Peachgon Posted May 10, 2014 Report Share Posted May 10, 2014 So, what did you guys answer on the P1 question about environmental effects of the corn-borer toxin? I think I put something about the soil quality worsening, but I'm really not sure as I got that by cancelling all others out..i said other iorgnisms could get killedI also said that other insects could get killed but my friend pointed out that the other wild plants could be eaten. I asked my teacher and she said that the best answer would be the one refering to the biodiversity loss but for me all of them refered up to some point to biodiversity loss..Exactly, I thought the same thing about biodiversity! But insects getting killed sounds the most logical, as I guess corn-borers feed mainly on corn and wouldn't eat that much of other plants.. I'm guessing Reply Link to post Share on other sites More sharing options...
nitroglycerina Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was).II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question... Reply Link to post Share on other sites More sharing options...
Erasmusrasmus Posted May 10, 2014 Report Share Posted May 10, 2014 (edited) Yeah that question was tricky! I just reasoned it was free ribosomes because they produce proteins for use primarily within the cell (and sacromeres are inside the muscle cells I think). But I have no idea Edited May 10, 2014 by Erasmusrasmus 1 Reply Link to post Share on other sites More sharing options...
Guest Cshum327 Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was).II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question...I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulum 1 Reply Link to post Share on other sites More sharing options...
CaptainCook Posted May 10, 2014 Report Share Posted May 10, 2014 What about that electron micrograph, to label X, it was really hard to see... looked like it was pointing to the spaces in between. I said it was ribosomes on the RER i said it was the RER itself, now you're making me doubt my answer It's most definitely rER because the source of the picture was /RoughER.gif Reply Link to post Share on other sites More sharing options...
SeniorStatus14 Posted May 10, 2014 Report Share Posted May 10, 2014 That is TZ1, I put C as well, although it was pointing to the descending limb I imagine that they meant the loop of henle in general, which does increase the solute concentration in the tissues of the medulla I'm pretty confident this is correct, considering A was the glomerulus and that doesn't really fit as an answer! Thanks!! I honestly hate diagrams because I am the most un-visual person ever ha ha, but I still think I have a decent shot at a good grade, most of the questions I didn't know I was able to narrow down to 2 options giving me a 50-50 chance! Reply Link to post Share on other sites More sharing options...
CaptainCook Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was).II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question...I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulumI thought that sarcoplasmic reticulum mainly functions in storage of calcium ions but it's a good point though. Reply Link to post Share on other sites More sharing options...
patrick1996 Posted May 10, 2014 Report Share Posted May 10, 2014 That is TZ1, I put C as well, although it was pointing to the descending limb I imagine that they meant the loop of henle in general, which does increase the solute concentration in the tissues of the medulla I'm pretty confident this is correct, considering A was the glomerulus and that doesn't really fit as an answer! Thanks!! I honestly hate diagrams because I am the most un-visual person ever ha ha, but I still think I have a decent shot at a good grade, most of the questions I didn't know I was able to narrow down to 2 options giving me a 50-50 chance! I'm sure you did awesome! Reply Link to post Share on other sites More sharing options...
nitroglycerina Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was).II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question...I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulumI thought that sarcoplasmic reticulum mainly functions in storage of calcium ions but it's a good point though.I just checked for muscle cell structure and surprisingly in the muscle cells there are no endoplamis reticulums or golgi apparatuses so I think it is narrowed down only to sarcoplasmic reticulum.. Reply Link to post Share on other sites More sharing options...
Erasmusrasmus Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was).II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question...I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulumI thought that sarcoplasmic reticulum mainly functions in storage of calcium ions but it's a good point though.I'm not 100% sure but I don't think the sacroplasmic reticulum carries out protein synthesis Reply Link to post Share on other sites More sharing options...
Peachgon Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was). II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question... I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulum I thought that sarcoplasmic reticulum mainly functions in storage of calcium ions but it's a good point though. I'm not 100% sure but I don't think the sacroplasmic reticulum carries out protein synthesis I agree. And also, isn't is possible for other cells than muscle cells to produce actin for use within the muscle? Because in that case, endoplasmic reticulum sounds reasonable Reply Link to post Share on other sites More sharing options...
