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TLS Online TPP Program
#Question id: 3897
#SCPH28 | Zoology
Gene silencing by RNA interference acts by of the target gene.
TLS Online TPP Program
#Question id: 2719
#SCPH05 I Biotechnology
The distinct zig-zag appearance of the chromatin fibre is due to ____________
TLS Online TPP Program
#Question id: 13091
#SCPH05 I Biotechnology
To express a yeast gene in E. coli, your task is to design a strategy to insert the yeast gene into the bacterial plasmid. Below is a map of the area of the yeast genome surrounding the gene in which you are interested.
The distance between each tick mark placed on the line above is 100 bases in length
Below are the enzymes you can use, with their specific cut sites shown 5’-XXXXXX-3’ 3’-XXXXXX-5’
The plasmid is 5,000 bases long and the two farthest restriction enzyme sites are 200 bases apart. The plasmid has an ampicillin resistance gene somewhere on the plasmid distal from the restriction cut sites.
You do the digestion of the insert and the vector and then ligate the two digestions together. You then transform the ligation into bacteria and select for ampicillin resistance. You get three colonies on your transformation plate. You isolate plasmid from each one and cut each plasmid with the enzyme XbaI. You then run your three digestions on an agarose gel and see the following patterns of bands. Describe what each plasmid actually was that was contained in each of the three colonies.
Which colony’s plasmid do you actually want to use for your studies?
TLS Online TPP Program
#Question id: 12920
#SCPH06 I Botany
The development of isothermal systems such as the ____ DNA amplification system do away with the need for a thermal cycler and have the advantage of being able to be used outside the laboratory.
TLS Online TPP Program
#Question id: 4821
#SCPH28 | Zoology
What are frequency of recombination if one cell carry out cross over every 50 cell undergoes meiosis ?