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 -2023 G.C Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website. Previous123456789101112131415161718192021Next 20. Which one of the following comparisons is true about primary and secondary successions? Secondary succession has reduced species diversity. reduced total biomass of the community. has slower progress to reach to the climax. more stable community. 21. Which one of the following processes takes place when lactate is produced? NAD and FAD are regenerated from reduced NAD and FAD. ATP is produced through oxidative phosphorylation. Protons accumulation created in the inter-membrane space. Reduced NAD supplies hydrogen and becomes oxidized itself. 22. Which one of the following structures of the photosystem is correctly related with its function? Chlorophyll a - a reaction center molecule Antenna complex -light dependent reaction begins Carotenoid - provides the hydrogen ions Thylakoid - absorbs blue and red pigments 23. What happens during the electron transport system of respiration? The four-carbon compound undergoes molecular transformation to generate oxaloacetate. hydrogen atoms carried by FADH and NADH are released and split into protons and electrons. citrate losses a carbon atom to form a five-carbon atom compound and CO2. five carbon compound is further decarboxylated to form a four-carbon compound. 24. In a dihybrid self-crossing of a plant with genotype DdCc, 3600 offspring were produced. How many of the offspring will have the ddcc genotype? 300 450 150 225 Previous123456789101112131415161718192021Next 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!