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TLS Online TPP Program

#Question id: 2621

The leaky expression of lac genes ensures that,

#Unit 2. Cellular Organization

  1. There is a normal level of b-galactosidase in the cell even in the absence of lactose

  2. Only allolactose binds to the Lac repressor and triggers a change in the shape of that protein.

  3. Allolactose has permanently altered the shape of the repressor.

  4. Only low level of b-galactosidase in the cell even in the absence of lactose.

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TLS Online TPP Program

#Question id: 23686

#Unit 13. Methods in Biology

Bacteria containing recombinant plasmids are often identified by which process?
TLS Online TPP Program

#Question id: 23687

#Unit 13. Methods in Biology

Bacteria that contain the plasmid, but not the eukaryotic gene, would grow
TLS Online TPP Program

#Question id: 23688

#Unit 13. Methods in Biology

Bacteria containing a plasmid into which the eukaryotic gene has integrated would grow in
TLS Online TPP Program

#Question id: 23689

#Unit 13. Methods in Biology

Bacteria that do not take up any plasmids would grow on which media?
TLS Online TPP Program

#Question id: 23690

#Unit 13. Methods in Biology

A principal problem with inserting an unmodified mammalian gene into a bacterial plasmid, and then getting that gene expressed in bacteria, is that
TLS Online TPP Program

#Question id: 23691

#Unit 13. Methods in Biology

A gene that contains introns can be made shorter (but remain functional) for genetic engineering purposes by using