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* Biology Higher level 2011 * (one thread please)

1356715

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  • Registered Users, Registered Users 2 Posts: 642 ✭✭✭brownlad


    njd2010 wrote: »
    Anyone know how important specific quantities are in the part Bs? Like would "add hydrogen peroxide" get less marks than say, "add 5cm^3 of Hydrogen peroxide"?

    Also- we didn't do the nitrogen cycle... is it important enough to warrant spending time on it in the morning?

    nah you dont have to know what ml of chemicals your adding:)


  • Registered Users Posts: 261 ✭✭cocopopsxx


    I'm starting to freak out now..I don't have time to do all the systems in one night. I was so stupid to leave biol to last minute but yeah, what should I do?? :(


  • Closed Accounts Posts: 64 ✭✭fleeflyfloflum


    G.J. wrote: »
    Damn, I was always taught that it was a pH of 6-7 for humans and around 8-9 for plants. Sorry about that! >.<


    I am not a LC this year (thankfully) but according to my book 9 is the optimum pH for Catalase...couldn't bare not to contribute.

    Best of luck tomorrow to you all! :)


  • Closed Accounts Posts: 5,734 ✭✭✭J_E


    cocopopsxx wrote: »
    I'm starting to freak out now..I don't have time to do all the systems in one night. I was so stupid to leave biol to last minute but yeah, what should I do?? :(
    You're best going through a revision book (have you got one?)


  • Registered Users Posts: 261 ✭✭cocopopsxx


    Cydoniac wrote: »
    You're best going through a revision book (have you got one?)

    No, I don't even have a revision book. :(
    Can I like leave stuff out and still be able to do 4 questions in section C, like someone above did say that 3 questions come up from sections 1 and 2, and I know that, so if I do reproduction and excretion from section 3, will I be risking it?


  • Registered Users, Registered Users 2 Posts: 159 ✭✭biggaman


    njd2010 wrote: »
    Anyone know how important specific quantities are in the part Bs? Like would "add hydrogen peroxide" get less marks than say, "add 5cm^3 of Hydrogen peroxide"?

    Also- we didn't do the nitrogen cycle... is it important enough to warrant spending time on it in the morning?

    Ecology is an annual guaranteed question. Nitrogen Cycle hasn't appeared since '07. I'd say there's a pretty good chance it'll appear!

    It's a bitch to learn get your head around what to learn at first, but when you write it down it's actually not that bad! I just done that there now :D


  • Registered Users, Registered Users 2 Posts: 155 ✭✭G.J.


    I am not a LC this year (thankfully) but according to my book 9 is the optimum pH for Catalase...couldn't bear not to contribute.

    Best of luck tomorrow to you all! :)

    Yay, thank you! :)

    I was looking everywhere in my book and couldn't find anything on it, we did the catalase one as an 'easier to measure' experiment.


  • Registered Users, Registered Users 2 Posts: 159 ✭✭biggaman


    cocopopsxx wrote: »
    No, I don't even have a revision book. :(
    Can I like leave stuff out and still be able to do 4 questions in section C, like someone above did say that 3 questions come up from sections 1 and 2, and I know that, so if I do reproduction and excretion from section 3, will I be risking it?

    Well human reproduction is usually a guaranteed question for section 3, so if you know unit 1 + 2 and that, you could be lucky. Theres other predictions from unit 3 too, I'm going with most of unit 1 + 2 and then a few topics from unit 3 due up!


  • Closed Accounts Posts: 11 adler


    I hope that Plant reproduction is a sub q that can be avoided. I think its the hardest chapter, with all that diploid, haploid, nuclei, motherspore cells things going on...female reproductive parts to draw are tipped considering male has kept appearing, plant responses, skeletal, enzyme experiments, respiration and/or photosynthesis, genetics,
    its quite hard to predict, as the course is so large but thinking that reproduction, genetics, respiration/photosynthesis and enzymes are a must to learn. Good luck tomorrow!


