perhaps you need to consider the 'scope' of your work and what is expected of you..
the thing about the exams is that if it is new or more complex than the markers level of understanding you maybe disadvantaged... even in university this happens..
im not saying its bad to learn more but it does question if u saw the 40 page slide for 2nd yr immunology just explaining complement... you would think it was overkill for the HSC and useless (countless novel genes.. that are not therapeutic yet)..
remember to see the learning objectives and learn to summerise and understand ... this will be a good skill for academic life in general...
[rote learning can be good until they find out a model is wrong.. it happens countless times and also makes u a crap researcher...
]
also about the structure; are u talkin about hte F
ab and the F
c parts??? because u can... but im not sure its in the HSC tho..
summary: see wat are important points and consequences... see what it is worth.. manage your exam timing..
and save the learning every single point mutation on the genome for the books or till ure about 27 yrs old with a PhD in Immunology under ure belt.