Maybe there like certain extra steps that are taken for each type of response to be initiated but its just not part of our scope?

I searched it up and uhh bacteria can be both intracellular and extracellular so it does trigger the cell mediated as well

It probably just varies then. Thanks for the info!

Taaaa76 I don't think need to know it to that level; if we get a short answer question abt a specific adaptive immune response and its clear that it has invaded that cells, then u would talk about cell mediated by saying t helper cell releases a naive t cell then tallk about clonal expansion into cyotoxic and memory t cells and what they both do.

if its clear in the stem question that its extracellular then you can just say helper t cell selects a naive b cell which clonally expands into plasma and memory b cells and explain what they do.

so basically if you were to say in a short answer question that both are activated, tehn you would have to explain all the subsequent steps after activation of BOTH of them- which would probably take a while to write- but if you feel like you'll have enough time to write it then it should be fine and you probably won't get marks off.
I did a prac exam recently and i wasnt sure whether the pathogen was intra or extra cellular so i talked abt both cell mediated and humoral and the marking scheme showed it was fine but I didnt actually need to write both.

      prettypink1881 yes you don't need to know about it in detail. From memory, VCAA usually focuses on bacteria being extracellular, but many would still initiate the cell-mediated response because they can invade host cells. In reality, biology is a lot more complex haha. However, if you were asked to explain the third line of defence in relation to bacteria, I would usually just stick with the humoral response for sake of time and the marking scheme since all bacteria will definitely initiate this response.

        does anyone know if we are allowed to use pencil to draw flow charts, phylogenetic trees and any type of drawings on the exam?

          Lemonade_222 you can use pencil but it need to be quite dark (so it will show up on the scanned copies) and not a really smudgy lead (this will ruin your other pages). Pen is always best, but I did my whole exam in pencil and was absolutely fine. Unless the rules have changed since last year, I think you'll be okay.

            What is the dating period of potassium argon dating and uranium lead datin?

              @"Taaaa76"#p16146this is from my textbook, idk what the brackets for the uranium lead one is supposed to mean though.

              Uranium-235 – lead-207
              dating period:1 million – 4.5 billion years (used together with U-238 – Pb-206 dating)

              Potassium-40 – argon-40
              dating period: 100 000 + years

                Taaaa76
                Potassium-argon

                • half-life of Potassium-40: 1 300 000 000 years

                • useful in the range from 0.5 million years and older

                Uranium-lead

                • half-life of Uranium-235: 710 000 000 years

                • useful in the range from 10 million years and older

                I got this from the Jacaranda textbook.

                  You too! Hope we all do well

                  does anyone have TSSM 2022 units 3 and 4 trial exam solutions?
                  I did the exam but I don't have the solutions for it

                                https://publuu.com/flip-book/280215/655032

                    i'm not sure if this works, I used an online converter

                      Hey y'all I just have a couple of last-minute Biology questions haha!

                      1. What extent of detail is required for the Attenuation regulation process? I've spent time in class looking at the specific leader regions (2,3 and 4) involved in the different hairpins but in some VCAA reports that level of detail isn't included (just wanted to double-check
                      2. What is the last dot point all about (Migration of Aboriginals/Indigenous populations)? My class didn't actually cover this so I'm a little confused!

                        do you think its ok to talk about continental drift when its about human migration eg why is there fossils of neanderthals in Australia or something like that? i remember learning about it but every time I answer a question they never talk about continental drift

                        GeorgeOfTheJungle for question 2 did you mean "ways of using fossil and DNA evidence (mtDNA and whole genomes) to explain the migration
                        of modern human populations around the world, including the migration of Aboriginal and
                        Torres Strait Islander populations and their connection to Country and Place."?
                        i think this is talking about the important place in Australia for Aboriginal and Torre Strait Islanders eg Lake Mungo as a sign of cultural evolution with the burial site and devils lair with bone points and bead artefacts