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TLS Online TPP Program

#Question id: 4001

Which is not true about the lac repressor?

#Unit 3. Fundamental Processes

  1. Its gene is part of the lac operon and is transcribed along with lacZ, lacA and lacY.

  2. When it binds to DNA, it forms a loop-type structure.

  3. It likely blocks both RNA polymerase binding as well as transcription initiation.

  4. It binds to DNA by interaction of an α-helix with the major groove.

More Questions
TLS Online TPP Program

#Question id: 2002

#Unit 4. Cell Communication and Cell Signaling

What accounts for antibody switching (i.e., the switch of one B cell from producing one class of antibody to another antibody class that is responsive to the same antigen)?
TLS Online TPP Program

#Question id: 5308

#Unit 11. Evolution and Behavior

What can proteomics reveal that genomics cannot?
TLS Online TPP Program

#Question id: 33466

#Unit 1. Molecules and their Interaction Relevant to Biology

GC Major groove in DNA molecule show chemical information as
TLS Online TPP Program

#Question id: 365

#Unit 1. Molecules and their Interaction Relevant to Biology

Water is a polar molecule: the oxygen atom with its unshared electrons carries a partial negative charge (δ−) of ___________, and the hydrogen atoms each carry a partial positive charge (δ+) of __________, where e is the charge of the electron.
TLS Online TPP Program

#Question id: 11465

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following structure of lysine is exist at pH 6?