ETEA PAST PAPER 2020 ETEA 2020 ( PART 16 ) 1. Monosaccharides have a general formula represented by C2(H2O)n C(H2O)n C2(H2O)n Cn(H2O)n 2. NAD is an example of Mononucleotide Tri nucleotide Tetra cucleotide Dinucleotide 3. Lock and key model of enzyme action proposed by Emil Fischer suggested that Enzymes are restricted to one reaction type Enzymes are restricted to one reaction type Enzymes are unbiased for the substrate An enzyme can catalyze variety of reactions 4. Most enzymes have and optimum temperature of around 40 C (close to exact range i.e 36.1 to 37.8) 50 C 20 C 30 C 5. Enzymes work by lowering the ___ of the reactions that catalyze Heat energy Potential energy Activation energy Kinetic energy 6. First stable compound during calvin cycle is Ribulose bisphosphate Glyceraldehyde 3-phosphate 3-phosphoglycerate 1,3 bisphosphoglycerate 7. What is the function of ribulose? Component of DNA and RNA Respirator fuel Intermediate in cellular respiration Intermediate in photosynthesis 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? Plastocyanin Cytochrome-C Plastoquinone Ferrodoxin 10. In electron transport chain, ATP synthesis takes place when electron moves from Plastocyanin (Pc) to photosystem 1 (PS-I) Plastoquinone (Pq) to cytochromes Primary electron acceptor (PEA) to plastoquinone Cytochromes to plastocyanin 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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