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2010
Tue
16
Nov
Little Miss Loi avatar

GCE O-Level 2010 Oct/Nov Biology 5094 MCQ Paper 1 Suggested Answers & Solutions & I’m Done!!!

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Tuition given in the topic of Little Miss Loi the Science Tutor (archived) from the desk of Little Miss Loi at 10:10 pm (Singapore time)

Every year, and since time immemorial, it seems that it’s always down to us unfortunate biology students to perform the closing ceremony of the ‘O’ Levels, while others party the weekend away chanting “Bio MCQ? WHAT Bio MCQ?????”

And each year, it’s down to the unfortunately biology tutor (i.e. me) at The Temple to work out the final set of solutions for the season 🙁 (but least this time my brother still has his 100+ comments to go through hur hur):

2010 O-Level October/November Biology 5094 Paper 1 Suggested Solutions

2010 O-Level October/November Biology 5094 Paper 1 Suggested Solutions
– click to download (Latest version: 1.1)

In any case,

it’s over!!!

So while all of you now turn your attention to more pressing matters like choosing your prom dress etc., on behalf on all at The Temple, I hope everyone has had a great ‘A’ & ‘O’ Levels and would like to add that nothing else really matters as long as you’ve tried your best, and do take a bit of comfort from this by-now legendary quote over at the H2 Maths Paper 2 post (even though I know the ‘how many marks to get A1?’ Bell Curve fanatics will disagree with this):

… If we require you to swim 100 metres to get the A and you have shown us that you are capable, you will get it regardless of whether a big group of students have proven themselves to be able to swim around the world.

See you all again in January for Judgement Day!


Holiday Mood

Where is Miss Loi heading next?

Attention! Last but not least, as my sister is deep in the critical last stage of planning for her annual overseas trip, she asks me to inform everyone of her disappearance from 17-29 November 2010, and that the best way to contact her during this period is through email.

頑張って!!!

Revision Exercise

To show that you have understood what Miss Loi just taught you from the centre, you must:

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Comments & Reactions

43 Comments

  1. junkbox's Avatar
    junkbox commented in tuition class


    2010
    Nov
    16
    Tue
    12:31am
     
    1

    my asnwers for bio were CACCC DBBAD AAABC ABDAD CADAA BDBDB ACCCC CADCD

  2. James's Avatar
    James  commented in tuition class


    2010
    Nov
    16
    Tue
    10:17pm
     
    2

    Hi miss Loi, I think u uploaded the chem solutions not the pure bio?

  3. cheese's Avatar
    cheese commented in tuition class


    2010
    Nov
    16
    Tue
    10:37pm
     
    3

    hi for question 16 the explanation is "higher pressure causes the water to move into the capillary" but why is the answer A and not B??

  4. Fred's Avatar
    Fred commented in tuition class


    2010
    Nov
    16
    Tue
    10:49pm
     
    4

    For question 28, why is it not the pollen grain?

  5. Sunil's Avatar
    Sunil commented in tuition class


    2010
    Nov
    16
    Tue
    11:02pm
     
    5

    The answer for question 15 is D. The left ventricle needs to have to a thicker wall than the right ventricle as it has to pump blood to the rest of the body which is a further distance away from the lungs.

  6. Yip Bing You's Avatar
    Yip Bing You commented in tuition class


    2010
    Nov
    17
    Wed
    12:00am
     
    6

    With regards to qns 22, wouldn't the arteriole undergo vasoconstriction, reducing heat loss to surrounding ?

  7. Joanne's Avatar
    Joanne commented in tuition class


    2010
    Nov
    17
    Wed
    1:16am
     
    7

    For qns 13: they asked: Explanation: energy *NOT* produced by....
    Then why is the answer not B? since there is no mitochondria in the sieve tube?

    • pooh's Avatar
      pooh replied to Joanne’s comment


      2010
      Nov
      17
      Wed
      5:18pm
       
      7.1

      @Joanne: Question 13 has to be A because the structure X is poisoned, i.e. respiratory processes are restricted. In normal conditions energy is released by mitrochrondira in companion cells, yes, but when poisoned, it fails to carry out respiration. Therefore, the explaination as to why movement of sugars through the phloem is slowed is due to the companion cells being unable to release energy

  8. Crucified's Avatar
    Crucified commented in tuition class


    2010
    Nov
    17
    Wed
    4:04am
     
    8

    Regarding question 8, why is the answer not C? I find both B and C equally debatable.. Put C as an answer though.. As for 22, I think the arterioles do go through vasoconstriction.. But maybe they don't exactly have muscles which contract or something.. Not too sure bout that too

  9. Victor's Avatar
    Victor commented in tuition class


    2010
    Nov
    17
    Wed
    10:54am
  10. Victor's Avatar
    Victor commented in tuition class


    2010
    Nov
    17
    Wed
    10:57am
  11. K's Avatar
    K commented in tuition class


    2010
    Nov
    17
    Wed
    12:07pm
     
    11

    Thank you so much for uploading the answers!!!

