CH 9 - Metabolic Pathways Flashcards
____________ is the most common fuel in cells
How many CATABOLIC processes harvest the energy from glucose?
Three:
Gylcolysis(aerobic or anaerobic)
Cellular respiration (aerobic)
Fermentation (anaerobic)
True or false: Red Blood Cells utilize glycolysis, aerobic respiration, and fermentation for energy
False: Red Blood Cells lack mitochondria and can only perform glycolysis
Which of the following structures shows ATP? What are the different components?
For a reaction with energy of products > energy of reactions it would be considered _________________(Exergonic/Endergonic)
Endergonic
Anabolic
+G
Requires energy
The final product of a reaction is blocked from being released by which type of inhibitor?
Uncompetitive inhibitor
How do exergonic reactions differ from endergonic reactions?
Exergonic = -G, catabolic, products have lower energy (more stable) than reactants, energy released can be used by the system to do work, can be used to drive anabolic reactions
Endergonic = +G, anabolic, products have more energy (less stable) than reactants, require input of energy
What is the NET number of ATP/NADH/Pyruvate produced by substrate level phosphorylation during glycolysis?
2 ATP
2 NADH
2 Pyruvate
Which enzyme splits the hexose (1,6-FBP) into DHAP and G3P?
Adolase
Which type of enzyme adds a phosphate group?
Kinase
Ex: Hexokinase (Glucose to G6P)
Which type of enzyme changes the structure of DHAP and G3P?
Isomerase
Which product of fermentation has 2 Carbons? 3 Carbons?
2 C = Ethanol
3 C = Lactic Acid
The thylakoid membrane and stroma are analogous to the _____________ and ____________ in the mitochondria?
Intermembrane space = thylakoid membrane (High H+)
Matrix = stroma (low H+)
Which type of enzyme takes hydrogen (e-) from G3P and transfers to NAD+?
Triose phosphate dehydrogenase
Which enzyme converts Phosphoenolpyruvate to pyruvate during the final step of glycolysis?
Pyruvate kinase
How many molecules of CO2, NADH, FADH, ATP are produced PER (1) molecule of pyruvate during the Kreb’s cycle?
2 CO2 (+1 from glycolysis)=3 total
3 NADH (+1 from glycolysis) = 4 total
1 FADH
1 ATP
Which type of enzyme is utilized in the electron transport chain for oxidative phosphorylation?
Reductase
What is the final electron acceptor in oxidative phosphorylation?
O2 -> H2O
Which subunit of the ATP synthase faces the intermembrane space? Mitochondrial matrix?
F0 (lollipop) = intermembrane space
F1 = matrix
What is the electron acceptor in fermentation?
Pyruvate
How many CO2 are produced during fermentation?
2 CO2
Which type of enzyme adds a H+ to lactate anion- to form lactic acid?
Lactate dehydrogenase adds H to NAD+ to form NADH and lactic acid
Which molecule has the lowest free energy?
H2O if compared to molecules with CnH2n
How would you reduce the likelihood that a competitive inhibitor will bind to the active site?
Increase the concentration of substrate
What molecule donates the electrons in photosynthesis?
H2O
