T#2 lab questions Flashcards
How will we measure activity of pyruvate dehydrogenase and the Krebs cycle in this week’s lab?
A.By measuring the volume of CO2 gas released by yeast.
B.By measuring the rate at which O2 is consumed by fish, snails and Elodea using an oxygen electrode.
C.By using titration with NaOH to measure the amount of CO2 produced by fish, snails and Elodea.
D.By using a pH meter to measure the change in acidity of the water that fish, snails and Elodea are living in.
E.By measuring the rate at which fish, snails and Elodea change the color of the water they are living in.
C.By using titration with NaOH to measure the amount of CO2 produced by fish, snails and Elodea.
The queen of England farted at Wimbledon. Attempting to blame it on the butler she said “stop that James!” James replied “very well Madam, but which way did it go?”
Please help James, which way did it go?
A.Upwind B.Towards the highest concentration of humans C.Up its concentration gradient D. Down its concentration gradient E. Away from all humans
D. Down its concentration gradient
How will we study glycolysis in this week’s lab?
A.By measuring CO2 released by fish
B.By measuring oxygen consumption by mitochondria
C.With a pH meter
D.By measuring fermentation by yeast
E.By measuring the change in glucose concentration of the media bacteria are growing in.
D.By measuring fermentation by yeast
What is the structure indicated by C (a blob on the outside of the lipid membrane on the inner part?
A.Transmembrane protein B.Peripheral protein C.Phospholipid D.Carbohydrate E.Cholesterol
B.Peripheral protein
Cells treated with inhibitors of the Na-K pump, Na ionophores or inhibitors of ATP synthesis can’t import ribose into their cytoplasm. How do they import ribose?
A.Receptor-mediated endocytosis. B.Facilitated diffusion. C.Channels D.Antiport with sodium E.Symport with sodium
E.Symport with sodium
How will we measure electron transport in this week’s lab?
A.With a Warburg respirometer.
B.By measuring the reduction of DCIP.
C.By measuring the volume of CO2 gas released by yeast.
D.With a pH meter.
E.By measuring the amount of weight lost by fish after an hour of aerobic exercise.
B.By measuring the reduction of DCIP.
Why do yeast grown anaerobically produce ethanol?
A.To keep millions of thirsty beer-drinkers happy.
B.To kill off bacteria competing with them for the same food sources.
C.To denature the proteins in their food in order to make them easier to digest.
D.To regenerate the NAD+ needed for the oxidation reactions of glycolysis.
E.To regenerate the ATP needed for the reduction reactions of glycolysis.
D.To regenerate the NAD+ needed for the oxidation reactions of glycolysis.
According to the second law of thermodynamics, which of the following is true?
A.Energy conversions increase the order in the universe.
B.The total amount of energy in the universe is constant.
C.The ordering of one system depends on the disordering of another.
D.The entropy of the universe is constantly decreasing.
All reactions produce some heat.
C.The ordering of one system depends on the disordering of another.
How can cells control their metabolism?
A. By actively transporting in substrates B. By adding energy to their substrates C. By controlling their enzymes D. By changing their pH E. By controlling their temperature
C. By controlling their enzymes
How will we measure CO2 uptake in this week’s lab?
A.By measuring the change in color of DCIP.
B.By measuring the decrease in CO2 with a CO2 electrode.
C.By measuring the decrease in CO2 with an infra-red gas analyzer.
D.By measuring the change in color of phenol red.
E.By titrating with NaOH to measure the change in CO2 concentration.
D.By measuring the change in color of phenol red.
Why does potassium chloride spontaneously dissolve in water even though this reaction is endothermic?
A.Potassium and chlorine both love water so they will dissolve whether the reaction is endothermic or not.
B.All endothermic reactions occur spontaneously.
C.The increase in entropy is so large that it results in a net decrease in the free energy of the system.
D.The decrease in entropy is so large that it results in a net decrease in the free energy of the system.
E.Substituting weaker hydrogen bonds between the potassium and chloride ions and water for the stronger ionic bonds between potassium and chloride ions lowers the free energy enough for the reaction to proceed.
C.The increase in entropy is so large that it results in a net decrease in the free energy of the system.
How is this biological pathway probably
controlled?
A. Substance 1 is an activator of enzyme 4 B. The product is an activator of enzyme 1 C. Substance 1 is a competitive inhibitor of enzyme 4 D. The product is a competitive inhibitor of enzyme 1 E. The product is a non- competitive inhibitor of enzyme 1
E. The product is a non-
competitive inhibitor of enzyme 1
How will we measure the Hill reaction in this week’s lab?
A.By measuring the change in color of DCIP.
B.By measuring the release of oxygen in response to light.
C.By measuring the change in the absorption spectrum of chlorophyll.
D.By measuring the change in color of phenol red.
E.By measuring the uptake of CO2 by algae.
A.By measuring the change in color of DCIP.
Succinylcholine is almost identical to acetylcholine, but if mixed with the enzyme that hydrolyzes acetylcholine, the enzyme stops working. This suggests that:
A. Succinylcholine is an activator of this enzyme.
B. Succinylcholine is a noncompetitive inhibitor.
C. Succinylcholine is a competitive inhibitor.
D. The Ea for succinylcholine hydrolysis is higher than for acetylcholine hydrolysis.
E. The active site is the wrong shape to bind succinylcholine.
C. Succinylcholine is a competitive inhibitor.
How will we construct the absorption spectrum of photosynthetic pigments in this week’s lab?
A.By measuring the change in DCIP color as we change the light intensity.
B.By measuring the change in phenol red color as we change the wavelengths.
C.By measuring the amount of light absorbed as we change the wavelengths.
D.By separating the individual pigments using TLC.
E.By measuring the amount of CO2 absorbed as we change the light intensity.
C.By measuring the amount of light absorbed as we change the wavelengths.