  12. Anonymous's Avatar
    Anonymous commented in tuition class


    2010
    Nov
    17
    Wed
    3:23pm
     
    12

    With regards to Question 8, the answer should not be B. I don't recall the stomach functioning as a short-term storage organ anywhere in the textbook. The correct answer, I feel, should be D. The rectum is a short-term storage organ (for faeces) and it absorbs water as well. The use of rectal suppositories as a mode of delivery for medicine further proves my point on absorption.

    Also, as others have previously mentioned, the answer for Question 22 should be B. Vasoconstriction, which happens when the body temperature is below the norm, is caused by the contraction of the smooth muscles in the arterioles. Ergo, 1 and 2 is correct.

  13. pooh's Avatar
    pooh commented in tuition class


    2010
    Nov
    17
    Wed
    5:15pm
     
    13

    Structure 2, which are arterioles, do have muscles that can constrict but the question asks for muscles that constrict when body is too cold. If Structure 2 were to constrict then more blood would flow to the arterioles near the skin surface due to increased blood pressure which could cause more heat loss through the skin. In this case the most appropriate answer is 1 only. @anonymous the stomach can be said to function as a storage organ as it churns food and holds food until it is fully distended, whereby it gives signals to the brain to relax the pyloric sphincter. On page 94 of Biology matters, one can find that the stomach 'is able to store food for hours'

    • Anonymous's Avatar
      Anonymous replied to pooh’s comment


      2010
      Nov
      17
      Wed
      8:34pm
       
      13.1

      @pooh: @pooh
      Your concept on vasoconstriction is wrong. Read the textbook. Vasoconstriction means less blood flows to to blood capillaries in the skin, decreasing heat loss, i.e. Structure 2 should be included in the answer.

      As for Question 8, it really is up to Cambridge on what they view is the right answer. Both options B and D can be justified, but only one can be the correct answer. Oh well.



    • 2010
      Nov
      18
      Thu
      10:04am
       
      13.2

      @pooh: To add on to Anonymous' reply, the difference in blood pressure is observed when a comparison between artery (smaller lumen, higher blood pressure) and vein (larger lumen, lower blood pressure) is made. Artery does not constrict itself for the purpose of increasing blood flow or blood pressure. Rather, increased body fluid intake or salt intake (which leads to subsequent water re-absorption) would lead to an increase of blood pressure.

      Anyway, as mentioned, I've amended Q22 to B.

  14. pooh's Avatar
    pooh commented in tuition class


    2010
    Nov
    17
    Wed
    5:22pm
     
    14

    For question 18 i believe that answer should be C, 2 only as from S-T the exercise has ended, which would mean that CO2 is being sent back at normal pre-exercise levels. The increased blood flow only serves three key purposes: to increase oxygen supply to muscle cells and to send lactic acid to liver to be oxidised, and to remove excess heat due to exercise.

  15. James's Avatar
    James  commented in tuition class


    2010
    Nov
    17
    Wed
    8:02pm
     
    15

    Hey, are marks above 85 a possible A1 for bio? A1 cannot be as ridiculous as 90 right?

  16. hmmm...'s Avatar
    hmmm... commented in tuition class


    2010
    Nov
    18
    Thu
    8:15am
     
    16

    It seems that many people got q22 wrong. i got it wrong too.. i put B. 🙁 could anyone explain why its A?

  17. wierd's Avatar
    wierd commented in tuition class


    2010
    Nov
    18
    Thu
    1:29pm
     
    17

    shouldnt the ans to 24 be B? reading from the book which has the skeleton picture as its cover, in page 280 it says ciliary muscles contract,relaxing the suspensory ligaments. when it slacken, it pulls the lens,making it thicker,more elastic and convex decreasing its focal length, and light rays from th near object are sharply focused on the retina..

  18. anon's Avatar
    anon commented in tuition class


    2010
    Nov
    22
    Mon
    7:03pm
  19. Izza Bajwa's Avatar
    Izza Bajwa commented in tuition class


    2010
    Dec
    23
    Thu
    5:17pm
     
    19

    wow...u do make bio alot more easier to understand!i find the structure of spinal nerve VERY difficult and it would be very helpful if u explain it!

  20. nervouslykhell's Avatar
    nervouslykhell commented in tuition class


    2011
    Jan
    8
    Sat
    12:34am
     
    20

    is it possible to get A2 for bio if i got 32/40 for this paper??
    🙁
    gd luck on monday everyone hope all pure bio students get A1 and crash the bellcurve! 🙂

  21. kanza's Avatar
    kanza  commented in tuition class


    2013
    Apr
    25
    Thu
    4:25am

One Reaction

  1. Tweetback
    Miss Loi tweeted


    2010
    Nov
    16
    Tue
    2:14pm
     
    22

    Biology MCQs answers are finally out: http://bit.ly/bCC9I9 Time to pack my luggage!

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