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    I have some mocks coming up this week and more near the end of May or June for my AS levels to help me get into the second year of Sixth Form. The teachers are emphasising the importance of doing Past Papers and looking at the mark scheme as a good way to revise, but for me it doesn't seem to be working at all. I attempt to do a test, get bored, mark it, and never look at it again or learn anything from them. I was wondering if anybody knew of any good Youtube channels that I could watch in order to help me revise and for the information to get into and stay in my head. Or if there are any other revision techniques that anyone has that may be useful for me, as I really want to try some new ways to revise. All that I am currently doing is writing up my notes or creating very detailed Spider Diagrams on word and printing them off as posters. Anything suggested would be really appreciated.

    P.S. If anybody has any common questions with model answers that I could revise please let me know, as I would probably benefit from learning model answers as well. Thank you!
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    Apparently your approach to biology could be improved in common with the vast majority of biology students, especially those doing A level biology - try to look at biology as a supremely clever and very rational solution that nature has engineered to enable life, NOT a thick BOOK TO MEMORIZE!

    A. All activities that take place in animals [particularly mammals] does so for a reason, ranging from the need for exchange of substances efficiently as organisms became larger leading to complex circulatory and ventilatory systems with immense surface areas to, at the molecular level, the sheer ingenuity of the triplet code, the structure of DNA, its transcription into mRNA, the carrying of specific amino acids by tRNA to the 30S subunit (in prokaryotes) of the ribosome, the natural progression of the nascent polypeptide chain on to the Golgi body, for the next step e.g. formation of a glycoprotein.

    Try to ask the SIX WISE MEN: How, where, when, which, what, and why and make sure you pinpointthe reason for any fact:

    - Q. Why are the exopeptidases found lower down in the alimentary tract than the endopeptidases? A. It is more efficient to break a long chain of amino acids into smaller chains first with endopeptidases (ENDO = inside), so that there are more "ENDS" for the exopeptidases (EXO = outside) to then work.

    - Q. Why are there cartilage rings around the bronchi/larger bronchioles? A. So that the bronchioles do not collapse due to the negative pressure created by inspiration (breathing in).


    - Q. Why does the oxyhaemoglobin dissociation curve have a sigmoid shape? A. To allow maximum pickup of O2 in the lungs where O2 conc-n is high and maximum release of O2 in the metabolising tissues where it is needed.

    etc etc

    B. Technical words:-

    Find out the Greek origins of words - names in biology were given for a reason:-


    Cyto = cell ----> leuco = white; leucocyte is a white blood cell
    Erythema = red rash; erythrocyte = red blood cell
    Hepato = of liver; mega = large; hepatomegaly = enlarged liver as in malaria.
    Hyper = high; glyc = glucose/sugar; hyperglycaemia = high blood glucose as occurs in diabetes.
    ------------------tension = force/pressure; hypertension = high blood pressure


    Arthropoda: arthro - joint [as in arthritis [itis = inflammation]]; pod/pedo = legs - this group of animals have jointed legs [you must have noticed the bulges on the legs of insects and crabs, etc. THEN divided into Insects, Crustaceans, Arachnids, Molluscs. (arachnids = spiders [from "spinner" of web] - name arachnid originates from the godess of spinning, Arachne.

    C. Use asociation, cross-linking, cross-referencing to aid memory [see my numerous posts on biology learning tips].

    Hope this gives you a headstart - if you have any specific problems tag me or PM me.

    M (specialist biology tutor)
 
 
 
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