A. Which molecule is secreted by an E.coli cell and may have useful activity beyond the outer membrane?
a. Peptidoglycan b. Nitrate c. Beta-Galactosidase
B. In E. coli metabolism, what is taken up from the environment and used as an electron source during respiration?
a. Nitrate b. Water c. Oxygen d. Organic Carbon
C. How many carbon atoms long would a fatty acid have to be to cause as many completions of the TCA cycle as occur from catabolism of one glucose molecule?
~~~~~~~~ANSWER SHOULD BE IN NUMERICAL FORMAT (e.c. 67)~~~~~
Please Note: I have already pondered the guess of 67 for this answer, but my teacher remains to tell me it's incorrect and to rethink it again**
D. Which pathway(s) are most likely active in a growing E. coli population in the large intestine? Choose all that apply.
**I have already met with my teacher to see if my initial guess of both {}Embden-Mayerhoff Pathway & {}Fermentation, but says to rethink and try again....**
To measure the size of gas bubbles in a fermentation tube
To examine yeast cells
To measure the rate of fermentation under several different reaction conditions
Question 2
Yeats are ________________ and have have both a _______________ and _____________.
fungi | cell wall | extra cellular matrix
fungi | cell membrane | cell wall
fungi | cell wall | chloroplasts
animals | cell wall | chloroplasts
Question 3
In which cell organelle of the yeast cell do the many of the reactions of cellular respiration take place?
vacuole
ribosome
nucleus
mitochonrion
Question 4
What gas forms the bubble in the fermentation tube?
carbon dioxide
sucrose
air
oxygen
Question 5
Yeast perform fermentation when oxygen is absent.
True
False
Question 6
When you design your own experiment, which of the following variables will you NOT modify as an independent variable?
sucrose concentration
temperature
yeast cell concentration
pH
oxygen concentration
Question 7
Over what time period will you measure the size of the gas bubble in the fermentation tube?
5min
20min
as long as you decide.
10min
Question 8
What substrate are the yeast cells using for BOTH cellular respiration and fermentation?
carbon dioxide
ethanol
sucrose
mitochondria
Question 9
Which of the following is a product of fermentation in yeast cells?
mitochondria
sucrose
ethanol
oxygen
Question 10
Where in the yeast cell is carbon dioxide produced from fermentation?
inner matrix of mitochondria
mitochondria
nucleus
cytoplasm
Question 11
Bonus: you'll need to look this up.....first find in the lab manual what macromolecule is abundant in the cell wall of yeast cells. Then look up which very different group of organism also has this macromolecule in their exoskeletons. For an answer I'm looking for the name of that group of organism. Write ONE word as your answer in its plural. That word must have 7 letters. Use no punctuation in your answer ONLY the 7 letters in the word.
