HSC Biology Question Thread

[Elenaa]

Hi!
Just wondering, roughly how long should we be spending on each section of the bio paper?

Thanks!

[Skidous]

Hi!
Just wondering, roughly how long should we be spending on each section of the bio paper?

Thanks!

In an exam the paper will say how long on each section
For section 1
Multiple choice should be 25minutes
Short Answers should be 1hr40minutes
For Section 2 (Option Topic)
45 minutes should be allotted

[christopherk8]

hi could someone please answer this question that is really confusing me......
is hybridisation (e.g. CSIRO Mandarins created from Ellendale Tangor and Imperial mandarins) the same this as selective breeding (Mating Freisian Cows with Jersey cows to get the best combination)?
thanks

[Skidous]

hi could someone please answer this question that is really confusing me......
is hybridisation (e.g. CSIRO Mandarins created from Ellendale Tangor and Imperial mandarins) the same this as selective breeding (Mating Freisian Cows with Jersey cows to get the best combination)?
thanks

No, Hybridisation is the artificial pollination between different specifies to produce a new species with favourable traits from both

Selective Breeding just takes 2 organisms from the same species to produce another organism with favourable traits

Hope this helps

[lha]

So unless it asks for a line of best fit, we just do a normal line connecting the points?

And i meant, does the line of best fit have to pass through as many points as possible? Or does jithave to have equal amount of points on top and below the line? Etc.

[Gregs]

Has anyone seen any questions about the timeline on malaria or anything where we need to know the history of malaria? Do we even need to know it?

[Skidous]

So unless it asks for a line of best fit, we just do a normal line connecting the points?

And i meant, does the line of best fit have to pass through as many points as possible? Or does jithave to have equal amount of points on top and below the line? Etc.

It has to pass through as many points as possible and it should ALWAYS be a line/curve of best fit

You are allowed to draw the line of best fit and the connected points on the same graph

[Skidous]

Has anyone seen any questions about the timeline on malaria or anything where we need to know the history of malaria? Do we even need to know it?

I have seen questions on the history of malaria but you could be asked a question on the change of nature and direction of scientific thinking and use it as well

Since it is a dot point in the syllabus you have to know It as they can ask a question from any part of the syllabus

[lha]

So even if it doesnt ask for a line of best fit, we draw the normal connected dots graph AND a line of best fit?

Do we label it as line of best fit or not?

And does the line of best fit start at the first point and end at the last point?

[Skidous]

So even if it doesnt ask for a line of best fit, we draw the normal connected dots graph AND a line of best fit?

Do we label it as line of best fit or not?

And does the line of best fit start at the first point and end at the last point?

Yes

If you do label it you need a key

And it stars at your first point and ends at the end of the graph (not necessarily your last point )

[imtrying]

if asked a question about models for enzyme specificity, would I just talk about the induced fit model because its the more correct one or would I need to mention the lock and key as well?

[Skidous]

if asked a question about models for enzyme specificity, would I just talk about the induced fit model because its the more correct one or would I need to mention the lock and key as well?

If it asked about just a model then use induced fit but if it asks about the change in models then you need to refer to both

[imtrying]

Just checking if my info in my notes is right - oxygen is carried 95% in oxyhaemoglobin? I don't know if this is the same as just haemoglobin or not oops

[Skidous]

Just checking if my info in my notes is right - oxygen is carried 95% in oxyhaemoglobin? I don't know if this is the same as just haemoglobin or not oops

Yes, oxyhaemoglobin is the molecule that carries oxygen in blood (it's just the molecule created when oxygen bonds to haemoglobin)

[imtrying]

Yes, oxyhaemoglobin is the molecule that carries oxygen in blood (it's just the molecule created when oxygen bonds to haemoglobin)

Thanks!