CaptainCook Posted May 10, 2014 Report Share Posted May 10, 2014 (edited) Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was).II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question...I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulumI thought that sarcoplasmic reticulum mainly functions in storage of calcium ions but it's a good point though.I just checked for muscle cell structure and surprisingly in the muscle cells there are no endoplamis reticulums or golgi apparatuses so I think it is narrowed down only to sarcoplasmic reticulum..I guess you're right, my books says "around each myofibril is a special type of endoplasmic reticulum, called sarcoplasmic reticulum", so it's analogous. Edited May 10, 2014 by CaptainCook Reply Link to post Share on other sites More sharing options...
nitroglycerina Posted May 10, 2014 Report Share Posted May 10, 2014 Was the actin one about where it was made? If it was that question I put free ribosomes as the answer (can't remember what letter that was). II know that some (quite big) part of my classmate chose endoplasmic reticulum (proteins for exocytosis) but some (including me) chose sarcoplasmic reticulum. While one of the best students in our class picked rough endoplasmic reticulum pointing that actin is a fibrous protein so i has mainly secondary sturcture and does not need any further modification so it will be just synthesised and then exocitosised. Anyway I'm confused with this question... I chose sarcoplasmic reticulum too cuz I think I read on ib.bioninja before that the muscle fibres have this layer called the sarcoplasmic reticulum instead of the endoplasmic reticulum I thought that sarcoplasmic reticulum mainly functions in storage of calcium ions but it's a good point though. I'm not 100% sure but I don't think the sacroplasmic reticulum carries out protein synthesis I agree. And also, isn't is possible for other cells than muscle cells to produce actin for use within the muscle? Because in that case, endoplasmic reticulum sounds reasonable Well, muscles cells are excpetion from the cell theory because they have multiple nuclei within one cell so I think it would be very difficult to synthesis such specific protein outsde the muscles. Plus the fact that actin is a monomere and undergoes polymerisation (normally it is globular protein but after polymerisation it becomes fibrous) after protein sythesis is quite an argument for sarcoplasmic reticulum. 1 Reply Link to post Share on other sites More sharing options...
han24 Posted May 10, 2014 Report Share Posted May 10, 2014 paper 3 on monday aaagh hate the ecology option Reply Link to post Share on other sites More sharing options...
BioNinja Posted May 10, 2014 Report Share Posted May 10, 2014 I thought Papers 1 and 2 (TZ2) were quite easy, so much SL stuff on paper 2! I can't believe they asked 2 variants of "calculate magnification". One thing I definitely got wrong was the Actin one, where is that produced? Reply Link to post Share on other sites More sharing options...
han24 Posted May 10, 2014 Report Share Posted May 10, 2014 i thought paper 2 was ok apart from the third graph, and paper 1 was a bit tricky Reply Link to post Share on other sites More sharing options...
han24 Posted May 10, 2014 Report Share Posted May 10, 2014 what was the answer to the question about this person who can feel but cant move their legs? i think i said part III was damaged Reply Link to post Share on other sites More sharing options...
nitroglycerina Posted May 10, 2014 Report Share Posted May 10, 2014 what was the answer to the question about this person who can feel but cant move their legs? i think i said part III was damagedonly the neuron between the brain and the muscle was damaged so I think you were right Reply Link to post Share on other sites More sharing options...
sameera95 Posted May 10, 2014 Report Share Posted May 10, 2014 what was the answer to the question about this person who can feel but cant move their legs? i think i said part III was damagedyeah same, if they can feel it then the sensory neuron from their skin won't be affected, but the motor neuron to the muscle is the one damaged because they can't move their leg Reply Link to post Share on other sites More sharing options...
sameera95 Posted May 10, 2014 Report Share Posted May 10, 2014 I thought Papers 1 and 2 (TZ2) were quite easy, so much SL stuff on paper 2! I can't believe they asked 2 variants of "calculate magnification". One thing I definitely got wrong was the Actin one, where is that produced? OMG i couldn't calculate it somehow i got a magnification of x 3,650,000 and for the measurement of the nucleus i got 8.6 micro meters. oh i put sarcoplasmic reticulum for actin production 1 Reply Link to post Share on other sites More sharing options...
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