Background In a biosynthetic pathway (a series of chemical r…

Background In a biosynthetic pathway (a series of chemical reactions that build complex molecules), the final product often prevents the first step of the pathway from occurring. This helps regulate the process and prevent the overproduction of the end product (aka runaway enzyme action). Question What is the name of the regulatory process that prevents excessive enzyme activity and overproduction of a final product?

Background Cystic fibrosis is a genetic disease that causes…

Background Cystic fibrosis is a genetic disease that causes thick mucus buildup in the respiratory tract, leading to frequent infections. This is due to a faulty membrane protein responsible for the passive transport of chloride ions (Cl⁻). Although the protein is present in cell membranes, it does not function properly. Imagine you’re zooming in on a cell in someone with cystic fibrosis. Question What is going wrong at the level of molecules and ions within that cell? Specifically, explain how the problem with chloride ion (Cl⁻) movement affects the way the cell produces and handles mucus.

Cassie went to see a psychiatrist. When asked a question, sh…

Cassie went to see a psychiatrist. When asked a question, she would answer with things that didn’t make sense and rhymed. For example, when asked the color of her dress, she said, “Blue, like a shoe.” When the psychiatrist asked her why it is like a shoe, she said, “Because there’s two.” Cassie’s speech demonstrates ______, sometimes seen in patients diagnosed with schizophrenia.