QUESTION 7 In experiment 2, what was the purpose of the beakers with no beans at
ID: 50342 • Letter: Q
Question
QUESTION 7
In experiment 2, what was the purpose of the beakers with no beans at all?
as a negative control to test for the effect of air alone
as a postiive control to test for the effect of air alone
to test the actual color of the bromothymol solution when beans weren't in the way of the observation
this beaker was not really necessary in this experiment
10 points
QUESTION 8
What was the final color of the beaker with the dry kidney beans and why?
green, because the respiration rate was low
green, because the beans were not carrying out photosynthesis
yellow, because the beans were respiring
green, because the beans were dormant and not carrying out respiration
10 points
QUESTION 9
What is the advantage of cellular respiration over fermentation?
it is less toxic
it occurs more quickly
it is a less complex process with fewer steps
it produces more ATP per molecule of glucose
10 points
QUESTION 10
During which of the phases of cellular respiration is the majority of ATP formed?
electron transport chain/chemiosmosis
glycolysis
prepartory reaction
citric acid cycle
as a negative control to test for the effect of air alone
as a postiive control to test for the effect of air alone
to test the actual color of the bromothymol solution when beans weren't in the way of the observation
this beaker was not really necessary in this experiment
Experiment 1: Fermentation by Yeast Yeast cells produce ethanol and CO2 during fermentation. We will measure the production of CO, to determine the rate of anaerobic respiration in the presence of d ifferent carbohydrates. Note: Sucrase (a disaccharide) is made up of glucose and fructose. Glucose is a monasaccharide. 100 mL Graduated cylinder Warm water Pipettes Watch or timer Permanent marker Ruler Measuring spoon You must provide Materials S Respirometers (Figure 2) 1% Gluco solution 1% Sucrose solution Equal ,Splenda ,and sugar packets 1 Yeast packet 4 250 mL Beakers Figure 2 To make a respirometer, obtain two test tubes that fit into each other- one small plastic test tube and one large glass test tube for each respirometer. 8: Respiration Procedure 1. Completely fill the smallest tube with water and inwert the larger tube over it. Push the small tube up (into the larger tube) until the top connects with the bottom of the inverted tube. In vert the respirometer so that the larger tube is upright (there should be a small bubble at the top of the internal tube). Repeat this several times as practice-strive for the smallest bubble possible. When you feel comfortable with this technique, empty the test tube and continue with this experiment 2. water in a 250 mL beaker. Stir until dis- Mix 1/4 tsp. of yeast into 175 mL of warm (4043 solved Note: Make sure the yeast solution is stirred before each test tube is filled.Explanation / Answer
Q 7. As a negative control to test for the effect of air alone.
Generally A negative control group gives no observable changes. So, it will be compared to the positive control or test grous to determine the observable experimental changes.
Q. 8. Green, because the respiration rate was low
If photosynthesis has occurred, the solution might have turned yellow.
Q 9. it produces more ATP per molecule of glucose
Cellular respiration-------> 36 to 38 ATP per cycle
Fermentation -------> Only 2 ATP per cycle.
Q 10. electron transport chain/chemiosmosis
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