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Created by experts, Khan Academy’s library of trusted, standards-aligned practice and lessons covers math K-12 through early college, grammar, science, history, AP®, SAT®, and more. It’s all free for learners and teachers.
We are thrilled to announce content improvements we have made to the Khan Academy MCAT course! These improvements include passage, question, and explanation updates to over 80 Biological and Biochemical Foundations of Living Systems (BBLS) passages included in the course.
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MCAT; Science; Middle school biology; Middle school Earth and space science; Middle school physics; High school biology. NEW. High school chemistry. NEW. ... Khan Academy is a 501(c)(3) nonprofit organization. Donate or volunteer today! Site Navigation. About. News; Impact; Our team; Our interns; Our content specialists; Our leadership;
What are the three phases required for fatty acid oxidation? Where in the cell do these reactions take place? How is this process regulated? Explore the three major phases of oxidizing and extracting ATP from fatty acids within a cell. Dive into the activation process, understand the role of coenzyme A, and learn about the transport process involving carnitine. Uncover the fascinating ...
We're thrilled to announce that Khan Academy will be retaining our FREE MCAT course until 2026 with the support of the Association of American Medical Colleges (AAMC). The feedback we heard from so many of you helped make this happen.
Stigma, both social and self, can deeply impact individuals, especially those with mental or medical conditions. Social stigma involves stereotypes, prejudices, and discrimination, often leading to isolation. Self stigma occurs when individuals internalize these negative views, affecting their self-esteem and societal participation. Media, society, family, and the individual all play roles in ...
Culture, a set of shared beliefs, values, and customs, varies globally. It evolves over time, adapting to new challenges and opportunities. Culture shapes our behaviors and values, often without us noticing. It's passed from one generation to the next, helping humans adapt to different environments.
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the reaction. A catalyst works by providing a different pathway for the reaction, one that has a lower activation energy than the uncatalyzed pathway. This lower activation energy means that a larger fraction of collisions are successful at a given temperature, leading to an increased reaction rate.