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Problem with Grade 12 Biology

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mienusmotion  
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Committed in Dec 2006
I'm in mississauga
ontario
Addiction Index™: 143
Oct 25, 2010  4:12 PM 1

I'm mienusmotions daughter, and I am doing an assignment about cellular respiration. I do not understand the assignment and I would appreciate the help. The question is:

Imagine that an extratraterrestrial life-form has been recovered from a meteorite by a deep space probe that has a ravenous appetite for sand. Your job is to come up with a preliminary analysis of its bioenergetic pathway. On close examination you note that the alien has a basic cellular structure similar to that of Earth-based creatures. It has what you would consider to be a cytoplasm, nucleus, ad other basic organelles. In addition, the creature appears to be capable of using oxygen in the course of its metabolism. Following a rigorous biochemical analysis, you have the following points:

a. A glycoloysis-like process begins with the alien's basic food stuff of sand particles. Specifically, the first molecule in the pathway contains 256 silicon atoms (Si256)

b. In the process of metabolizing the Si256, you note that the creature uses up 50 energy-carrying molecules that you have named ZTP (since it is an unknown triphosphate-bearing molecule that gives the creature 'zip') in converting the Si256 into 4 molecules of Si64. Also, in the process of breaking down one molecule of Si256, ten molecules of an electron-carrying substance you have called EADH are formed.

c. Each Si64 molecule is broken down into two colecules with the creation of 5 ZTP molecules and 4 EADH molecules. Each molecule of Si64 gives off four SiO2 molecules in this step (Si30 molecules left).

d.Each Si30 goes trough a cyclic process in an organelle similar in structure to our own mitochondrion in which the Si30 is completely oxidized to SiO2/ In this process, 8 ZTP, 4 EADH, and 7 EADH2 are released.

e. Each molecule of EADH is converted to 10 ZTP, and each molecule of EADH2 is converted to 5 ZTP. (NOTE: Each EADH formed in step (b) is converted to two molecules of EADH2 when it passes into the mitochondrion-like structure)

How many ZTP and SiO2 molecules will be formed in the conplete metabolism of 1 molecule of Si256?

mienusmotion
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