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Chapter 14: Problem 13

What is meant by the term attenuation? Is it an example of gene regulation at the level of transcription or translation? Explain your answer.

Short Answer

Expert verified
Attenuation is a gene regulation method in bacteria, causing premature termination of transcription. Therefore, it is an example of gene regulation at the level of transcription, not translation.

Step by step solution

01

Understand Attenuation

Attenuation is a regulatory mechanism in bacteria that causes premature termination of transcription. It occurs in some operons such as the tryptophan operon, which are involved in the biosynthesis of amino acids.
02

Define Transcription and Translation

Transcription is the first step in gene expression where information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). Translation is the process where ribosomes in the cytoplasm or ER synthesize proteins after the process of transcription.
03

Compare Attenuation to Transcription and Translation

Since attenuation causes premature termination of transcription, it is a form of regulation at the level of transcription and not a translation.

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Most popular questions from this chapter

Would a mutation that inactivated lac repressor and prevented it from binding to the lac operator site result in the constitutive expression of the lac operon under all conditions? Explain. What is the disadvantage to the bacterium of having a constitutive lac operon?

How are the actions of lac repressor and trp repressor similar and how are they different with regard to their binding to operator sites, their effects on transcription, and the influences of small effector molecules?

In general, why is it important to regulate genes? Discuss examples of situations in which it would be advantageous for a bacterial cell to regulate genes.

Some mutations have a cis-effect, whereas others have a transeffect. Explain the molecular differences between cis- and transmutations. Which type of mutation (cis or trans) can be complemented in a merozygote experiment?

What is the difference between a constitutive gene and a regulated gene?
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