A+ Cut Off Prediction for 2011 VCAA Biology Exam 1

[jane1234]

Why did the graph line in the last question go horizontal!?!?

I wrote that the reaction reached maximum efficiency =l

yeah that's it I think, I wrote that the enzymes used in the reaction were saturated + some more BS I forgot ROFL.

Thought it was because CO2 became a limiting factor...

[Truck]

Why did the graph line in the last question go horizontal!?!?

I wrote that the reaction reached maximum efficiency =l

yeah that's it I think, I wrote that the enzymes used in the reaction were saturated + some more BS I forgot ROFL.

Thought it was because CO2 became a limiting factor...

O crap, yeah that's probably it, and I can't remember if I had that in my response cause I had some other point in there. I think you're right... but I think it could be both?

[stonecold]

Why did the graph line in the last question go horizontal!?!?

I wrote that the reaction reached maximum efficiency =l

yeah that's it I think, I wrote that the enzymes used in the reaction were saturated + some more BS I forgot ROFL.

Thought it was because CO2 became a limiting factor...

That could be it.

I thought that the photosynthetic enzymes/ mechanisms became saturated at that point, and the chloroplasts were producing ATP/glucose at maximum efficiency.

[Charmz]

It is because CO2 is a limiting factor. You're right.

[The Full House]

Actually now that I think about it you're probably right... CO2 = limiting factor. Damnit! I was gonna write that down but I wasn't sure =l But wouldn't it be the same thing? If youre using maximum CO2 then its maximum efficiency? o.O am i going crazy?

[The Full House]

Oh gosh... I'm glad I got 25/25 for mc, coz I really fell down on the short answer questions...

[Charmz]

I couldn't think of the words limiting factor so i wrote down something that means the same thing. Hopefully VCAA get the gist (when i say that I hope they give me the mark even if i didn't use the biological terminology)

[amun]

the exam was different then i had expected  overall i did not finish and did really bad mistakes .

[ezye21]

zzz what if you said that there were other limiting factors such as temperature and the amount of enzymes available to undergo photosynthesis which caused the graph to platue

[stonecold]

There will be numerous answers as to why the graph flattened out.

Acceptable ones will include:
-CO2/H2O availability became a limiting factor
-CO2 could not be taken up any faster.  i.e. surface area
-Photosynthetic enzymes/pigments became saturated

Temperature/wavelength of light is not acceptable because this was kept constant.

[ezye21]

answer to question 21 for multi choice ?

[stonecold]

answer to question 21 for multi choice ?

C is the best answer, but overall I think it is a relatively dodgy question.

[ezye21]

mmm i put B   dam guess that 23/25 -.- nooooooo

[stonecold]

mmm i put B   dam guess that 23/25 -.- nooooooo

If it makes you feel better, I got 23/25 on MC for the 2010 mid year. 

Don't lose hope, you can still do very well. 

[jane1234]

mmm i put B   dam guess that 23/25 -.- nooooooo

If it makes you feel better, I got 23/25 on MC for the 2010 mid year. 

Don't lose hope, you can still do very well. 

Just curious, what score did you get overall?