ATAR Notes: Forum
Uni Stuff => Universities - Victoria => University of Melbourne => Topic started by: golden on April 07, 2013, 10:31:23 am
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There have been about 12 separate biomedicine threads updated within the last 2 weeks or so, a few of them overlapping in topic - eg. exams, the assignment, assessment tasks.
Maybe we could post any questions we have related here instead.
This way it won't be as messy, and people won't be as likely to miss the questions asked etc.
I'll start with this question of interest:
How are you finding this subject so far?
Edit:
Also Destiny, you have sent me a question via PM yesterday about the assignment but I can't reply as somehow you have blocked me lol.
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great idea for this thread.
Im finding the subject mostly good so far. Love the bio and chem, the maths makes me want to pull my hair out most of the time but i guess its ok too.
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I hope that I fixed it x.x
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does this answer make sense to you?
Question 27: In an environment with an external temperature lower than a mammal’s normal body temperature,
which of the following would be an appropriate physiological or behavioural response if the animal
needed to increase body heat?
A. swimming in a pool of cool water.
B. reducing blood flow to blood vessels in the skin.
C. increasing blood flow to blood vessels in the skin.
D. standing in the rain.
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does this answer make sense to you?
Question 27: In an environment with an external temperature lower than a mammal’s normal body temperature,
which of the following would be an appropriate physiological or behavioural response if the animal
needed to increase body heat?
A. swimming in a pool of cool water.
B. reducing blood flow to blood vessels in the skin.
C. increasing blood flow to blood vessels in the skin.
D. standing in the rain.
yeah thats right.you reduce blood flow by constricting the vessels to prevent heat loss
what is this for??
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thanks just wanted to make sure i was correct. Just some practice bio questions
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It's from the practise mid-sem test on the LMS
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i need help with question 5 (it says question 9 but it's actually 5) in the week 4 tutorial for CHEM10006 (pg 26). the higher substituted the alkene is the more stable it is, then why will it have a higher rate of reaction? shouldn't it be the other way around?
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In the case of Sn1 reactions (when the leaving group cleaves off first), the more substituted alkenes will have a higher rate of reaction as their transition states will have lower energy. The more substituted carbocations are easier to form. The first step (ionisation) is the rate determining step for Sn1 reactions and hence they will react more quickly.
However, in the case of Sn2 reactions, the more substituted alkenes will have a slower rate of reaction due to steric hinderance.
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i had a biology prac today and we had to do an experiment which involved the fermentation of starch, sucrose, fructose and glucose by yeast. the amount that fermented was indicated by a color change of the Thymol blue indicator. i was not able to get the final results due to a lack of time. would anyone be able to share their results with regards to which of the carbohydrate solutions was fermented the most by the yeast and also touch on which of the carbohydrates was metabolized most rapidly.
i appreciate your help.
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Hey guys can anyone suggest where I can read up on reactions? I'm having trouble with this part of the course. I tried reading the textbook but it confused me even more. Are there any videos you can suggest? I feel like I understand what is happening in lectures, but in the tutorial this week I was kinda lost... :(
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have you tried chemcal?
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Yeah, just did the chemcal tutorials, they helped out heaps! Btw does anyone have the solutions for Q3(iii) (a) and (b) in the chem tute book (week 5)? My tutor wrote down the answers but I didn't have time to copy them down and check whether mine were right. Thanks, I'd appreciate it!
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i was just wondering if anyone had a simple way of seeing whether a molecule will undergo a Sn1, Sn2, E1 or E2 reaction?
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i was just wondering if anyone had a simple way of seeing whether a molecule will undergo a Sn1, Sn2, E1 or E2 reaction?
http://quizlet.com/7452274/identify-reactions-sn1-sn2-e1-e2-flash-cards/
this helps quite a bit
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how was the first mid semester test? Don't post any questions or anything, just want to know the difficulty even though im sure they will alter it from group to group.
