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August 28, 2025, 09:09:01 am
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Author Topic: The Biological Question Thread  (Read 69781 times)  Share 

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Russ

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Re: The Biological Question Thread
« Reply #45 on: September 29, 2010, 11:44:11 am »
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Quote from: stonecold on September 29, 2010, 11:40:57 am
How is A right?  Doesn't that represent crossing over which has occurred between alleles A/a and B/b ?

Yes.

Your original list (ABE/abe/ABe/abE) was correct, none of the options for that MCQ are right

e, might just mention if something like 3 comes up in an exam, you can cross out anything that has thymine in it (in that case you would eliminate A/B/C straight away :) )
« Last Edit: September 29, 2010, 11:56:34 am by Russ »
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Wally

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Re: The Biological Question Thread
« Reply #46 on: September 29, 2010, 11:45:40 am »
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woops sorry guys.. just ignore me :]
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jasoN-

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Re: The Biological Question Thread
« Reply #47 on: October 01, 2010, 07:47:00 pm »
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To what extent do we need to understand Geological time and the eras/periods/epochs etc.
Thanks
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Jdog

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Re: The Biological Question Thread
« Reply #48 on: October 01, 2010, 07:51:26 pm »
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Quote from: jasoN- on October 01, 2010, 07:47:00 pm
To what extent do we need to understand Geological time and the eras/periods/epochs etc.
Thanks

I m pretty sure they give us any information of that sort in the question, at least that hasbeen from my experience.


Another question

Some of these answers in external company exams, say gondwana instead of pangea, which one should we refer to.

Our teachers said to say Pangea, but Gondwana has been used alot . But isn't gondwana the souther mass continent, the Earth was broken into two, and Laurasia was the Norhern one?
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jasoN-

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Re: The Biological Question Thread
« Reply #49 on: October 01, 2010, 07:54:34 pm »
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Yeah thats how i've learnt it
Pangaea (super continent)
separates into:

Gondwana = southern (africa, antarctica, nz, aus, south america, india)
Laurasia = nortern (north america, europe, asia)
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Jdog

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Re: The Biological Question Thread
« Reply #50 on: October 01, 2010, 08:18:18 pm »
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cheers mate
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stonecold

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Re: The Biological Question Thread
« Reply #51 on: October 04, 2010, 04:20:51 pm »
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Do extranuclear genes include ribosomal RNA?
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lexitu

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Re: The Biological Question Thread
« Reply #52 on: October 04, 2010, 04:23:59 pm »
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Wouldn't think so. rRNA structure is determined by nuclear DNA anyway, right?
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Russ

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Re: The Biological Question Thread
« Reply #53 on: October 04, 2010, 04:32:52 pm »
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Quote from: stonecold on October 04, 2010, 04:20:51 pm
Do extranuclear genes include ribosomal RNA?

Not in eukaryotes. No idea about prokaryotes, can't remember last semester :P
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lexitu

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Re: The Biological Question Thread
« Reply #54 on: October 04, 2010, 04:36:42 pm »
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Well they can't have extranuclear genes if they don't have a nucleus... Or they would all be extranuclear.
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stonecold

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Re: The Biological Question Thread
« Reply #55 on: October 04, 2010, 04:50:28 pm »
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This is from CSE 2008 btw...

It is these two questions which are confusing me.  I know that the cytoplasm for a zygote comes from the mother, but I don't get why A is wrong for Q12.

And Q23, why doesn't disabling the apoptosis protein stop autoimmune diseases?

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lexitu

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Re: The Biological Question Thread
« Reply #56 on: October 04, 2010, 05:10:58 pm »
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Q12 - A is wrong because ribosomes do not carry genes. B is correct because the mt.DNA comes from the egg.

Q23 - The answer should be D. The immune system is not reliant on apoptosis for eliminating material it is recognising as non-self.
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Russ

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Re: The Biological Question Thread
« Reply #57 on: October 04, 2010, 05:21:02 pm »
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Quote from: aleitu1 on October 04, 2010, 04:36:42 pm
Well they can't have extranuclear genes if they don't have a nucleus... Or they would all be extranuclear.

Sleep deprivation is doing strange things to me, I associated extranuclear with plasmids for some weird reason.

I suppose it's worth noting that for q12, it's rare for male organelles to be transferred but it does happen
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lexitu

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Re: The Biological Question Thread
« Reply #58 on: October 04, 2010, 05:25:53 pm »
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Stop helping us and get some sleep Russ! :) Really, you help us too much.

Re. Q12 that's interesting to know. Love hearing things in Biology that make you realise that in life there are almost always exceptions and nothing is uniform.
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Russ

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Re: The Biological Question Thread
« Reply #59 on: October 04, 2010, 05:32:37 pm »
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I'll sleep after exams, plenty of time then right? Nah, I love biology, I'd teach it professionally if it was a realistic option for me.

Anyway, I had a poke around with rRNA and the mitochondrion and apparently it does encode part of it, specifically here
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