Biomedicine Question Thread

[golden]

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.

[Belgarion]

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.

[Destiny]

I hope that I fixed it x.x

[Belgarion]

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.

[ferrsal]

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??

[Belgarion]

thanks just wanted to make sure i was correct. Just some practice bio questions

[Shenz0r]

It's from the practise mid-sem test on the LMS

[M-D]

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?

[Shenz0r]

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.

[M-D]

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.

[ferrsal]

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... 

[Belgarion]

have you tried chemcal?

[ferrsal]

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!

[Belgarion]

i was just wondering if anyone had a simple way of seeing whether a molecule will undergo a Sn1, Sn2, E1 or E2 reaction?

[ferrsal]

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