HSC Biology Question Thread

[Blissfulmelodii]

No they're different

Comparative DNA sequencing does not include the combination of DNA Strands, just looking at the differences in the sequencing themselves. So I just looks at the base pairs

Oh okay so how is that used in biochemistry as evidence for evolution?

[nibblez16]

Hello, can you please explain the answer to this question. The answer is D.
 

[Skidous]

Oh okay so how is that used in biochemistry as evidence for evolution?

Is biochemistry an option or is it a technology

As a technology if the sequenced chemicals are similar then that shows that they will exhibit similar traits and thus show evolutionary links between organisms

[Skidous]

Hello, can you please explain the answer to this question. The answer is D.
 

Hey
So the reason it's D is because the movement of ions is AGAINST the concentration gradient (should be high to low concentrations when this one goes from low to high) which requires energy, hence it's active transport

[Blissfulmelodii]

Is biochemistry an option or is it a technology

As a technology if the sequenced chemicals are similar then that shows that they will exhibit similar traits and thus show evolutionary links between organisms

Okay thanks. Biochemistry is a branch of scientific study which is used to support evolution, so DNA sequencing would be a technology.
Thanks again!

[Skidous]

Okay thanks. Biochemistry is a branch of scientific study which is used to support evolution, so DNA sequencing would be a technology.
Thanks again!

I know it's the technology just weren't sure if it was an option topic

[Elenaa]

Hi!
So i'm kinda confused on the concept of DNA replication. I don't get why it happens in meiosis, i know its for heredity and for genetic information to be passed on, but i don't understand the concept behind it, like all the chromosome and chromatid stuff.
Thanks

[nibblez16]

Hey
So the reason it's D is because the movement of ions is AGAINST the concentration gradient (should be high to low concentrations when this one goes from low to high) which requires energy, hence it's active transport

Thank You! I got a little confused with osmosis and active transport

[Skidous]

Hi!
So i'm kinda confused on the concept of DNA replication. I don't get why it happens in meiosis, i know its for heredity and for genetic information to be passed on, but i don't understand the concept behind it, like all the chromosome and chromatid stuff.
Thanks

Chromatids contain DNA and Chromosomes are comprised of 2 chromatids joined at the centromere

When a cell replicates it needs a copy of DNA in order to stay alive and perform respiration

In meiosis it needs half that copy of that DNA to allow the genetic information from one person to be passed into future generations and stuff like that

[katnisschung]

Hi everyone
looking for hsc biology past papers organised by questions according to the topics
i know there are some available online but would anyone have just a list?

thanks

[Skidous]

Hi everyone
looking for hsc biology past papers organised by questions according to the topics
i know there are some available online but would anyone have just a list?

thanks

I don't think you can find them organised by biology topics as in the HSC they appear in random order so you're better off practising papers like that.

If you need a collection of past papers you can go to Board of Studies or aceHSC.net and there will be past papers there

[Blissfulmelodii]

I know it's the technology just weren't sure if it was an option topic

ohh no it comes under Blueprint of Life

[Skidous]

ohh no it comes under Blueprint of Life

Yeah i know it does just wanted to clarify

[Blissfulmelodii]

Yeah i know it does just wanted to clarify

all good. Thanks for your help!!!

[Gregs]

Whats stopping BOSTES from asking a question worth more than 8 marks???