Biology 2015 E.C - 2023 G.C 2014 E.C - 2022 G.C Chemistry 2015 E.C - 2023 G.C Civics and Ethical Education 2015 E.C - 2023 G.C English 2015 E.C - 2023 G.C Geography 2015 E.C - 2023 G.C History 2015 E.C - 2023 G.C Physics 2015 E.C - 2023 G.C Biology - Grade 12 -2022 G.C Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website. Previous12345678910111213141516171819Next 46. The hydrogen ions that used to turn the rotor of ATP synthase come from phosphorylation of ADP. oxidation of NADH and FADH2 hydrolysis of ATP. reduction of NADH and FADH2. 47. What triggers fermentation during exercise? Shortage of oxygen Over activity of respiratory enzymes Production of ATP beyond the cells demand Presence of excess glucose 48. Which of the following processes explains lactate production during anaerobic respiration in animal cells? Oxidation of pyruvate Decarboxylation of pyruvate Phosphorylation of pyruvate Reduction of pyruvate 49. Which one of the following descriptions holds true for the link reaction of respiration? Pyruvate reacts with coenzyme A to form acetyl coenzyme A. Glucose is converted to pyruvate through a chain of reactions. Hydrogen ion and ATP are synthesized. Reduced NAD and reduced FAD are produced. 50. Which one of the following is the neo-Darwinian idea of evolution? Evolutionary changes occur due to inheritance of acquired characteristics. natural selection through genetics and behavior. use and disuse of anatomical structures. competitions between living organisms. Previous12345678910111213141516171819Next We have provided these questions from previous years grade 12 Ethiopian Secondary School Leaving Certificate Examination (ESSLCE) exams with the sole purpose of assisting students in their studies and preparations for upcoming exams. Please be aware that these questions are not indicative of future exam content. Good luck with your studies!