Exam Discussion

[spherelin]

Yeah passive immunity will last for a few months or weeks only.
I found that the SA is easier than SB because I might be unlucky and had a pedantic marker.
I would also pick the phagocyte one because natural killer cells just seem weird somehow and they don't attack free bacteria, just infected cells while macrophages(type of phagocyte) can engulf bacteria and foreign material.

LAME, but i swear that the baby can still get breast fed.. and if the mum was infected with that shyat, the antibodies in her body would pass through NO!!! i've already gotten 2 mc questions wrong T____________T and like 2 in the SA. GARRRRRRRRRR

[InsaneMcFries]

The baby can get IgG from the mother. It was all correct, until it assumed that the baby WOULD have 2 years of passive immunity. The baby isn't guaranteed to be breastfed for that time.

[MisterTransistor]

The IgM question - the fact that IgM was found in the baby means that the baby HAS to have had some degree of immune system development, otherwise where else would IgM have come from? Cant come from mother, IgM doesn't cross placenta.

According to Wikipedia, IgM antibodies can develop in the fetus at 20 weeks and onwards
http://en.wikipedia.org/wiki/Immunoglobulin_M#cite_note-4

[InsaneMcFries]

Exactly, the baby made them, not the mother.

[spherelin]

Exactly, the baby made them, not the mother.

wtf lame, srsly -.- they can't expect us to know that shit. oh well. IT JUST HURTS TO KNOW I COLOURED D AND RUBBED IT OUT LAST MINUTE

[Russ]

You can rule out the first three options as definitely being wrong, D is the only one left that's plausible

[MisterTransistor]

wtf lame, srsly -.- they can't expect us to know that shit. oh well. IT JUST HURTS TO KNOW I COLOURED D AND RUBBED IT OUT LAST MINUTE

I doubt many people new this-I for one didn't. But I'm guessing that this is one of those questions you just have to logically solve by elimination of the other possible answers. It came down to B and D and so you would have to apply the knowledge that passive immunity is short lived to eliminate B.

[saheh]

It said that the babies were tested before being breast fed for the first time

[InsaneMcFries]

Yeah, a lot of biology past exams I found were just elimination in MC.

Correct saheh. The information was all correct. However, the actual answer B was wrong.

[spherelin]

It said that the babies were tested before being breast fed for the first time

lol omg i swear i am blind. but okay guys~~~~~

[nonimous]

Hey I have a quick question. In mc do you guys remember the question where it shows ADP becoming ATP and it asks what the original source of energy for the reaction was? What did you guys put, because I wasn't sure about if it was glucose or sunlight?

[vagrantshades]

Hey I have a quick question. In mc do you guys remember the question where it shows ADP becoming ATP and it asks what the original source of energy for the reaction was? What did you guys put, because I wasn't sure about if it was glucose or sunlight?

Sunlight. It asked for the ORIGINAL souce of energy, which is ultimately sunlight, because glucose is built by harnessing the energy of sunlight.

[spherelin]

Hey I have a quick question. In mc do you guys remember the question where it shows ADP becoming ATP and it asks what the original source of energy for the reaction was? What did you guys put, because I wasn't sure about if it was glucose or sunlight?

i said sunlight bro, i learnt that in unit 2 and that's the only thing that stuck with me since 1/2 bio HAHAHAHA

[scbrother]

what did everyone do for the blood agglutination Q!?!?!? I did D where A or B is added to AB, because i thought it would be B or C where A is added to B visa versa but i couldn't circle both!

[scbrother]

Couldnt have the original energy been created from those ocean bacteria organism things that make their own food without light? BAM VCAA!