Plant vacuoles must also maintain an optimum pH for its acid hydrolases. True False
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Plant vacuoles must also maintain an optimum pH for its acid hydrolases.
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False
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- With the aid of suitable diagram, discuss negative feedback by allosteric inhibition of the end-product. Give an example of this inhibition in glycolysis and explain the process.Table 9.2 shows that Go’ for the aldolase reaction is large, and positive, yet the reaction proceeds in the forward direction. Using the metabolite concentrations in table 9.3, calculate the actual G in the cell for the reaction to show that it is consistent with the value reported in table 9.2. Explain in words the strategy the cell uses to keep glycolysis moving in the forward direction (1-2 sentences).explain the results effect of temperature and pH on amylase activity Table 1 Effect of Temperature on the Hydrolysis of Starch Time (minutes) 15 °C 37 °C 65 °C 0 2 4 5 8 10 >3 >3 >3 >3 >3 >3 >3 >3 1.831 0.642 0.993 0.300 >3 >3 >3 >3 >3 >3 Table 2 Effect of Ph on the Hydrolysis of S trach Time (minutes) 3.0 7.0 11.0 0 2 4 5 8 10 >3 >3 >3 >3 >3 >3 >3 >3 >3 1.930 1.070 0.747 >3 >3 >3 >3 >3 >3
- For every three moleculos of sugar glucose which are cocidized, provide the number of the following intermediates which are produoed or consumed. Intermediate Molecules formed NAD ADP Fructose 6-phosphate Glyceraldehyde 3-phosphate (GAP)Which of the following is NOT produced during the oxidative phase of the pentose phosphate shunt? a Ribulose-5-Phosphate b Glyceraldehyde-3-phosphate c CO2 d NADPHWhich of the following cellular concentrations would be likely to increase the rate of glycolysis? Low AMP levels High glucagon levels ✓Low fructose-2,6-bisphosphate levels High AMP levels High phosphoenolpyruvate levels Low ATP levels
- Beer production requires an early period of rapid aerobic metabolismof glucose by yeast. Given that anaerobic conditions are necessary toproduce alcohol, can you explain why this step is necessary?provide glycolysis pathway for myristatefull oxidation of 2 moles of glucose produce 36ATP O 72ATP 48ATP O 106ATP O
- Which among the following catalyse dehydration step in the TCA cycle Isocitrate dehydrogenase Enolase Fumarase Succinyl thiokinaseThe proton-motive force drives the rotation of the Y subunit of ATP synthase. This creates conformational changes in the active sites of ATP synthase that accelerate the rate of bond formation between ADP and P, through the stabilization of a tetrahedral intermediate. True FalseIn glycolysis, the KM value of hexoquinase is 0.04 mM. At physiological conditions, the cellular concentration of glucose is between 4 mM to 15 mM. According with this information, which of the following statements is true (Choose all that are correct) The enzyme has a low affinity for its substrate The enzme is working at its maximum velocity The phosphorilation of glucose is very slow The small value of KM assures that glycolysis will continue even when the concentration of glucose drops below 4 mM. The hexoquinase is saturated with glucose
