“Nerve pumps are facilitated by Na+/K+ pumps on the membrane of the neuron” is this kinda like a transport protein for swapping potassium and sodium ions across the membrane??
You don't need to know that much detail with the sodium potassium pump, but sodium goes in and potassium comes out, allowing for action potential to move across neuron.
1.^somebody check tho cause I don't think im 100% right
So capillaries becoming permeable and leaked causes swelling, true?
- that indirectly causes swelling
2.- the swelling is due to the increased blood flow as a result of these capillaries becoming more permeable
Is synthesis of DNA relevant for the 2018 exam??
3.Nup. Just know that it involves DNA polymerase.
1. For bio you don't need to know anything about how they work (I think they used to be on the study design though), just need to recognise whether something is active or passive transport by whether it uses ATP.
2. The increased blood flow is due to vasodilation, the increase in permeability is what makes them 'leaky', it doesn't really increase blood flow though.
3. Don't even need to know that much.
Hi,
So I have been just done the 2016 VCAA exam and came across this question (2) (attached). For part c, it asks for us to design an experiment. With these questions, is it best to write out a method, or just identify components like the IV and DV and basic experimental set-up as the answers seem to identify (also attached).
Thanks!
Nah, it's testing experimental design not method. Experimental design is the way an experiment is setup, not the way it's run (if that distinction makes any sense). So it just wants to know how you would set up the experiment as well as the DV and IV. The second and third dot points on the answers are the 'setup' part of it.
1. I understand that lysozymes break down the bacterial cell wall, but how does this affect the bacterial cell?
Could this be an appropriate answer?
- results in cell integrity being affected, as there is no cell wall to limit expansion of bacterial cell
- thus, disrupts cell ability to function properly
- resulting in death of bacteria
1. I'd just say that it stops the bacteria from controlling what can enter/exit the cell, which is necessary for survival. Without this ability, it dies.
Is it worth doing the sample exams? They don’t have answers for short answer
Vox wrote solutions to the 2017 one
here