As Diagrammed Below, Some Amino Acid Biosynthetic Operons Have Stem

question 70

Multiple Choice

As diagrammed below, some amino acid biosynthetic operons have stem loop structures in the mRNA. These structures play a role in the regulation of the operon by which of the following mechanisms?

• A) The leader sequence shown contains codons for the amino acid. When these are low, the ribosome stalls, allowing a hairpin between the two middle regions to form so that the rest of the message can be translated.
• B) A repressor protein made of that amino acid will bind to the region and prevent translation when large amounts of the amino acid are present.
• C) In the presence of large amounts of the amino acid, the hairpin will wind around the amino acid and prevent further translation.
• D) The uridine-rich region has codons for that amino acid; when present, this region will be a terminator region. The hairpins allow for an RNA to bind that then allows translation to occur.
• E) Catabolite repressor protein can bind and prevent the hairpins from forming, thus allowing translation to occur.

Recognize the signs and symptoms of disorganized speech and behavior in schizophrenia.

Understand the concept of negative and positive symptoms in schizophrenia and their manifestations.

Identify factors that influence the risk and course of schizophrenia.

Recognize the signs and symptoms of dissociative disorders and their diagnostic criteria.

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Definitions:

Public Good

Goods that are non-excludable and non-rivalrous, meaning that individuals cannot be effectively excluded from use and where use by one individual does not reduce availability to others.

Nonexcludable

Nonexcludable goods are those that cannot feasibly or reasonably be kept from individuals who do not pay for them, one of the characteristics of public goods.

Nonrival

A characteristic of a good whereby one person's consumption does not prevent or decrease the ability of others to enjoy it as well.

Private Good

A product or service that is consumed by a single individual or household and cannot be used or consumed by others simultaneously.