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Who is currently lecturing for BIOM10002 and CHEM10006?
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there's Professor Matthew Digby for BIOL100002 and Professor Abraham for CHEM10006
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Oh man, exams are in in a month and a half. Is anyone struggling to keep up with the work? I feel like I barely catch up on the weekend, and then the new material that week drowns me completely. Hoping I have enough time for some proper revision ... :(
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there's Professor Matthew Digby for BIOL100002 and Professor Abraham for CHEM10006
Professor Matthew Digby wasn't the lecturer for last year (BIOM10002), but Professor Abraham was (CHEM10006) and he was awesome. He is very polite, friendly and great at what he does.
Oh man, exams are in in a month and a half. Is anyone struggling to keep up with the work? I feel like I barely catch up on the weekend, and then the new material that week drowns me completely. Hoping I have enough time for some proper revision ... :(
Don't be sad. Be happy at the idea that this is the lowest workload you will get whilst at Uni. It gets worse later apparently. A lot.
But don't worry, you'll get better at what you do. Just hold on.
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Do we get a periodic table for our CHEM10006 exam?
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Do we get a periodic table for our CHEM10006 exam?
My tutor said we dont. She said all we have to know is the first 30 elements.
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I don't even remember the first 20 elements...
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Ah crap! Learning that now.
Would anyone know how to do this question?
(http://img96.imageshack.us/img96/7506/37660204.png)
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Clues:
Make sure you address the + and - part first.
Think about what borohydride would do to the sugar.
Satisfy all the requirements of the question.
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It's related to threose, which means that it is Gulose, Idose, Galactose or Talose: So B, C or D.
Borohydride reduces the sugar - it is a source of hydride anions, but I don't think that that helps here as there are the same hydroxy/aldehyde groups on all molecules. I can't narrow down the answer any further. I assume that D/L are related to clockwise/anticlockwise rotation, but texts say otherwise.
Anticlockwise is -ve, but again, no relation to Dextrorotation or levorotation
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I think you can knock off C.
D-Idose and D-Threrose both rotate polarised light in an anticlockwise direction (so both are -), but F is related to the enantiomer that rotates it in a clockwise direction. As enantiomers rotate polarised light in opposite directions, the (+)-threrose, I think, would have to be the L-form, and so would the Idose. So C is gone.
Sodium borohydride would reduce the sugar so that the aldehyde group is converted into a primary alcohol right? That's reflected in the two extra hydrogens being added onto the compound. But that doesn't get rid of B or D. They're both optically inactive because the first carbon doesn't have four different groups, making it symmetrical.
I can't differentiate between the two options.
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Anticlockwise is -ve, but again, no relation to Dextrorotation or levorotation
D or L as being either positive or negative is provided in this question for these set of examples.
I think you can knock off C.
Sodium borohydride would reduce the sugar so that the aldehyde group is converted into a primary alcohol right? That's reflected in the two extra hydrogens being added onto the compound. But that doesn't get rid of B or D. They're both optically inactive because the first carbon doesn't have four different groups, making it symmetrical.
I can't differentiate between the two options.
Just because there are two groups which 'appear' to be the same (but are not actually so) doesn't mean that there isn't optical activity. I guess a way you could think of it is in chemistry even though molecules have the same numbers of atoms and elements in it, they can still be different. Even if they have the same bonds, they can still be different (stereoisomers).
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Hey where was that question from? I finished the exam wiki stuff but desperately need more practice
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Hey where was that question from? I finished the exam wiki stuff but desperately need more practice
What's the point of doing the exam Wiki? They don't have ANY answers and you just lost your best source of practice for right before the the exam.
That's the 2009 paper.
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Hey where was that question from? I finished the exam wiki stuff but desperately need more practice
...I haven't even started exam wiki. Was it hard?
D or L as being either positive or negative is provided in this question for these set of examples.
