I really need help.
This is my 10 prac exam I believe, and I am not improving at all, I think I'm getting worse.
If anyone has advice on how to improve, what to look for in a question, just anything.
And just go over my marking and see what you think. I didn't include any multiple choice, and I crossed some of the questions that weren't relevant.
This is the VCAA 2009 exam 2.
Thank you.
https://www.dropbox.com/s/3wrtyqcrvzxg9r2/Help.pdf?dl=0
I really need help.Welcome to the forums!
This is my 10 prac exam I believe, and I am not improving at all, I think I'm getting worse.
If anyone has advice on how to improve, what to look for in a question, just anything.
And just go over my marking and see what you think. I didn't include any multiple choice, and I crossed some of the questions that weren't relevant.
This is the VCAA 2009 exam 2.
Thank you.
https://www.dropbox.com/s/3wrtyqcrvzxg9r2/Help.pdf?dl=0
Attached are some corrections. Note: I only looked at questions where you gave yourself marks. Let me know if you have any questions
Welcome to the forums!haha, thank you.
Good luck!
1b - This isn't entirely irrelevant, however many of the suggested answers aren't things you'd be expected to know anymore, which makes it difficult to answer. Your answer is fine given the changes to the study design.THANK YOU! This is amazing feedback, I really appreciate it! I'll take what you said for question 9cii into account, that was a really helpful answer.
2aii. You're right, this isn't in the study design. All you're expected to know is that neurotransmitters are released from one neuron, diffuse across the synapse, and attach to another.
5b. Your answer is correct, but probably not the best cell to pick because you ended talking about antigen presentation which is part of specific immunity.
6c. This isn't really in the study design anymore. You need to know what translocation mutations are, but this question is more about meiosis.
7c. Don't worry about this question. The suggested answer that VCAA gives is fairly useless and not something that you should be expected to work out.
9cii. You've wasted too much of your space talking about divergence, common ancestors, and naming species indiviudally.
You need to group them by how many differences they have e.g. C, A, & D all have thick limb bones and so are more closely related to each other than they are to B which has thin limb bones. A & D both have thick inner ear bones and so are more closely related to each other than they are to C which has thin inner ear bones.
10aii. Your answer is longer than needed, but correct.
10b. This is also correct, you could shorten it by not mentioning the predators (you can just say they had a selective advantage due to being faster and growing quicker).
11b. This isn't specifically in the study design, however it could come under this dot pointIt's possible that you could get a question like this on the exam.Spoilerthe human fossil record as an example of a classification scheme that is open to interpretations that are contested, refined or replaced when new evidence challenges them or when a new model has greater explanatory power, including whether Homo sapiens and Homo neanderthalensis interbred and the placement of the Denisovans into the Homo evolutionary tree.
fwiw no one gets 100% on vcaa exams (well, some people do, but not many). Assuming you're getting all or almost all of the multiple choice correct, then you're on the border of A/A+ here.
This is my 2017 vcaa sample exam. I'm not entirely sure if my solutions are correct, I've checked with my teachers (corrections are in red pen/blue pen) but I just wanted to confirm a few questions, especially the experimental design ones.This has been marked well. I don't see any issues with the corrections that have been added.
I'm not too sure how harsh i mark myself too so yeah.
Cheers
https://www.dropbox.com/s/l8ufgcn2qzapbo5/new%20doc%202019-10-23%2022.14.57-20191023222614.pdf?dl=0
Just finished the 2017 VCAA exam and I am a bit unsure about some of my responses, so any feedback would be amazing! In particular, I am unsure of my responses to questions 4c and e, 7a, 8, 9a, 10b and 11d. Apologies in advance for my handwriting, it's a lil bit of a mess1c. The golgi apparatus does alter proteins a bit, but you're not really taught that in VCE so it's possible it wouldn't be accepted.
Thanks heaps!
https://www.dropbox.com/sh/5cq5zfy2wx1keyd/AACk_iFbGWLlCCIhM9duXqURa?dl=0
1c. The golgi apparatus does alter proteins a bit, but you're not really taught that in VCE so it's possible it wouldn't be accepted.
4c. You've included 2 extra lines at the bottom of the given space which is a pretty good indication that you've written too much. You need to pay attention to how the question is worded - it asks how this form of immunity is beneficial - it doesn't ask why it's beneficial, which is what you've talked about in too much depth by discussing how long it takes for their own immune system to develop. You've then talked a bit about how specific immunity works so it sounds like you didn't really understand what the question wanted. It was worth 3 marks - the marks would have been for saying that it's passive, provides antibodies, and that the joeys own immune system was underdeveloped/insufficient.
4e. Your answer is *almost* detailed enough to get the mark, vcaa did say that they accepted similar answers if good understanding was shown. Your answer was too broad - you don't necessarily need testing to turn that antibiotic into a drug, but you do need testing to turn it into a safe drug.
7a. Probably not the best examples to use - these are both things associated with bipedalism - both homo and Australopithecus were bipedal. Although it's likely that these things were comparatively better adapted for bipedal motion in homo than in Australopithecus, there are other features that would have shown greater difference.
7b. As well as mentioning that homo species appeared prior to 900 000 years prior, you should also mention that australopithicus species had entirely disappeared by then.
8a. Not necessarily before symptoms appear - some genetic conditions have symptoms present at birth. Would be better to say provides information on any genetic conditions the baby has and therefore allows for treatment/prevention.
