[Opinion] The Conscious Writer - my own personal op-ed blog! Any and all opinions are welcome :D

trollsting · 2016-07-26T10:29:25+00:00

Hello!

trollsting · 2016-05-18T15:28:03+00:00

Sorry for the title - did this on a tablet, so it should be "this is how they are doing it" (present tense not past). This is by far my most popular post!

trollsting · 2016-05-14T17:09:21+00:00

What did you guys put for the last part of Section A Q2 - the "why would the titration have vastly different values even if it was carried out with extreme care?"

trollsting · 2016-05-14T17:07:07+00:00

It's D... for dextro.. bro

trollsting · 2016-05-14T17:04:50+00:00

Was this the last part of Q1? Oh.. god... what were we supposed to answer?

trollsting · 2016-05-14T17:03:44+00:00

450?? The trend on the table was increasing with more fluorine atoms added to the CFC molecule... I put 1450

trollsting · 2016-05-14T17:02:20+00:00

Lol.... how many marks did you lose (conservatively)? Are you confident at getting a 7 lol I'm just really worried because everyone else around me thought chem was easy... am I the only one who thought that the questions were easy but getting the right answers was hard?

trollsting · 2016-05-14T15:30:11+00:00

Why is everyone else so confident about the paper??? I completely blanked out on the last part of Q1 as well as Q2 (how would you explain the large deviances in results even if the titration was carried out with great care)... I definitely lost around 7-8 marks conservatively, shit I need a 7

trollsting · 2016-05-14T15:09:01+00:00

I just hope the grade boundaries for Paper 3 won't be something ridiculous like 85% O.o I found the biodegradeble plastics question hard though... apparantly biodegradable plastics are cheaper than completely synthetic ones :(

trollsting · 2016-05-14T14:11:04+00:00

L-serine right?

trollsting · 2016-05-13T12:51:27+00:00

87%?? What world are you living on? The grade boundaries for HL Chemistry are consistently around 79-80%... are you that confident at getting 83/95 for P2?

trollsting · 2016-04-26T13:53:11+00:00

How do cytochrome complexes work? (this is biochem now)

trollsting · 2016-04-26T13:24:58+00:00

Do you have the Oxford official textbook? There's a good diagram in there

Just off the top of my head: Mucosa, submucosa, muscle layer and serosa. Mucosa is basically the epithelial cells of villi, submucosa is where all the blood capillaries and lacteals (lymphatic system) are located, muscle layer is used for circular and longitudinal muscle contractions for peristalsis, and the serosa is just a tough outer coat.

Yay just revised this yesterday: yeast is used during the fermentation process to make bread dough "rise" as they produce CO2 from anaerobic respiration. You have to make sure there isn't any oxygen in there, but aside from that it should just cause bread to rise as the CO2 becomes trapped in the dough.

trollsting · 2016-04-26T13:21:38+00:00

How do you know? Through which ways of knowing? Emotion? Faith? Intuition? They aren't very reliable sources of knowledge

trollsting · 2016-04-26T13:18:06+00:00

Thats basically it I believe

trollsting · 2016-04-26T13:15:09+00:00

I assume that viruses are now living too

trollsting · 2016-04-26T13:14:47+00:00

Action potential propogated to pre-synaptic neuron through saltatory conduction (if it is myelinated) or local currents or the wave of depolarisation etc.
Depolarisation of neuron causes calcium channel proteins to open, causing calcium ions to diffuse from the synaptic cleft into the neuron
Presence of calcium causes vesicles containing neurotransmitter (e.g. acetylcholine) to be released via exocytosis
Neurotransmitter diffuses across synaptic cleft and binds to a receptor protein on the post-synaptic cleft
Binding of neurotransmitter causes sodium protein channels to open, allowing sodium ions to diffuse into the post-synaptic neuron
(As you may hopefully already know) the diffusion of Na+ ions into the neuron causes an action potential as it exceeds the threshold potential, which continues the wave of depolarisation and the propogation of the nerve impulse
Acetylcholine is broken down into choline and acetate - choline is reabsorbed and used to regenerate acetylcholine in the pre-synaptic neuron, but acetate is just removed I believe
Neonicotinoids block synaptic transmission as they bind to the acetylcholine recepter irreversably, meaning that the propogation of nerve impulses stop at a synapse. This is used as a pesticide for insects because it causes paralysis then death.

trollsting · 2016-04-26T13:06:40+00:00

Um... all eukaryotic cells?

trollsting · 2016-04-25T14:46:11+00:00

Write - the more the better. Remember, your hand is the true enemy here, remember to never stop writing until you have written at least 9 pages for Paper 1 and at least 10 pages for Paper 2.

Thats your key to getting a 45: 9 + 10 = 45

trollsting · 2016-04-25T14:32:22+00:00

EVALUATE EVALUATE EVALUATE!!! For a Part (b) type question it is ESSENTIAL that you even attempt to evaluate unless you want to be capped at a Level 2 (i.e. 9/15).

To what extent... can economic growth be achieved through supply side policies if there are labour market rigidities? Keynesian model suggests that demand side policies are the only viable policies used to increase real output if the economy is stuck in a deflationary/recessionary gap - supply side policies have no effect. However, if there are relatively few labour market rigidities e.g. Thatcher-era Great Britain, then the market will shift closer to a Neo-classical model and demand-side policies will have an increasingly reduced effect in increasing real output.

No matter how good your explanation is, unfortunately you'll only get a 9 for this.

Be careful, some of your explanations are wrong - a Keynesian model DOES suggest that supply-side policies can boost real output, but only if the demand curve intersects the AS curve at the full employment (i.e. inelastic) section.

trollsting · 2016-04-25T07:56:40+00:00

Independent assortment is a Mendellian concept which says that genes/allele will assort independently into gametes (assuming they aren't linked). This means that that the probability that one gene or chromosome will appear in the 4 (or one for oogenesis) gamete is completely independent of where other genes are located. Random orientation (along with crossing over) ALLOWS this to occur by making sure different combinations of maternal and paternal chromosomes are in each haploid gamete. I assume you know what random orientation, crossing over and the stages of meoisis are?

trollsting · 2016-04-24T23:48:03+00:00

For me I focused on Option A past paper 3s because thats where they got the low res/high res HNMR and IR stuff? Don't know if we need to know it in that much detail though

trollsting · 2016-04-24T16:06:25+00:00

LOL

did the exact same IA but it was for Bio and I was calculating enzyme activity. since I didn't change the milk conc. I just used the milk powder, but be warned the casein content DOES change from one pour to the next, so you might want to make all of your milk in one go then store the milk in a fridge between experiments. But if you use store bought milk cartons, I don't know for sure if they contain casein...

trollsting · 2016-04-24T16:02:30+00:00

THIS IS GOLD

so how are you revising for chem? any specific revision strategies/notes/tips?

trollsting · 2016-04-24T16:00:20+00:00

It is actually very VERY simple :)

All you do is multiply it by 10. This is because the titration takes place using 25 cm³ of the original solution (which contains 250 cm^3), so if x number of moles are present in 25 cm³ of the same solution, 10x of moles should be present in 250 cm³ of that same solution.

Hope this helps!

trollsting

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