A researcher working on island biogeography mapped how isolation-controlled immigration (I), and area-controlled extinction (E), will act on number of species present on the islands. He forgot to label the size of the islands (small or large) and the location of the islands (near or far) on the graph.

Using information from MacArthur and Wilson's equilibrium theory, select the option that correctly identifies A, B, C and D in the figure above. 

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#Question id: 5806

#Unit 8. Inheritance Biology

Which of these is NOT a mechanism by which a chromosome rearrangement could affect gene function?

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#Question id: 19090

#Unit 4. Cell Communication and Cell Signaling

Fusicoccin effects role of which plant hormone?

a) Gibberellin

b) Auxin

c) Cytokinin

d) ABA

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#Question id: 11599

#Unit 6. System Physiology – Plant

Where the highest levels of gibberellins are found?

TLS Online TPP Program

#Question id: 27629

#Unit 1. Molecules and their Interaction Relevant to Biology

Length of alpha helix can be calculated  by using

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#Question id: 13088

#Unit 13. Methods in Biology

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.

 

What is the Colony 1’s plasmid is;