ETEA PAST PAPER 2020 ETEA 2020 ( PART 16 ) 1. Monosaccharides have a general formula represented by Cn(H2O)n C(H2O)n C2(H2O)n C2(H2O)n 2. NAD is an example of Dinucleotide Tri nucleotide Mononucleotide Tetra cucleotide 3. Lock and key model of enzyme action proposed by Emil Fischer suggested that Enzymes are unbiased for the substrate Enzymes are restricted to one reaction type An enzyme can catalyze variety of reactions Enzymes are restricted to one reaction type 4. Most enzymes have and optimum temperature of around 30 C 20 C 50 C 40 C (close to exact range i.e 36.1 to 37.8) 5. Enzymes work by lowering the ___ of the reactions that catalyze Heat energy Activation energy Kinetic energy Potential energy 6. First stable compound during calvin cycle is Glyceraldehyde 3-phosphate 1,3 bisphosphoglycerate Ribulose bisphosphate 3-phosphoglycerate 7. What is the function of ribulose? Respirator fuel Intermediate in cellular respiration Intermediate in photosynthesis Component of DNA and RNA 8. Which of the following processes does not need pyruvic acid as a substrate? Alcohol dermentation Aerobic respiration Calvin cycle Lactic acid dermentation 9. Which of the following is a copper containing protein in the electron transport chain? Plastoquinone Ferrodoxin Cytochrome-C Plastocyanin 10. In electron transport chain, ATP synthesis takes place when electron moves from Primary electron acceptor (PEA) to plastoquinone Cytochromes to plastocyanin Plastoquinone (Pq) to cytochromes Plastocyanin (Pc) to photosystem 1 (PS-I) Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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