
#Unit 3. Fundamental Processes
Which of the following is incorrectly matched
