The Biological Question Thread

[cypriottiger]

its true, they expect us to be able to recite all this knowledge, yet they themselves are incapable. the amount of times i went to the front of class to explain a concept my teacher couldn't....
not that he didn't know, but he couldn't paraphrase and explain it in such a manner that was comprehendable to people who were struggling to grasp the ideologies of the concept.
(sorry for long words, but the exam is coming up and feel as though practise makes perfect

[stonecold]

exactly.  if they are teaching the content, they should have no problem doing the exam.  i would feel bad for the 10% of good teachers who wouldn't really deserve it because they do their job properly, but I doubt it would be an issue for them, because they would know their stuff and have nothing to worry about.

so many teachers would get found out...

[sillysmile]

exactly.  if they are teaching the content, they should have no problem doing the exam.  i would feel bad for the 10% of good teachers who wouldn't really deserve it because they do their job properly, but I doubt it would be an issue for them, because they would know their stuff and have nothing to worry about.

so many teachers would get found out...

hahaha, they would be exposed as witches and burnt at the stake!
but then there would not be enough teachers left..

[Russ]

I think the problem here isn't really with the teachers, more to do with the fact that teaching has a bad reputation, a low pay:effort ratio and a lot of hidden requirements.

It certainly does attract some brilliant professionals but they invariably get paid off by private schools, so the government is forced to offer incentives to uni graduates to do a DipEd and start teaching (that six week intensive course that made headlines earlier this year).

[stonecold]

What is meant by the diploid chromosome number?

I got this wrong on VCAA 2004

Also, what exactly is an index fossil, and what features does it need to possess?

Thanks.

[cypriottiger]

What is meant by the diploid chromosome number?

I got this wrong on VCAA 2004

Also, what exactly is an index fossil, and what features does it need to possess?

Thanks.

yea the wording cost me a mark too. diplod number refers to the nuber of chromosomes, so normally 46, but in my question i had nondisjunction occuring (so 47) so be aware of those tricks they might pull.

index fossil/transitional fossil/indicator fossil is sort of the standard upon which unknown fossils are compared. by having that index fossil at a known age of eg. 45 mya, and then a newly discovered, same fossil found at a different location can be presumed to have the same age.

[masonnnn]

hey guys, been getting my head back around the confusion of sister chromatids and chromosomes etc and came up with a question,

when a chromosome is single stranded this is equal to one molecule of dna,
when the chromosome is double stranded (so contains two sister chromatids) is this still one molecule of dna, or two?
thanks in advance

[matt123]

hey guys, been getting my head back around the confusion of sister chromatids and chromosomes etc and came up with a question,

when a chromosome is single stranded this is equal to one molecule of dna,
when the chromosome is double stranded (so contains two sister chromatids) is this still one molecule of dna, or two?
thanks in advance

Shud be 2 I think.
im no bio expert

But I think .. every chromatid consist of 1 molecule of Dna.

[cypriottiger]

hey guys, been getting my head back around the confusion of sister chromatids and chromosomes etc and came up with a question,

when a chromosome is single stranded this is equal to one molecule of dna,
when the chromosome is double stranded (so contains two sister chromatids) is this still one molecule of dna, or two?
thanks in advance

Shud be 2 I think.
im no bio expert

But I think .. every chromatid consist of 1 molecule of Dna.

yep is two
they are both connected at the centromere but remain as separate strands

[masonnnn]

thanks!
such a minor thing yet there's still been questions on this... one problem with bio, you need an understanding of every minor detail aha.

[akira88]

Do restriction enzymes cut through covalent bonds? :S

[Russ]

It cuts the phosphodiester bond, so yes.

[onerealsmartass]

It cuts the phosphodiester bond, so yes.

so what would be the best answer if they ask what is the name of the bond between the sugar and phospahte?
would it be covalent bond or phosphodiester?

[akira88]

It cuts the phosphodiester bond, so yes.

Lol I completely forgot unit 3 chemistry

[Russ]

It cuts the phosphodiester bond, so yes.

so what would be the best answer if they ask what is the name of the bond between the sugar and phospahte?
would it be covalent bond or phosphodiester?

Covalent is just a type of bond, if they specifically ask for the name then I would put phospodiester