The antibiotic erythromycin disrupts protein synthesis by binding to the 50 S subunit and preventing ribosomal translocation. No other step in protein synthesis is affected. If you are performing an in vitro translation reaction and add erythromycin just before the 3rd bond that is about to be made and wait a few minutes to look at the ribosome, you will find the tRNA in site A carrying? an amino acid a polypeptide neither O either one

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Defense Mechanism

Circumstances influence and compel people to behave in a certain way. One such behavior is a defense mechanism. It is employed by people to escape from unpleasant circumstances, thoughts and actions. Defense mechanisms are, thus, psychological strategies that help to avert and avoid unwanted feelings such as guilt or shame and situations such as threat and danger.