Cell Membranes lab report
BioLab3 Lab Report 7
Cellular Respiration Answer Key
Student Name:
I. The ATP Cycle
Define the following terms:
Autotroph
Heterotroph
Aerobic respiration
Anaerobic respiration
Complete the chart below:
Letter
Defining Term
A
B
C
D
II. Anaerobic Respiration
Define the following terms:
Alcoholic fermentation
EXERCISE 1 – Alcoholic fermentation
At intervals of 20, 40, and 60 minutes, the tubes are removed. Record the volume of gas produced in each fermentation tube. Each tube is graduated in tenths of a milliliter. (HINT: Look at the amount of gas, not the level of the liquid.)
Tube
Solution
Gas Volume in ml after:
20 min.
40 min.
60 min.
1
10% glucose + yeast
2
1% starch + yeast
3
1% starch + yeast + amylase
What gas accumulated in the calibrated portion of the fermentation tube?
What metabolic pathway is utilized by yeast cells?
Why was amylase added to the third test tube?
Did respiration occur in the beaker containing yeast and starch? Why?
III. Aerobic Respiration
Define the following terms:
Glycolysis
Kreb’s or citric acid cycle
Electron transport phosphorylation
A. Carbon Dioxide Production
EXERCISE 2 – Carbon dioxide production in germinating seeds
Record the experimental results below.
Bean Seeds
Indicator color
CO2
+ or -
Germinating
Germ-boiled
Ungerminated
What color is the phenol red solution in the stock bottle?
What does this indicate about the pH of the phenol red solution in the stock bottle?
What color was the solution in the beaker after exhaling into the solution?
Explain the color change.
Which laboratory setup produced carbon dioxide?
B. Oxygen Consumption
EXERCISE 3 – Measuring metabolic rate
Record the time measurement for the soap film to travel 2 ml of the pipette.
Oxygen Consumed (ml)
Time (seconds)
Test 1
2
Test 2
Cellular Respiration Answer Key
Student Name:
I. The ATP Cycle
Define the following terms:
Autotroph
Heterotroph
Aerobic respiration
Anaerobic respiration
Complete the chart below:
Letter
Defining Term
A
B
C
D
II. Anaerobic Respiration
Define the following terms:
Alcoholic fermentation
EXERCISE 1 – Alcoholic fermentation
At intervals of 20, 40, and 60 minutes, the tubes are removed. Record the volume of gas produced in each fermentation tube. Each tube is graduated in tenths of a milliliter. (HINT: Look at the amount of gas, not the level of the liquid.)
Tube
Solution
Gas Volume in ml after:
20 min.
40 min.
60 min.
1
10% glucose + yeast
2
1% starch + yeast
3
1% starch + yeast + amylase
What gas accumulated in the calibrated portion of the fermentation tube?
What metabolic pathway is utilized by yeast cells?
Why was amylase added to the third test tube?
Did respiration occur in the beaker containing yeast and starch? Why?
III. Aerobic Respiration
Define the following terms:
Glycolysis
Kreb’s or citric acid cycle
Electron transport phosphorylation
A. Carbon Dioxide Production
EXERCISE 2 – Carbon dioxide production in germinating seeds
Record the experimental results below.
Bean Seeds
Indicator color
CO2
+ or -
Germinating
Germ-boiled
Ungerminated
What color is the phenol red solution in the stock bottle?
What does this indicate about the pH of the phenol red solution in the stock bottle?
What color was the solution in the beaker after exhaling into the solution?
Explain the color change.
Which laboratory setup produced carbon dioxide?
B. Oxygen Consumption
EXERCISE 3 – Measuring metabolic rate
Record the time measurement for the soap film to travel 2 ml of the pipette.
Oxygen Consumed (ml)
Time (seconds)
Test 1
2
Test 2