Just because there are two groups which 'appear' to be the same (but are not actually so) doesn't mean that there isn't optical activity. I guess a way you could think of it is in chemistry even though molecules have the same numbers of atoms and elements in it, they can still be different. Even if they have the same bonds, they can still be different (stereoisomers).
But if a primary alcohol is produced, there aren't any chiral centres right? So theoretically they should be optically inactive right :/
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I only did the MC (there are ~22) and they seem reasonable, some required more thinking than others and about 2 questions I was uncertain of (mostly to do with identifying the type of reaction because I am kinda bad at that)
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Omg, started the exam wiki and so far it seems so much easier than the 2009 paper wtf?
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I thought it would be better to save that exam for later?
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I thought it would be better to save that exam for later?
Save some for later; they will prove handy.
But if a primary alcohol is produced, there aren't any chiral centres right? So theoretically they should be optically inactive right :/
I hope I understand what you are saying. I apologise if I don't.
Look at say D-(+)-altrose, I'll use that unrelated example so you can still do the question:
If you reduce the aldehyde, it will become an alcohol as you have mentioned.
So now it has terminal alcohol groups. The carbons attached to these alcohols are not chiral. But all of the other carbons in the chain (4 of them) are chiral as they have different groups. Does that help?
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I thought it would be better to save that exam for later?
Exam or MST, I don't know. Now I realise that I wasted the 2009 paper because I couldn't do any of the questions!
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2009 was the best year :3
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Save some for later; they will prove handy.
I hope I understand what you are saying. I apologise if I don't.
Look at say D-(+)-altrose, I'll use that unrelated example so you can still do the question:
If you reduce the aldehyde, it will become be an alcohol as you have mentioned.
So now it has terminal alcohol groups. The carbons attached to these alcohols are not chiral. But all of the other carbons in the chain (4 of them) are chiral as they have different groups. Does that help?
Oh right! Yes, I understand now. I didn't take into account all the other carbons on the Fischer Projection. So because they still have at least one chiral group, they can still have some optical activity.
In this case, is L-Galactitol optically inactive? I flipped it around upside down and sure enough, the mirror-image was superimposable so it was achiral. Hence B?
I wasn't able to tell that it was achiral just by looking at the groups branching off each carbon though, could someone explain to me how to do that?
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anyone remember roughly how many marks the bio exam for first year biomed is?
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Has anyone done the Chem MST? Just wondering what it's like in terms of difficulty
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Is it possible to transfer to BioMed provided I get the marks in first year uni? Also, what prereqs would I definitely need? I'm doing Methods now
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Anybody else finding chemistry incredibly boring and painful to learn? This semester cannot end quick enough...
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Anybody else finding chemistry incredibly boring and painful to learn? This semester cannot end quick enough...
Yes.
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Yes... especially the new stuff with the new lecturer. He's nice but the content is completely uninteresting
PS does anybody know if the Chem MST is the same for everyone?
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The content's not that bad, although hearing all this pile of information the first time through feels pretty overwhelming.
The MST is slightly different for everybody, similar concept-related questions but they may vary some stuff.
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how has second year been so far for some of you guys? Whats the difference compared to 1st year? Just in general: difficulty, workload, etc, because it seems pretty full on this year, cant imagine what next year will be like lol. Thanks
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Every biomed third year appears to be whinging as much as possible about their subjects right now, please don't be that person
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lol sorry if i came across as whinging lol, i actually am likeing this year, its a bit tough but i like a challenge. Just wondering how it will compare to next year
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Oh sorry, I rephrased my sentence halfway through and it ended up with a completely different tone. I wasn't calling you whinging at all, it's completely legitimate to want to ask about future years.
What I meant, was that the workload does go up and things change; please accept that you're being taught certain things and don't whinge about it just because it's not what you want to be taught/think you should be taught. Second/third year is great if you want it to be great and horrible if you just want to complain (like far too many people I am seeing atm)
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ye i try to look at the good things, far too many do complain, even this year and i think you shouldnt have gone into this course expecting it to be easy, but cant help but listen to their whinging.
