BioChemistry > EXAM > Biochemistry exam | topic wise correctly answered questions | 20 pages (All)

Biochemistry exam | topic wise correctly answered questions | 20 pages

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1. Which enzyme is considered [REDACTED]? Rate limiting: Of glycolysis: phosphofructokinase Of TCA: isocitrate dehydrogenase Part of TCA and ETC: Succinate Dehydrogenase also known as FADH2 ubiqu... inone oxidoreductase Inhibitory: 2. A solution at pH [REDACTED] contains a weak acid, HA. The pKa of the acid is [REDACTED]. What is the ratio of [A - ]:[HA]? Henderson Hasselbach: pH=pKa+log[A-/HA] [A-/HA] = 10^(pH-pKa) For example: A solution at pH [7] contains a weak acid, HA. The pKa of the acid is [6.5]. What is the ratio of [A]: [HA]? For a weak acid HA in equilibrium with its conjugate base AHA <=> H+ + AUse the Henderson-Hasselbach equation pH = pKa + log ([A- ]/[HA]) 7 = 6.5 + log ([A- ]/[HA]) 0.5 = log ([A- ]/[HA]) [A- ]/[HA] = 100.5 = 3.16 So the ratio of [A- ]: [HA] is 3.16: 1 3. In mitochondria, what is the expected [REDACTED]? Pathway: not glycolysis, but TCA and ETC. pH: relation of structures to each other. PH of intermembrane space compared to matrix- more acidic PH of matrix compared to intermembrane space- more basic 4. When Compound C [REDACTED] electrons to Compound D, then Compound D [REDACTED] _____ and Compound C [REDACTED] _____. When Compound C donates electrons to Compound D, then Compound D is reduced and is an oxidant, and Compound C is oxidized and is a reductant. (for example). Donates/ reduced or oxidant/ oxidized or reductant. 5. When Compound C [REDACTED] electrons from Compound D; Compound D [REDACTED] _____ and Compound C [REDACTED] _____. [Show More]

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