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 56. Which one of the following is an example of social behavior? Exaggeration of size by fluffing up of feathers Singing of frogs on spring nights Marking a territory with urine Caring for offspring that are not one's own 57. Consider the following reaction.Reactant A + Reactant B + Enzyme Intermediate → Product AB + Enzyme?At which point are the chemical bonds weakened? At the intermediate reactant A reactant B product AB 58. How do enzymes bind and act on their substrates? By using the lock-and-key model and reducing energy of the substrate induced-fit model and providing extra energy for the substrate lock-and-key model and changing themselves into products induced-fit model and putting the substrates under tension 59. Which of the following external factors influence the turnover rate of enzymes by completely damaging their tertiary structure? Competitive inhibitors Substrate concentration Reversible inhibitors Temperature and pH 60. During baking of injera, the CO₂ produced by yeast is used to kill contaminants that spoil injera. give injera its typical texture. bake injera with low temperature. increase the shelf life of injera. 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!