A couple years ago on the geometry exam, there was a question that NYSED just gave everyone credit for and deleted from the online records … don’t know what happened there. Anyways, its not unheard of, but rarely happens.
It was active transport because the vacuole has to physically move to pump the water out and has to use ATP to maintain a lower concentration of water inside the cell than outside of it.
@k_atherine.h i guess it’s possible, but they almost never do it. This was a tough exam to score perfectly, but overall was not too bad.
I got 3 multiple choice wrong so far >.<
I actually felt that I did better today than any of my practice exams.
I have 2 wrong so far, and I’m hoping to keep it to 4 or less wrong so i end up w/ a 95. Anything below a 90 will surprise me
It was 99% because the wight of cell rose from 55g to 60g, indicating that water went into the cell (so there had to be a higher concentration outside for it to diffuse).
So far, it’s possible I still have an 100, hoping the Pennsylvania question is 4, the paramecium is active transport, and they accept my rather vague answer for the role of mutation question.
oh I picked 99% but there was another question similar to that
I did a lot of practice tests (like 4) and scored 97 on all but the fourth (got a 100). My response for the twig one was very questionable, so I think I will get a 98.
Amoeba makes use of contractile vacuoles to collect excretory wastes, such as ammonia, from the intracellular fluid by diffusion and active transport. As osmotic action pushes water from the environment into the cytoplasm, the vacuole moves to the surface and disposes the contents into the environment. -Wikipedia
Obviously not the most reliable source, but I can understand this the most
@kimclan1 I see that, but let’s assume the other % that isn’t water is glucose. if it’s 5% glucose on the outside, and 3% on the inside, wouldn’t the glucose diffuse across?
Still doesn’t make much sense, I can’t determine the answer
I am not sure if I put active or passive thats the only thing lol
which question number was it
and I remember putting active transport on one of the questions, just dont remember if it was this one? was this the only one with active in it
100% water would be pure H20, nothing else. The minerals and natural things count for other parts if I’m not mistaken
@J1234567890 I don’t believe the question mentioned glucose, actually. I think it just said “water solution.” That is confusing though, I imagined the 3% to be some large molecule like salt.
So if the solution in the tube was 97% water, and lets say it’s glucose, so 3% glucose, and outside is 95% water and 5% glucose, the glucose would diffuse into the tube, thus increasing the mass. If any1 sees a flaw (besides the fact they didn’t indicate what it was) pls tell me i’m so confused
oh well what happened, happened, I freaking hate the curve so badly, I hope they change it to include either two 97’s or a 99!!! Highly doubt it though, but maybe after reviewing that there were a diverse amount of answers, maybe they will give us the benefit of the doubt