Question

How to explain an experiment result that the rate of respiration of yeast with water is faster than that with starch solution?

Answer 1

If you're talking about a results section, essentially you could say that. "The rate of respiration of yeast with water was found to be faster than that with starch solution" and insert some values of what you found.

Answer 2

hmmm, are you wondering why you got that result?

Answer 3

The most important thing you can do in a conclusion is to refer to data previously used. This will strongly enforce the idea that your conclusion is valid. You also need to use the evidence to support your hypothesis, which will eventually allow you to further explain why your results are true. Conclusions also need to have a sections that explains error in the experiment and one that denotes further testing.

Answer 4

Thanks for the help and sorry for not making the question clear.Probably yeast can respire in water with endogenous substrates but no sugar. I predicted that yeast would respire in starch solution faster than that in water.But now I cannot understand the experiment result. Is the starch solution unfavorable for the respiration?

Answer 5

Hmm that is a bit of a strange result, yeah sorry about that I was kinda tired when I wrote that answer only realised after ManInBlack said something that I probably answered wrong.

So how did you do the experiment? (I would have predicted the same thing, though it has been awhile since I have done this type of stuff).

Answer 6

Ah ha found an answer (I think). "Starch would certainly be the slowest and is unlikely work at all, as it is insoluble and therefore the yeast will be unable to absorb it." http://www.studyzones.com/questionzone/answer/26298x1675/yeast-respiration-and-different-sugars

Answer 7

I mixed yeast and the water(or other sustrate solution)then connect the syringe to a pipette, recorded the displacement level on a pipette which was moved by the release of co2. ... thanks for the reference, may I ask why would the rate of respiration with water faster then, not absorbing starch has nothing to do with endogenous substate.

Answer 8

Well to tell you the truth I don't know, been a little too long since I did it. Hopefully ManInBlack will know the answer. It might be worth re-posting your question as it has sunk a little (I wouldn't normally recommend re-posting as its pretty annoying but for this question it probably just needs a bit more light at the top there)

Answer 9

alright,thx