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Oh sorry, I rephrased my sentence halfway through and it ended up with a completely different tone. I wasn't calling you whinging at all, it's completely legitimate to want to ask about future years.
What I meant, was that the workload does go up and things change; please accept that you're being taught certain things and don't whinge about it just because it's not what you want to be taught/think you should be taught. Second/third year is great if you want it to be great and horrible if you just want to complain (like far too many people I am seeing atm)
Lol...molecule to malady midsem?
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Yep. God forbid you have to memorize things for exams -.-
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Molecule to Melancholy: a tale of the average disgruntled Biomedicine student.
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Yeah, it's a bit absurd. Some of them are complaining that they're not being tested on skills they'll need as a doctor and idgi. You're a biomedical science student and expecting you to know the biochemical and molecular basis of the stuff taught is pretty valid.
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Some of them are complaining that they're not being tested on skills they'll need as a doctor and idgi.
Newsflash: you're not all even going to apply to/get into/do medicine and become a doctors gosh.
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I find it extremely weird how there are some people in the course who say they hate learning Biology, I mean why even enrol in a Biomedicine course then...
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I find it extremely weird how there are some people in the course who say they hate learning Biology, I mean why even enrol in a Biomedicine course then...
How does one not enjoy biology, let alone be enrolled in a biomedical course and not enjoy biology?
Absurd.
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has anybody started studying for their exams yet? I feel like i should be but this summarising of lectures takes up so much time. words of wisdom from past first year biomed students would be great. I know summarising is a form of revision but i mean in terms of specifically studying for exams. Or do most just leave it to SWOTVAC? In case you need them, our exams are bio- thursday june 13th, maths and chem on the following wed and thurs, then my breath is the following week.
Thanks
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nobody? :(
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Khan Academy is great for all those reactions but sometimes they do go quite slow. Below is link for the organic chem playlist.
https://www.khanacademy.org/science/organic-chemistry
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can someone please help with the second part(ii)? thanks
(a) Calculate the following:
(i) the pH of a solution obtained by mixing a solution of 100.0 mL of 0.20 M NH3 with a
solution of 50.0 mL of 0.20 M NH4Cl. pKb(NH3) = 4.8
(ii) the pH of the solution in (i) above after the addition of 0.2 mole of gaseous HCl (ignore
volume changes)
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My question is a bit different to the typical questions on this thread, but I figured this would be the best place to ask.
What career options are there after completing a biomedicine degree if one is unable to become an MD/embark on medicine?
Any help would be appreciated :)
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My question is a bit different to the typical questions on this thread, but I figured this would be the best place to ask.
What career options are there after completing a biomedicine degree if one is unable to become an MD/embark on medicine?
Any help would be appreciated :)
Research/ phd. For example, my sister continued with genetics and eventually got into the bioethics field and is completing her phd atm. Also other possibilities e.g. biomed engineering, except I think a lot of people have started thinking of that as a "backup option" without really knowing what it actually entails.
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Dentistry and Optometry are also post-grad options you can choose from.
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You can also do a whole host of other health related professional/vocational degrees. A friend who finished Biomed last year missed out on med and is doing Speech Pathology, another is doing Clinical Audiology (both are Masters degrees). There are also some degrees in things like Public Health and Nursing and a number of Masters programs at other institutions (eg Monash) which would be health related too!
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can someone please help with the second part(ii)? thanks
(a) Calculate the following:
(i) the pH of a solution obtained by mixing a solution of 100.0 mL of 0.20 M NH3 with a
solution of 50.0 mL of 0.20 M NH4Cl. pKb(NH3) = 4.8
(ii) the pH of the solution in (i) above after the addition of 0.2 mole of gaseous HCl (ignore
volume changes)
Can anybody help please? It's been on the chem exam the past few years