Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 2596
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.

More Questions
TLS Online TPP Program

#Question id: 19195

#Unit 13. Methods in Biology

Choose the correct statement for genomic libraries.
TLS Online TPP Program

#Question id: 19293

#Unit 13. Methods in Biology

Choose the incorrect statement for the preparation of genomic libraries.
TLS Online TPP Program

#Question id: 19294

#Unit 13. Methods in Biology

The various steps for construction of libraries are ___________
i) Fragmentation of DNA
ii) Isolation of genomic DNA
iii) Amplification
iv) Ligation and introduction to the host
v) Vector preparation
The correct order of construction of libraries is (In the order of starting to ending).
TLS Online TPP Program

#Question id: 19295

#Unit 13. Methods in Biology

in genomic library To avoid ligation of separate DNA fragments, which of the enzyme is used?
TLS Online TPP Program

#Question id: 19296

#Unit 13. Methods in Biology

Which vectors carry the longest foreign DNA fragments?
TLS Online TPP Program

#Question id: 19297

#Unit 13. Methods in Biology

What is the main use of a Bacterial Artificial Chromosome (BAC) vectors?