TLS Online TPP Program

#Question id: 11634


Given below, is the result of a complementation test for six independent mutants (A to H) '+' represents complementation; '-' represents noncomplementation Based on the above, which one of the following conclusions is correct?

#Unit 8. Inheritance Biology
  1. All mutations belong to a single cistron, but their order cannot be determined

  2. The mutations can be ordered in a single cistron as A-C-E-B-D-F-H-G
  3. There are two cistrons, mutations A, C, E, G and H represents one cistron, B, D, F and G represent the second cistron.
  4. There are three cistrons, mutations A, C, E and H represents one cistron, B, D and F represent the second cistron and G represents the third cistron.
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TLS Online TPP Program

#Question id: 4342

#Unit 3. Fundamental Processes

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the operator to the far end of the operon, past the transacetylase (lacA) gene, which of the following processes would likely occur when the cell is exposed to lactose?

TLS Online TPP Program

#Question id: 4343

#Unit 3. Fundamental Processes

Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If a researcher moves the repressor gene (lacI), along with its promoter, to a position at some several thousand base pairs away from its normal position, which of the following results would be expected?

TLS Online TPP Program

#Question id: 4344

#Unit 3. Fundamental Processes

How does the transcription of structural genes in an inducible operon occur?

TLS Online TPP Program

#Question id: 4345

#Unit 3. Fundamental Processes

For a repressible operon to be transcribed, which of the following conditions must occur?

TLS Online TPP Program

#Question id: 4346

#Unit 3. Fundamental Processes

Which of the following results would occur if the repressor of an inducible operon were mutated so that it could not bind the operator?

TLS Online TPP Program

#Question id: 4347

#Unit 3. Fundamental Processes

According to the lac operon model proposed by Jacob and Monod, what is predicted to occur if the operator is removed from the operon?