Question

the following questions Fructose-1.6- Fructose-6 ADP phosphate phosphate ATP ADP diphosphate Glucose-6 F ATP Glucose-→ Glucose-p)→ Fructose-P P-Fructose-(P FIGURE 5.7 glyceraldyde 3-phosphate P) ADP H-C-OH H20-P 1,3 diphospho- glycerate CH20-P 3 phospho glycerate phosphoenol pyruvate 15) Which step in Figure 5.7 shows a split of one molecule into two smaller molecules? 15) 4) 2 B) 4 )6 Dy H E) 5 16) Which step in Figure 5.7 shows a reaction involving a dehydrogenase? D) 8 A) 2 C) 6 E)5 17) Which step in Figure 5.7 shows substrate level phosphorylation? A) 1 B) 3 08 D) 7 E) none of the above 18) Which step in Figure 5.7 shows chemiosmosis? B) 2 C) 8 D) 7 E) none of the above

Answer 1

15. One molecule of fructose 1,6 diphosphate by the action of the enzyme aldolase is converted into two small molecules of glyceraldehyde 3-phosphate. So, the correct option is option D, step 8.
16. The conversion of glyceraldehyde 3-phosphate to 1,3 diphosphoglycerate is catalyzed by the enzyme glyceraldehyde 3-phosphate dehydrogenase. So, the correct option is option B, step 4.
17. If a phosphate group is transferred directly to ADP or GDP from a phosphorylated compound to form ATP or GTP, the reaction is termed as substrate level phosphorylation. The formation of ATP during the conversion of phosphoenolpyruvate to pyruvate is a substrate level phosphorylation step. So, the correct option is option D, step 7.
18. If ions move across a semi-permeable membrane down their concentration gradient then that process is termed as chemiosmosis. Example of chemiosmosis is the generation of ATP due to the movement of hydrogen ions across the semi-permeable membrane during electron transport chain of during the process of photosynthesis. The given figure has no step of chemiosmosis. So, the correct option is option E, none of the above.