1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Yeast cells vs. corn seedling

  1. Feb 25, 2008 #1
    1) Will yeast cells or corn seedling have a higher metabolic rate when compared on a mass specific basis?

    2) How will decreasing the amount of glucose affect the rate of ATP production by the cells if the amount of yeast is held constant?

    Answer: the rate of ATP production will decrease until all of the glucose available for glycolysis is used up. At this point the ATP production will become zero because no more glucose is available. (is this the correct answer?)
  2. jcsd
  3. Feb 26, 2008 #2

    jim mcnamara

    User Avatar

    Staff: Mentor

    How do you measure metabolic rate? One way is to measure [tex]CO_2[/tex] production.

    So, the question is asking how are these two different with regard to CO2 production?
    (remember - the question is on a mass specific basis, so you count the mass of leaves)
    What do leaves do with [tex]CO_2[/tex] - that yeast cells do not do?
  4. Feb 26, 2008 #3

    jim mcnamara

    User Avatar

    Staff: Mentor

    #2 deals with the amount of glucose each yeast cell can get a hold of to metabolize into ATP.

    This is because the number of yeast cells (say 100) stays the same, but the glucose concentration goes down. Each yeast cell has less glucose to use, less glucose=less ATP.
  5. Feb 26, 2008 #4


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I think the metabolism is better measured by the rate of sugar or starch usage in this case. If I interpret the meaning of 'mass-specific' activity based on mass of organism, the answer is likely straightforward. What percent of the mass of the corn seedling is actually growing vs that of the yeast cell? Does the corn seedling include the monocot?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Yeast cells vs. corn seedling
  1. Electrochemical Cell (Replies: 1)

  2. Cell Potentials (Replies: 1)