  • Closed Accounts Posts: 75 ✭✭terryincork


    Can someone list what experiments are highly tipped to come up? :(


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  • Registered Users, Registered Users 2 Posts: 159 ✭✭biggaman


    Can someone list what experiments are highly tipped to come up? :(

    Also, there are between 20 & 25 experiments on the course. These 16 are most likely to be asked in June. (The ones written in italics have never been asked before!):-


    1. Investigate effect of exercise on pulse or breathing rate
    2. To demonstrate Osmosis
    3. Examine Plant cells under microscope
    4. Use instruments to collect animals in an ecosystem
    5. Test for Starch

    6. Effect of temperature on enzyme action
    7. Effect of PH on Enzymes
    8. Use Yeast to produce Ethanol
    9. Isolate DNA from a plant (onion)
    10. Show factors essential for seed germination
    11. Investigate growth of leaf yeast
    12. View TS of Dicot Stem
    13. Interpret Ecological keys
    14. Test for protein / Test for Reducing sugar
    15. Show Digestive Activity during Germination
    16. Immobilize an Enzyme

    From Eoin Jackson's prediction!


  • Closed Accounts Posts: 75 ✭✭terryincork


    biggaman wrote: »
    Also, there are between 20 & 25 experiments on the course. These 16 are most likely to be asked in June. (The ones written in italics have never been asked before!):-


    1. Investigate effect of exercise on pulse or breathing rate
    2. To demonstrate Osmosis
    3. Examine Plant cells under microscope
    4. Use instruments to collect animals in an ecosystem
    5. Test for Starch

    6. Effect of temperature on enzyme action
    7. Effect of PH on Enzymes
    8. Use Yeast to produce Ethanol
    9. Isolate DNA from a plant (onion)
    10. Show factors essential for seed germination
    11. Investigate growth of leaf yeast
    12. View TS of Dicot Stem
    13. Interpret Ecological keys
    14. Test for protein / Test for Reducing sugar
    15. Show Digestive Activity during Germination
    16.Immobilize an Enzyme

    From Eoin Jackson's prediction!

    Cheers bosco. The ones in italics arent exactly the hardest experiments so fingers crossed..


  • Registered Users, Registered Users 2 Posts: 814 ✭✭✭NotExactly


    I posted this in the Biology thread and I got no answer :o
    But anyway.. I have a few questions

    Ecology
    I was missing for parts of Ecology. I studied grassland though, can somebody please give me a list of the flora and fauna and anything else on the Biology course that isn't in the book. Thanks. Oh and is it just for ecology that we study different things?

    Genetic engineering
    What are vectors?

    What is an anticodon?

    What is the name of the plant(herbaceous stem) in the experiment to examine a transverse section of a dicot stem & what is the result?

    What is a polar nuclei? (marking scheme says in embryo sack?)

    What is an energized electron?

    Where would you be expected to find an active site?

    What colour does alchohol go? Does this sound right. Adding potassium iodide and sodium hypochloride goes from pale red to pale yellow?

    EDIT: I just found a Biology to do list in my room and found more questions sorry,

    What is a plant tissue?
    What is a triplet? It's role and an example?

    I'm sorry if these are in the book I can't seem to find them.


  • Registered Users Posts: 261 ✭✭cocopopsxx


    biggaman wrote: »
    Well human reproduction is usually a guaranteed question for section 3, so if you know unit 1 + 2 and that, you could be lucky. Theres other predictions from unit 3 too, I'm going with most of unit 1 + 2 and then a few topics from unit 3 due up!

    I really hope I'll be ok, I'm so screwed for biol otherwise!!


  • Registered Users, Registered Users 2 Posts: 159 ✭✭biggaman


    cocopopsxx wrote: »
    I really hope I'll be ok, I'm so screwed for biol otherwise!!

