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TLS Online TPP Program

#Question id: 2870

In Escherichia coli, the synthesis of tryptophan is controlled by the tryptophan operon that is repressed in the presence of excessive tryptophan. When a mutant strain that has lost the regulatory gene of the tryptophan operon is placed in a medium that contains all nutrients the cells need to grow except tryptophan, which of the following will occur?

#Unit 2. Cellular Organization

  1. The cells will continue to grow even though excess tryptophan is synthesized.

  2. The cells will grow until excessive tryptophan arrests the expression of the operon.

  3. The cells will not grow until enough tryptophan has been synthesized to activate the corepressor.

  4.  The cells will never grow unless tryptophan is added to the medium.

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TLS Online TPP Program

#Question id: 2842

#Unit 2. Cellular Organization

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TLS Online TPP Program

#Question id: 2844

#Unit 2. Cellular Organization

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TLS Online TPP Program

#Question id: 2845

#Unit 2. Cellular Organization

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TLS Online TPP Program

#Question id: 2846

#Unit 2. Cellular Organization

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TLS Online TPP Program

#Question id: 2847

#Unit 2. Cellular Organization

Select the answer that describes a region of DNA in which genes are likely to be located.
TLS Online TPP Program

#Question id: 2848

#Unit 2. Cellular Organization

Select the answer that names the three functional elements that are required for replication and stable inheritance of chromosomes