Results are out! Find what you need...fast. Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

OCR Biology F214 Communication, Homeostasis and Energy Wed 25 Jan 2012

Announcements Posted on
Applying to Uni? Let Universities come to you. Click here to get your perfect place 20-10-2014
    • 2 followers
    Offline

    ReputationRep:
    (Original post by roflcopter123)
    You have any tips on how to make a quality comeback lol?
    Memorise the key points in the topics, make sure you understand everything
    Read the question properly and answer specifically, don't waffle on.
    In questions where data is given, always include figures.

    u have any tips??
    • 0 followers
    Offline

    ReputationRep:
    (Original post by Bi0logical)
    Memorise the key points in the topics, make sure you understand everything
    Read the question properly and answer specifically, don't waffle on.
    In questions where data is given, always include figures.

    u have any tips??
    You dont want tips from a guy who just got a D in that paper
    Do we need to know about RQ value and respirometer ??
    • 2 followers
    Offline

    ReputationRep:
    (Original post by roflcopter123)
    You dont want tips from a guy who just got a D in that paper
    Do we need to know about RQ value and respirometer ??
    Ah is that what you got last year? This is my first time, hopefully not re-sitting this
    I dont think we need to know about RQ values and respirometer, if they do ask us about RQ values, they'll give us the equation and we plug in the numbers
    learn about the different respiratory substrates and which ones better etc
    • 0 followers
    Offline

    ReputationRep:
    (Original post by Bi0logical)
    Ah is that what you got last year? This is my first time, hopefully not re-sitting this
    I dont think we need to know about RQ values and respirometer, if they do ask us about RQ values, they'll give us the equation and we plug in the numbers
    learn about the different respiratory substrates and which ones better etc
    got a B last year but im resiting both AS units in jan got a D in the mock jan 2010, hopefully i can get atleast a b in this module and get an A in maths, A* in chem
    Atleast we dont have to learn about respirometers ty
    • 12 followers
    Offline

    ReputationRep:
    (Original post by Bi0logical)
    Ah is that what you got last year? This is my first time, hopefully not re-sitting this
    I dont think we need to know about RQ values and respirometer, if they do ask us about RQ values, they'll give us the equation and we plug in the numbers
    learn about the different respiratory substrates and which ones better etc
    you need to know why lipids and proteins give RQs <1 and it's because the need more oxygen to respire them. you're probs right though as you can work that out just with the equation
    • 0 followers
    Offline

    ReputationRep:
    What types of experiments could be performed to measure the rate of photosynthesis for temperature, light intensity and CO2 concentration?

    So far i have:
    light intensity - use a lamp at different distances, measuring O2 produced through capillary tube
    CO2 conc. - sodium hydrogen carbonate indicator, compare colours at the end to other pH indicators
    • 16 followers
    Offline

    ReputationRep:
    (Original post by --NWzD9--)
    What types of experiments could be performed to measure the rate of photosynthesis for temperature, light intensity and CO2 concentration?

    So far i have:
    light intensity - use a lamp at different distances, measuring O2 produced through capillary tube
    CO2 conc. - sodium hydrogen carbonate indicator, compare colours at the end to other pH indicators
    My guess would be put some chloroplast discs in water with different temperature ( 25 is the optimum you can use)
    so lets say at temp : 0 10 15 20 25 30 35

    Not sure if 0 is necessary tho! then you can draw the graph if you wish to

    I mean such exp. might not even exist..so please do let me know if there is any :rolleyes:
    • 0 followers
    Offline

    ReputationRep:
    (Original post by arvin_infinity)
    My guess would be put some chloroplast discs in water with different temperature ( 25 is the optimum you can use)
    so lets say at temp : 0 10 15 20 25 30 35

    Not sure if 0 is necessary tho! then you can draw the graph if you wish to

    I mean such exp. might not even exist..so please do let me know if there is any :rolleyes:
    Thanks. I think that could be a valid experiment.
    Would using coloured filters to only expose plants to certain wavelengths count as an experiment?
    • 1 follower
    Offline

    ReputationRep:
    Suggest questions and practical questions are what hurt me last time
    • 5 followers
    Offline

    ReputationRep:
    (Original post by osman705)
    Suggest questions and practical questions are what hurt me last time
    every time.
    • 0 followers
    Offline

    ReputationRep:
    the exam is in 20 days and ive only properly revised communication + homeostasis and excretion... predicted an A

    there is absolutely no chance im gonna get that now... FML
    • 0 followers
    Offline

    ReputationRep:
    (Original post by glitterphobia)
    You're welcome! They're helping me too so i'm glad you like them

    http://learn123.co.nr
    My hero!
    • 1 follower
    Offline

    ReputationRep:
    http://learn123.co.nr

    (Original post by sumsum123)
    They defo are! Awesome change from making notes/reading. And did you make that websit , I have been using that for like a week now!! It is ahmazingg !
    Yep! Been making it for about a year now cause I always struggled revising the "normal" way, so I thought that I'd just put everything in one place so then I can revise in loads of different ways haha :P
    • 1 follower
    Offline

    ReputationRep:
    (Original post by Fezzes_Are_Cool)
    My hero!
    <333
    • 9 followers
    Offline

    ReputationRep:
    (Original post by glitterphobia)
    http://learn123.co.nr



    Yep! Been making it for about a year now cause I always struggled revising the "normal" way, so I thought that I'd just put everything in one place so then I can revise in loads of different ways haha :P
    Wow! You are out of this world! Pretty kool man! Thanks doe, you are a mahosive help. I struggled alottt during AS and am trying to keep on top of it this year because I am pretty desperate to pass , your site and youtube link are a big big help
    • 0 followers
    Offline

    ReputationRep:
    got an offer for cambridge and now i HAVE to ace this exam...anyone have any tips?
    • 0 followers
    Offline

    ReputationRep:
    I AM Struggling with this exam but there is a pattern:
    First question is a like a compare two processes e.g secretion and excretion
    Then it goes to a few suggest questions
    Long mark explain/graphs/calvin,krebs,glycolysis question and few questions on excretion
    Finally THE ****TY SUGGEST PHOTOSYNTHESIS experiment questions which are pissing me right off
    • 2 followers
    Offline

    ReputationRep:
    (Original post by roflcopter123)
    I AM Struggling with this exam but there is a pattern:
    First question is a like a compare two processes e.g secretion and excretion
    Then it goes to a few suggest questions
    Long mark explain/graphs/calvin,krebs,glycolysis question and few questions on excretion
    Finally THE ****TY SUGGEST PHOTOSYNTHESIS experiment questions which are pissing me right off
    Thanks
    • 3 followers
    Offline

    ReputationRep:
    Is it weird that I'm actually feeling more confident for this exam than my F212 resit?
    And I think I agree with the general consensus on this thread that the photosynthesis experiment questions are a bitch.
    • 0 followers
    Offline

    ReputationRep:
    Helloo, I was wondering if anyone could just clear something up for me please? In the communication and homeostatis module about the neurones and the action potential, can the voltage-gated channels open before the threshold potential is reached or do they only open after that's reached?

    Also I'm a bit unsure about the value of the resting potential, the textbook says it's -60mV but my teacher says it's -70mV?
    Sorry to be a pain, thank you if anyone can help me:-)

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: November 26, 2012
New on TSR

Personal statement help

Use our clever tool to create a PS you're proud of.

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.