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VCE Biology Question Thread
valjaybj :
--- Quote from: Amadas_ on May 19, 2022, 06:11:21 pm ---Hey :)
Would I be able to know what are the inputs and outputs that I have to know for glycolysis, Kreb cycle, and electron transport chain?
I use the edrolo textbook and the textbook has different ones from the edrolo videos, I'm not sure which one to go by?
Thankss!
--- End quote ---
hey, for sure!
Inputs:
Glycolysis - glucose, ADP + Pi, NAD
Krebs - pyruvate / acetyl coa (vcaa accepts both answers here; if you've learned about the linking reaction then feel free to say acetyl coa, but if you haven't then pyruvate is still correct (and in most examination reports vcaa uses pyruvate as the answer), NAD, FAD, ADP + Pi
ETC - NADH, FADH2, oxygen
Outputs:
Glycolysis - 2 pyruvates, NADH, 2 ATP
Krebs - 2ATP, CO2, NADH, FADH2
ETC - NAD, FAD, H2O, 26-28 ATP (vcaa has specified for the new study design, the number of ATP made in the ETC is 26-28 so stick to these numbers!)
Hope this helps! :)
tiredandstressed:
--- Quote from: valjaybj on May 22, 2022, 01:37:16 pm ---hey does anyone know where i can find answers to the short answer section of the 2022 sample exam? thanks :)
--- End quote ---
VCCA typically does not release solutions to the SAQ section of a sample exam.
Maybe ask your teacher - typically they will write up their own answers to these questions (as well some external companies may also write up solutions) - however these would only be sample answers not affiliated with VCCA
valjaybj :
--- Quote from: tiredandstressed on May 23, 2022, 10:32:44 am ---VCCA typically does not release solutions to the SAQ section of a sample exam.
Maybe ask your teacher - typically they will write up their own answers to these questions (as well some external companies may also write up solutions) - however these would only be sample answers not affiliated with VCCA
--- End quote ---
yeah im just looking for any sort of sample answers. if anyone finds some could you drop a link below? cheers
elfy:
--- Quote from: valjaybj on May 22, 2022, 01:43:38 pm ---hey, for sure!
Inputs:
Glycolysis - glucose, ADP + Pi, NAD
Krebs - pyruvate / acetyl coa (vcaa accepts both answers here; if you've learned about the linking reaction then feel free to say acetyl coa, but if you haven't then pyruvate is still correct (and in most examination reports vcaa uses pyruvate as the answer), NAD, FAD, ADP + Pi
ETC - NADH, FADH2, oxygen
Outputs:
Glycolysis - 2 pyruvates, NADH, 2 ATP
Krebs - 2ATP, CO2, NADH, FADH2
ETC - NAD, FAD, H2O, 26-28 ATP (vcaa has specified for the new study design, the number of ATP made in the ETC is 26-28 so stick to these numbers!)
Hope this helps! :)
--- End quote ---
hey I was wondering if I need to know the exact number of molecules in photosynthesis and cellular respiration and anything other than the inputs and outputs and stages of all the stages.
RaspberryTau:
--- Quote from: elfy on May 29, 2022, 04:27:15 pm ---
hey I was wondering if I need to know the exact number of molecules in photosynthesis and cellular respiration and anything other than the inputs and outputs and stages of all the stages.
--- End quote ---
According to the study design:
Photosynthesis as an example of biochemical pathways
· inputs, outputs and locations of the light dependent and light independent stages of photosynthesis in C3 plants (details of biochemical pathway mechanisms are not required)
· the role of Rubisco in photosynthesis, including adaptations of C3, C4 and CAM plants to maximise the efficiency of photosynthesis
· the factors that affect the rate of photosynthesis: light availability, water availability, temperature and carbon dioxide concentration
Cellular respiration as an example of biochemical pathways
· the main inputs, outputs and locations of glycolysis, Krebs Cycle and electron transport chain including ATP yield (details of biochemical pathway mechanisms are not required)
· the location, inputs and the difference in outputs of anaerobic fermentation in animals and yeasts
· the factors that affect the rate of cellular respiration: temperature, glucose availability and oxygen concentration
I am not that familiar with the updated one... but for the old study-design: we had to know that (eg for aerobic respiration) 1 glucose --> 2 ATP + 2 Pyruvate (glycolysis) --> Krebs cycle ....--> ETC ..... and so on.
So I'd say, u should know the inputs/outputs for each stage (ESPECIALLY ATP YIELD). I think Douchy had a good video explaining it. From checking just now, he's uploaded a bunch more that might be more relevant (eg. https://www.youtube.com/watch?v=th2wwzBNQ1I). Would 100% recommend his podcast as well. (Douchy's Biology)
Hope this helps!
:)
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