    If it helps I'm only learning human reproduction (only female actually) and urinary system! :)


  • Registered Users, Registered Users 2 Posts: 519 ✭✭✭flyaway.


    Where can I find out what's on the course for OL Biology? My book is confusing me because it has some stuff marked as HL but there was questions about it when I looked through the past OL papers.


  • Closed Accounts Posts: 84 ✭✭Gavarn


    So I was studying Human reproduction for tomorrow when I came across this:

    "During the period of pregnancy testosterone causes the development of primary male sex characteristics. These include the development of the penis and the other male reproductive parts." - http://leavingbio.net/HUMAN%20REPRODUCTION-WEB.htm

    :eek:

    I'm never going to get a woman pregnant! :p


  • Registered Users Posts: 261 ✭✭cocopopsxx


    biggaman wrote: »
    If it helps I'm only learning human reproduction (only female actually) and urinary system! :)
    Ah, at least I'm not the only one! Let's hope we'll be ok with them! I need to do the urinary system too!! It's about time I get off boards! -__-


  • Registered Users, Registered Users 2 Posts: 159 ✭✭biggaman


    flyaway. wrote: »
    Where can I find out what's on the course for OL Biology? My book is confusing me because it has some stuff marked as HL but there was questions about it when I looked through the past OL papers.

    http://www.curriculumonline.ie/uploadedfiles/PDF/lc_biology_sy.pdf


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  • Closed Accounts Posts: 5,734 ✭✭✭J_E


    1. Do we have to know what they are? Thought you just referred to them when talking about genetic engineering
    2. It's a set of 3 codons attached to an amino acid (tRNA)
    3. Polar nuclei are formed in the embryo sac. They fuse with the generative nucleus to make the triploid endosperm.
    4. An electron in an excited state? Not sure
    5. The area where the enzyme reacts with the substrate.
    6. If you use the potassium iodide method, it should go a yellow-green I think.

    Sorry if these aren't accurate. You've kind of scared me because I didn't really know all of these myself when I should :o


  • Registered Users, Registered Users 2 Posts: 62 ✭✭crayon1


    A vector is a carrier of a virus!

    For the dicot stem you could just use celery and the result is that you can see the different tissues i.e. vascular, dermal and ground!

    What is an energized electron?
    Ammmm is it that it has high energy? Like the ones used to convert ADP + P to ATP


  • Registered Users, Registered Users 2 Posts: 814 ✭✭✭NotExactly


    Cydoniac wrote: »
    1. Do we have to know what they are? Thought you just referred to them when talking about genetic engineering

    It's a question some where anyway. The last month i've done every question possible.
    Cydoniac wrote: »
    6. If you use the potassium iodide method, it should go a yellow-green I think.
    Can somebody confirm this? sorry.
    Cydoniac wrote: »
    Sorry if these aren't accurate. You've kind of scared me because I didn't really know all of these myself when I should :o

    Thanks a million, sorry for scaring ya :o


  • Registered Users, Registered Users 2 Posts: 642 ✭✭✭brownlad


    Gavarn wrote: »
    So I was studying Human reproduction for tomorrow when I came across this:

    "During the period of pregnancy testosterone causes the development of primary male sex characteristics. These include the development of the penis and the other male reproductive parts." - http://leavingbio.net/HUMAN%20REPRODUCTION-WEB.htm

    :eek:

    I'm never going to get a woman pregnant! :p

    that does not make sense bro


  • Registered Users Posts: 329 ✭✭xaoifsx


    for the last one i have brown to yellow
    in another book its red to yellow

    red and brown are round about the same colour


  • Registered Users, Registered Users 2 Posts: 62 ✭✭crayon1


    Test for alcohol using potassium iodide and sodium hypo-chloride goes from Brown-orange to pale yellow crystals!

    Potassium dichromate + sulphuric acid goes from orange to green!


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  • Closed Accounts Posts: 84 ✭✭Gavarn


    NotExactly wrote: »
    Can somebody confirm this? sorry.

