The processing of the 3' end adds a poly-A tail to the RNA molecule. First, the 3' end of the transcript is cleaved to free a 3' hydroxyl. Then an enzyme called poly-A polymerase adds a chain of ...

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Psychologists have explored the connections between free will beliefs—often gauged by agreement with statements like “I am in charge of my actions even when my life’s circumstances are ...

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So what does it mean if your dog chases its tail? While some reasons are more benign than others, the behavior can signal larger health concerns, says Alt. On a base level, it's normal for dogs to ...

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