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Random biology questions before the exam

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JL_91:
My teacher said that that whole bit about C3, C4 and CAM plants has been removed from the syllabus, so all I'm going to do is have a brief read over it (just in case!).

The Calvin Cycle basically IS the light-independent stage of photosynthesis..I think! (Correct me if I'm wrong). And yes, I think we need to know the whole process in fair detail, but we don't have to memorise every last thing involved. Just the important ones.

Natural killer cells are non-specific, second line of defence cells that will act on any diseased cell; cytotoxic T cells are specific, third line cells that only act, and only on the specific target cell, when presented with an antigen by an MHC marker (an MHC-antigen complex).

...I'm a bit freaked out by the fact that we're getting 9 short answers on the exam this year, as opposed to 6 or 7. Time management is my #1 weakness! Every time I choose a subject, VCAA seems to choose my year to increase the number of questions on the paper for the first time... >:( lol

Mao:

--- Quote from: shinjitsuzx on June 09, 2008, 06:47:08 pm ---how do u know the number of questions ur getting already? if ur basing that off the covers on the vcaa site; theyre not the actual number of marks+questions ur gonna get...it says somewhere in that document

--- End quote ---
the covers-sheets are what you will be getting
you might be confusing yourself with the sample exam [such as for chemistry], which are not.

JL_91:
My bad - it has always been 9 questions, I confused myself from something someone else told me and some paper I saw! And yes, the cover sheet is how you find out how many questions/marks you're getting, I didn't get anything from the sample papers.

shinny:
'Students should note that the number of pages, questions and marks shown for the examination may differ slightly from the number indicated in the actual examination books given to students on the day of the examination.'

straight from the vcaa site. i'm not too sure as to what differ slightly means; but judging from how certain u guys are that it is what we'll be getting, i guess thats just a statement saying don't be surprised IF it does change.

edit: 'SAMPLE Number of questions and mark allocations may vary from the information indicated' is also watermarked onto the cover - but yeh, i assume its just saying it MIGHT change

BA22:

--- Quote from: nancy on June 07, 2008, 08:22:51 pm ---Cytotoxic T-cells are cells that destroy body cells that have been infected by viral particles. Similarly natural killer cells destroy body cells infected with viral particles as well as cancer cells ( cells developing tumors.)
A major differance between cytotoxic T-cells and NK cells is that while cytotoxic t -cells develop a memory response to a particular antigen in the form of T-memory cells, NK cells do not develop a memory response or memory cells.

--- End quote ---

The major difference is that Natrual killer cells are non-specific and T-cells are specific. You need to know this, this distinction is key to understanding the multiple layers and specifc function of the immune system

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