Question

Q1: Why does glucose have energy? (Include the concept of oxidation in your answer)Q2: Contrast the combustion of glucose in a flame to harvesting the energy from glucose in a biological cell. What key differences are there?Q3: Draw out the complete cycle of glycolysis and showing all intermediates. (Use line angle drawings)Q4: What does a kinase enzyme do?Q5: Draw out the steps of the citric acid cycle.Q6: What does the enzyme succinic dehydrogenase do?Q7: What is the end fate of the carbon atoms which enter the citric acid cycle? (Where do they go?)Q8: What is ATP and why does it have stored chemical energy? What important polymer will you find adenosine monophosphate in (take note of what is attached to carbon #2)Q9: The average person uses about 120 grams of glucose daily to power their brain (you might be using more during biochem though). The molar mass of glucose is about 180 grams per mole, so this translates to about 0.6 moles of glucose. How many times does the citric acid cycle go around to fuel your brain if all of this glucose is process through the citric acid cycle. Show your work. Recall that one mole is 6.022 x 10^23 molecules.

Answer 1

1. Energy in chemical compounds is primarily stored in chemical bonds, therefore for glucose it will not be different, glucose has energy stored in its Carbon-carbon and carbon-hydrogen bonds, when these bonds are broken, energy is released. Another argument that includes the oxidation concept, is that when glucose is oxidized in the body, as part of the metabolism, glucose will produce CO2, H2O and nitrogen compounds, from this process, energy is released and used by the cell.