MCAT Biological and Biochemical Foundations 2
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The electron transport chain, which is embedded in the mitochondrial membrane, exists primarily to generate new molecules of ATP for use by the cell. This is accomplished by a positive gradient of H+ ions that are formed outside the membrane which then pass back through a specialized channel known as ATP synthase. The energy created from this phosphorylates an ATP to an ATP, known as oxidative phosphorylation. The mechanism by which H+ returns to the inside of the mitochondria is known as what?






MCAT Exam Information

MCAT stands for Medical College Admission Test. This test is used by almost every medical school in the United States and Canada. The MCAT is made up of 4 different sections: 

  • Biological and Biochemical Foundations of Living Systems
  • Chemical and Physical Foundations of Biological Systems
  • Psychological, Social, and Biological Foundations of Behavior
  • Critical Analysis and Reasoning Skills

Medical school is a very competitive field. Studens will want to do anything in their power to get a top score on the MCAT. You can review our other free MCAT practice tests for additional help. If you are truly serious about getting a top score, consider a MCAT prep course to help you study. 

MCAT Section Breakdown

You can review a more in-depth breakdown of the MCAT sections below: 

  • Biological and Biochemical Foundations of Living Systems - 59 questions in 95 minutes
  • Chemical and Physical Foundations of Biological Systems - 59 questions in 95 minutes
  • Psychological, Social, and Biological Foundations of Behavior - 59 questions in 95 minutes
  • Critical Analysis and Reasoning Skills - 53 questions in 90 minutes

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