Biochem Module 8 Exam Study Guide Questions And Answers |Updated 2026/2026

Biochem Module 8 Exam Study Guide Questions And Answers |Updated 2026/2026 from the matrix to the intermembrane space - ANSWER -During the electron transport chain, protons are pumped from ___ in the mitochondria. as protons flow through ATP synthase and back into the mitochondrial matrix - ANSWER -Energy released ___ is utilized for the synthesis of ATP. F1 - ANSWER -At which part of ATP synthase is ATP produced? muscle twitches, muscles weakness, and degradation of nerve cells - ANSWER An individual with the MERRF disease tends to have symptoms of inner membrane - ANSWER -In mitochondria, the molecule that produces ATP is located in the rotation of ATP synthase - ANSWER -What process results in ATP formation? F and F2 - ANSWER -Which of the following is not a part of ATP synthase? - F - Fo - F1 - F2 3 - ANSWER -Oxidative phosphorylation occurs in ___ phases. CAC - ANSWER -Oxidative phosphorylation uses NADH and FADH2 generated from the ___. synthesis of ATP from ADP + Pi - ANSWER -Oxidative phosphorylation is the synthesis of ___ from ___. ETC - ANSWER -Oxidative phosphorylation uses energy generated by the ___ reactions. After the first phase, the chemical reactions of the ETC provide energy from NADH and FADH2 to pump H+ ions from the mitochondrial matrix into the inter membrane space. These reactions also provide electrons and H+ to convert oxygen into water. Together, these reactions create a H+ gradient that allows H+ to flow through and rotate the ATP synthase in order to produce ATP. - ANSWER Oxidative phosphorylation occurs in 3 phases. The first phase is the flow of electrons from NADH and FADH2. What happens after this first phase is complete? A. The mitochondrion is the main site of oxidative phosphorylation, which can be attributed to its two-membrane structure. - The outer membrane is a bilayer that contains porin proteins, which allow ions and molecules to cross into the intermembrane space. The intermembrane space is located between the inner and outer membrane and contains solution. - The inner membrane is also a bilayer but is highly selective, allowing only select ions and molecules to cross. This selective characteristic of the inner membrane is critical for maintaining the specific concentrations of H+, ATP, and other species within the mitochondrial matrix. - The matrix is the innermost space of the mitochondrion and is where the citric acid cycle as well as parts of beta oxidation and the urea cycle occur. This close proximity of reaction cycles is efficient because it allows NADH and FADH2, produced by the citric acid cycle, to also partici - ANSWER -Describe the critical structure of the mitochondrion that are important for the production of ATP. A. What structural features of the mitochondrion support ATP formation. B. Where are the complexes of the ETC located. The chemical reactions of the ETC, through the oxidation of coenzymes produced by the CAC, create energy that pumps H+ ions into the intermembrane space of mitochondria. The accumulation of these H+ ions in the intermembrane space creates an H+ ion gradient. This H+ gradient provides the driving force for the rotation of ATP synthase, which results in the production of ATP. Therefore, the ETC is responsible for the production of ATP via oxidative phosphorylation. - ANSWER -According to the chemiosmotic theory, how is the ETC connected to ATP production? Explain in at least 4 complete sentences.a true - ANSWER -T/F: The majority of the reactions of the urea cycle occur in the cytosol. false - ANSWER -T/F: The majority of the reactions of the urea cycle occur in the mitochondrial matrix. false - ANSWER -T/F: FADH2 yields 2.5 ATP molecules after donating electrons and hydrogen atoms to the ETC. 2.5 ATP per NADH - ANSWER -How many ATP molecules does NADH yield after donating electrons and hydrogen atoms to the electron transfer chain (ETC)? 1.5 ATP per FADH2 - ANSWER -How many ATP molecules does FADH2 yield after donating electrons and hydrogen atoms to the electron transfer chain (ETC)? true - ANSWER -T/F: ATP is invested in the urea cycle. 3 - ANSWER -How many total ATP are invested in the urea cycle? false - ANSWER -T/F: There are 5 complexes associated with the ETC. 4 - ANSWER -How many complexes are associated with the ETC? false - ANSWER -T/F: In the production of ATP via ATP synthase, the H+ ions move from the mitochondrial matrix to the intermembrane space. true - ANSWER -T/F: In the production of ATP via ATP synthase, the H+ ions move from the intermembrane space to the mitochondrial matrix. 4 - ANSWER -The urea cycle involves ___ reactions (only those in the cyclic portion of the process). ornithine, arginine, and aspartate - ANSWER -What amino acids are involved in the urea cycle? malate - ANSWER -Fumarate reenters the mitochondrion as ability to hydrogen bonds with water and its high density of nitrogen in a small molecule - ANSWER -Urea is useful for excreting nitrogen from cells due to its