8b. Your first point is correct, your second point is more of a social implication than an ethical one (although the line between them is quite blurry).
9a. Given it says "in the context given", saying bacteria rather than cell is fine. Your answer is correct.
9bi. You've written too much again, there's no need to restate the stem - you could get rid of most of that first line and just start with "They cut the plasmid..."
You don't need to talk about DNA ligase. You would have just about got the mark just from your first dot point - you just need to add a few more words to say that cutting them with the same enzyme means that the human gene can be inserted.
9bii. Your diagram should look exactly like the one given previously, just with the human gene inserted where the BamH1 recognition site was, and with a BamH1 recognition site at either end of the human gene.
10a. You've got the right idea but you need to be more specific to the scenario eg. say what damage the fire might have done specifically rather than just saying that it damaged the environment (e.g. damaged habitat/resulted in loss of prey).
10b. Your answers for this are fine - too long, but you've included the important information.
11c. Careful with your accuracy/validity. Accuracy is about how close a measurement is to the true value - this part had nothing to do with accuracy, only validity.
11d. What you've written in black isn't really a control - it's a way to improve accuracy, controls are normally about improving validity.
What you've written in blue is correct.
Hey this me again, this time its the 2018 nht exam. There's a lot of question I'm unsure about even though I looked at the solutions, I feel like the marking scheme of the assessor's report for nht is a bit off. The marks that I haven't circled in red means that I'm unsure if my answer would suffice any marks at all. Overall, I felt like i did pretty poorly on this exam and I'm not sure if normal VCAA bio exams would be this 'hard', any help would be appreciated :)2b. I think you'd get at least one mark for this.The part you haven't really addressed is the bit about eliminating the infection - just saying that B cells/antibodies can't be produced doesn't really explain why the infection can't be eliminated.
https://www.dropbox.com/s/4pizdgebvxkmohg/new%20doc%202019-10-26%2017.16.22-20191026172347.pdf?dl=0
This is my 2017 vcaa exam. I put red question marks next to the questions that I don't know if i should receive marks or not. I also took into consideration of writing in the box too haha.2d. You've explained why the signalling molecule might be present and concluded that its presence mean the caterpillars prefer mature leaves - the question is asking about the effect of the signalling molecule - and specifically the effect on the cells of the young leaves, which you haven't answered.
https://www.dropbox.com/s/g7l3w77981cermu/new%20doc%202019-10-27%2014.49.44-20191027145712.pdf?dl=0
Hi, could someone please check my marking of the vaca 2018 practice exam? This is my first post so hopefully I've done this right! I wrote down most of the VCAA answers however I wasn't sure how many marks to award myself for each question. So if someone could please tell me how many marks each one is worth that would be amazing! Thanks!1a. For your second line, call it a ribosome, not rRNA (a ribosome is made up of both rRNA and protein). Also mRNA has codons not triplets - triplets are on DNA.
https://www.dropbox.com/s/fcfcsuixxmsrs9z/Scan%20Mietta%2010.pdf?dl=0
It's me again!
Guess what, i'm still not improving.
I know what the questions were, but for some reason, I either didn't know how to answer them, left a thing or two out, misinterpreted the question....
I would take any advice you can give me. I am kind of desperate.
Thank you!
2018 NH VCAA exam
https://www.dropbox.com/s/y62b8pnvh4jxrd7/2018%20NH%20VCAA%20Exam.pdf?dl=0
1a. For your second line, call it a ribosome, not rRNA (a ribosome is made up of both rRNA and protein). Also mRNA has codons not triplets - triplets are on DNA.
You can get rid of the last line entirely - there are other steps that happen after translation for tryptase to form. Replace it with something like "when the ribosome reaches a stop codon, translation ends and the polypeptide is released."
4c. Don't call the toxin a pathogen. A pathogen is a disease causing agent - this doesn't cause disease.
6b. You've just repeated information given in the stem of the question for this. Make sure you're actually providing new information.
7a. A gene being recessive isn't the only reason it wouldn't be present in the whole population. You should probably have worded this differently - eg. saying that individuals can carry a gene and pass it down to their offspring without that gene effecting their own phenotype.
8b. The bit about preventing the DNA production of folic acid is a bit confusing - you should have said that the lack of active folic acid reduces dna production which slows cell growth because cell growth requires dna production.
8c. You only need to include one of the answers (either not suitable with reason or maybe suitable with reason), not both. You don't need to explain when an autoimmune disease occurs - just need to say that it is autoimmune and therefore antibiotics wouldn't work because they only work on bacteria.
10c. Reduced genetic diversity may have been accepted but you'd probably have to be more specific. eg. reduced genetic diversity of rice due to this strain becoming prevalent. Even then, there isn't heaps of diversity to farmed rice anyway because it's undergone artificial selection.
11b. Time is part of the dependent variable so it's not controlled.
11d. The hypothesis is that the red algal balls will photosynthesis faster than the green ones - so results contradictory to this would refute the hypothesis, either the green balls photosynthesising faster or at equal rate to the red balls.
11e. It's a negative control (a positive control would be white light). It's not about being able to compare them - it's to make sure the results are valid (that the colour change is actually due to photosynthesis).
For the questions I haven't commented on, your own corrections are fine. Your marking is also fine for the most part (whether some of your answers were accepted may have depended on the examiner/you may have gotten the mark from one examiner but not both).