ATAR Notes: Forum
VCE Stuff => VCE Exam Discussion 2021 => Topic started by: caffinatedloz on November 09, 2021, 01:36:23 pm
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So... what did we all think?
The real question is how saying Vitamin D isn't water soluble was worth three marks hahaha.
Also, the papaya question. What did we put?
I did two dot points:
- contains water which is needed for protein digestion as it is a hydrolysis reaction
- contains vitamins and minerals that can act as coenzymes speeding up the rate of digestion
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Got lots of mixed feelings about that exam... Don't think I did too bad but also don't think I did too well
VCAA really out here compensating for missing the food chem last year 😭
I said that papaya contains pepsin which aids digestion, which from research I think is one of the correct answers
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appr the vitamin d question was about oxidative rancidity :)
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Loved it, I think that was a perfect exam. Wasn't hard but there was room to seperate different levels of students.
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appr the vitamin d question was about oxidative rancidity :)
Does vitamin D oxidise well? I wouldn't think it'd be a great antioxidant but who knows, hopefully whatever I rambled about wins me a few marks.
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Well done to everyone who did the chem exam today! :)
So... what did we all think?
The real question is how saying Vitamin D isn't water soluble was worth three marks hahaha.
This. I talked about Vitamin D's structure and bonding and how it isn't water soluble, but I wasn't really certain about my answer.
Overall, the exam didn't go great for me because I ran out of time and didn't finish it.
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Overall, the exam didn't go great for me because I ran out of time and didn't finish it.
It was a very long exam, and those last eight marks required a lot of words. I definitely rushed the last bit! When they ask you to explain the importance of eating carbohydrates for runners in terms of GI and cellular respiration they've already given you half the answer so its twice as much work to get the marks.
At least it's over!!
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appr the vitamin d question was about oxidative rancidity :)
I said that Vitamin D will be lost because it will dissolve in water, because Vitamin D will not be impacted by heat, thus at higher temperature such as 100 degrees it can from intermolecular bonds with water, aka increased solubility in water at high temperatures. But I am not very smart, lol. :'(
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I said that Vitamin D will be lost because it will dissolve in water, because Vitamin D will not be impacted by heat, thus at higher temperature such as 100 degrees it can from intermolecular bonds with water, aka increased solubility in water at high temperatures. But I am not very smart, lol. :'(
In normal conditions it's for sure not soluble in water, but I said something along those lines as well. Something like "Due to Vitamin D's structure being largely non-polar, it is likely that the boiling water will have no effect on the vitamin D within the sweet potato. However, it is possible that the heat will lead to Vitamin D having some level of solubility in the water, thereby resulting in the Vitamin D content of the sweet potato dropping as it is boiled."
I'm really not too sure what they wanted, so I just tried to discuss it from a few angles.
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In normal conditions it's for sure not soluble in water, but I said something along those lines as well. Something like "Due to Vitamin D's structure being largely non-polar, it is likely that the boiling water will have no effect on the vitamin D within the sweet potato. However, it is possible that the heat will lead to Vitamin D having some level of solubility in the water, thereby resulting in the Vitamin D content of the sweet potato dropping as it is boiled."
I'm really not too sure what they wanted, so I just tried to discuss it from a few angles.
That sounds quite right.
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Is there literally no one else that talked about the double bonds in Vitamin D and how adding water under heated conditions would cause hydration and hence render the molecule to not Vitamin D?
That was quite a theory based exam :P
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good job guys for completing exam! and for the papaya question I talked about how there is enzymes that can digest the peptide with active site complementary to it and can catalyse the hydrolysis reaction. haha forgot to write about coenzymes so probs lost a mark so yeah
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does anyone have the suggested answers for multiple choice qns?
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good job guys for completing exam! and for the papaya question I talked about how there is enzymes that can digest the peptide with active site complementary to it and can catalyse the hydrolysis reaction. haha forgot to write about coenzymes so probs lost a mark so yeah
I reckon you'd be fine. There's no way they expect student to know what exactly is in the papaya, so as long as you said something like it contained enzyme or coenzymes to assist the hydrolysis of proteins you should probably get all the available marks, one or the other would be fine I'd imagine. It was only 2 marks right?
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It was only 2 marks right?
Yeah, thankfully it was only two!
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I reckon you'd be fine. There's no way they expect student to know what exactly is in the papaya, so as long as you said something like it contained enzyme or coenzymes to assist the hydrolysis of proteins you should probably get all the available marks, one or the other would be fine I'd imagine. It was only 2 marks right?
ok thanks mate!
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anybody got suggested solutions for this exam? if so pls send ;) ;)