    "To Test For Alcohol
    -1. Filter the yeast solution from the conical flask
    -2. Add 3 drops of the solution to 3 drops of potassium iodide and 3 drops of sodium hypochloride solution, warm gently (note it is brown in colour).

    Result: The presence of pale yellow crystals shows that alcohol has been produced."

    In my revision book. :)


  • Registered Users Posts: 329 ✭✭xaoifsx


    if i do not do well in this exam..i am going to cry!! :(


  • Registered Users Posts: 329 ✭✭xaoifsx


    i hope this comes up now because we would all know it so well :D


  • Closed Accounts Posts: 84 ✭✭Gavarn


    brownlad wrote: »
    that does not make sense bro

    Yeah I know it's just what they wrote on that study page.

    I thought it was funny :p


  • Registered Users Posts: 243 ✭✭GoldRush4821


    The important thing about the potassium iodide and sodium hypoclorite is that it contains pale yellow crystals... It may go brown orange first of all but when put in a hot water bath, pale yellow crystals appear

    Energised electrons are like what are found in the chlorophyll molecule when light is passed through the pigments... The light energises existing electrons and they go around 1 of 2 pathways, losing energy as they go around... They return as low energy electrons or in non cyclic they combine with NADP+ to form NADP-, then H+ combines with that to form NADPH etc...


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  • Registered Users, Registered Users 2 Posts: 642 ✭✭✭brownlad


    NotExactly wrote: »
    I posted this in the Biology thread and I got no answer :o
    But anyway.. I have a few questions

    Ecology
    I was missing for parts of Ecology. I studied grassland though, can somebody please give me a list of the flora and fauna and anything else on the Biology course that isn't in the book. Thanks. Oh and is it just for ecology that we study different things?

    Genetic engineering
    What are vectors?
    the plasmid carrying the target gene

    What is an anticodon?
    an mrna has a codon(three bases E.G A,T,G ) trna has anticodon ( T,A,C)

    What is the name of the plant(herbaceous stem) in the experiment to examine a transverse section of a dicot stem & what is the result?

    What is a polar nuclei? (marking scheme says in embryo sack?)
    2polar nuclei that join with male gamete to form triploid endosperm
    What is an energized electron?
    electron that has been given light energy
    Where would you be expected to find an active site?
    on an enzyme
    What colour does alchohol go? Does this sound right. Adding potassium iodide and sodium hypochloride goes from pale red to pale yellow?
    orange to green
    EDIT: I just found a Biology to do list in my room and found more questions sorry,

    What is a plant tissue? ground, vascular, dermal, meristematic
    What is a triplet?three bases
    It's role and an example? already given

    I'm sorry if these are in the book I can't seem to find them.
    :pac:


  • Registered Users Posts: 87 ✭✭r0cks0l1dd


    What do you need to know. I have an old book so it gives WAY too much information on it.

    Also, I wouldn't do too much on Protein Synthesis. It came up last year so the chances are slim.


  • Registered Users, Registered Users 2 Posts: 29,509 ✭✭✭✭randylonghorn


    Gavarn wrote: »
    I'm never going to get a woman pregnant! :p
    I assure you that you'll find it much tougher to get a man pregnant! :D


  • Closed Accounts Posts: 84 ✭✭Gavarn


    I assure you that you'll find it much tougher to get a man pregnant! :D

    I don't plan on trying! :p


  • Closed Accounts Posts: 452 ✭✭Platinum2010


    so its actually potassium iodide , thats not a spelling mistake?


  • Closed Accounts Posts: 5,734 ✭✭✭J_E


    so its actually potassium iodide , thats not a spelling mistake?
    That's the one, yeah.


  • Closed Accounts Posts: 452 ✭✭Platinum2010


    Is everyone else ok for the long questions , cus im done for with um
    may just ask for the pass paper


  • Closed Accounts Posts: 66 ✭✭GregoryNimmo


    I am actually to tired to study this. I know bits and bobs and have never failed a test... But seriously want to do well, but just ...too...tired and don't know whether to sleep cause you know when you wake up and all you wanna do is go back to sleep haha


  • Closed Accounts Posts: 5,734 ✭✭✭J_E


    Is everyone else ok for the long questions , cus im done for with um
    may just ask for the pass paper
    Don't give up unless you're failing the Higher Level already.


  • Closed Accounts Posts: 452 ✭✭Platinum2010


    Barely Passed the pre paper ....


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  • Closed Accounts Posts: 68 ✭✭emma123abc


    Barely Passed the pre paper ....


    There's not much difference between the honours and ordinary level paper... just a tiny bit more detail in honours and one of the experimemts isnt on the ordinary level paper...

    So you're better off sticking with honours because a C3 is the same as an A in honours, but it'd be harder to get the passA than the honoursC

    :)


  • Registered Users Posts: 215 ✭✭BrendaN_f


    Barely Passed the pre paper ....

    if you really think there's a good chance you'll fail, take the ordinary

    if not, go for higher brah


  • Registered Users, Registered Users 2 Posts: 519 ✭✭✭flyaway.


    I have just decided to take the OL paper... there is a huge chance I will fail the HL paper and I'd rather just take whatever points I can get in OL than end up getting no points.


  • Closed Accounts Posts: 452 ✭✭Platinum2010


    BrendaN_f wrote: »
    if you really think there's a good chance you'll fail, take the ordinary

    if not, go for higher brah

    see im not sure cos going into my pree i didnt know sweet f all experiments and basically got no points for section B


  • Closed Accounts Posts: 5,109 ✭✭✭QueenOfLeon


    r0cks0l1dd wrote: »
    What do you need to know. I have an old book so it gives WAY too much information on it.

    Also, I wouldn't do too much on Protein Synthesis. It came up last year so the chances are slim.

    The dark stage is the light INdependent stage, not dependent stage. It can function with light but it is not necessary.

    What you need to know is what it uses - the products of the light dependent stage, which are ATP and NADPH. ATP breaks down to ADP + P to provide the energy for the reaction, and NADPH breaks down to electrons, protons and NADP.

    The electrons, protons, and CO2 (from respiration or from the atmosphere) join to form glucose. Final products of the dark stage are glucose (used in respiration) and NADP and ADP+P (both return to be used in the light stage).


  • Registered Users Posts: 102 ✭✭galwayman17..


    G.J. wrote: »
    Damn, I was always taught that it was a pH of 6-7 for humans and around 8-9 for plants. Sorry about that! >.<

    you are forgiven!;)


  • Registered Users Posts: 102 ✭✭galwayman17..


    xaoifsx wrote: »
    if i do not do well in this exam..i am going to cry!! :(

    if what i have studied on this course does not come up tomorrow i will too cry! :(:(


  • Registered Users Posts: 102 ✭✭galwayman17..


    I am actually to tired to study this. I know bits and bobs and have never failed a test... But seriously want to do well, but just ...too...tired and don't know whether to sleep cause you know when you wake up and all you wanna do is go back to sleep haha

    2 spoons a coffee.... 1 sugar.... milk ..... buzzin! time to study!!


  • Closed Accounts Posts: 27 nanor92


    I presume most people are asleep.. but does anyone have all the biology definitions typed up? want to have quick read over them before I go in tomorrow, in the hope I remember some of them.:o


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  • Closed Accounts Posts: 5,109 ✭✭✭QueenOfLeon


    nanor92 wrote: »
    I presume most people are asleep.. but does anyone have all the biology definitions typed up? want to have quick read over them before I go in tomorrow, in the hope I remember some of them.:o

    Check the backs of your biology book or revision book. Theres usually a list of definitions. Good luck tomorrow! :)


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