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Edexcel A2 Biology Unit 5 (6BIO5) - 22/06/2011- OFFICIAL THREAD !

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Reply 4180

iesians

im at a payphone !!.............
*feeling random after all studying*

Reply 4181

iesians

Original post by nadzzdan

My bet on the topics covered are HEART, ACTION POTENTIALS and SYNAPSES, GMO's and SPIROMETER

tell me 5 advantages and disadvantages of using GMO's ? (10 marks lol)

Reply 4182

SimpleGirl

Original post by BastardOranges

But CAT scans are able to produce 3-D images, they just take lots of 2-D 'slices', which can are used to produce the 3-D image.

It'd be better to compare them on the basis that CAT scans are able to investigate structure, whereas PET investigates function (using a radioactive tracer).

Ah, okay, thanks :h:

Reply 4183

SimpleGirl

Original post by iesians

find a perosn to do experiment on ! lol
put mouthpeice in his mouth and advise him to breathe calmly for a secong just throguh the mouthpirce to acclimatise him to breathing in this situation
-apply a noseclip on him
-fill up the chamber with oxygen
-start the rotating drum on which spirometer trace will be amde.
-calibrate the spirometer trace to read off volume values correctly.
-attach the mouthpeice hose to the chamber and advise the volunteer to breathe in and out calmly for about a minute.
-then advise him to exhale as deeply as possible followed by max inhalation.
-all of this breathing activitiy will be recorded on the trace.
once done, detach the mouthpiese and read off tidal volume and vital capacity form the spirometer trace.

.........
OH YEAH ! also use a soda lime box to remove CO2 from exhaled air. if you do this youll see a gradula decline in the trace!! gradient of this decline will give you the rate of oxygen uptake !

Thank you! :h:

Original post by iesians

im at a payphone !!.............
*feeling random after all studying*

...trying to call home, all of my change I spent on you :rolleyes:

Reply 4184

sixthformstudent

[LIST]
Hi guys,

I really need help regarding my grades.
For both courseworks I got A's.
Unit 1: mid C
Unit 2: high C
Unit 4: C
Unit 5:?

What do you reckon I'd need in tomorrows exam to get a D or a C overal. This is a very tricky exam and I really don't have high hopes for it. Please help!

Reply 4185

ZTSR

I reckon, Muscle contraction & Respiration, Heart Exercise & Homoeostasis, with Drugs & Action potentials.

Reply 4186

EmmaSaysRarr

you should only need a D or an E to get a C or a D because of the C's and A's in coursework and exams :smile:

Reply 4187

nadzzdan

Original post by iesians

tell me 5 advantages and disadvantages of using GMO's ? (10 marks lol)

Advantages
-Enables humans to minimise time for crops produced. GMPs which usually grow in a year grow within a couple of months.
-Crops have a higher yield and have more nutrients.
-it can be a cheaper way of pharming (drug production) by insertion of desired genes into plasmids of bacteria.
-allows scientists too experiment with genetic engineering and production of artificial human parts. Like the picture of a mouse and a human ear (look that up).
-medicine can be given in the form of a paste than tablets by grinding the plant with the drug gene and using it as medicine.

Disadvantages
-Some say its like playing God.
-Unethical to use animals for our benefit because it causes pain and distress.
-genetically modified crop may seem a good idea now but there might be hidden consequences.
-plants and fruits that are resisitant to some types of antibiotics, when eaten, may pass this gene on to bacteria in the body creating 'superbugs'.
-plants that may accidently cross breed with other plants may mean that we have drugs in the plants which we may not know of so they may lead to some harmful side effects.
-Genetically modified animals are only 1% successful so a lot embryos are destroyed and this may be seen as murder. :biggrin:

Oooops i gave you 6 never mind... lol (i am biased though)

(edited 11 years ago)

Reply 4188

sixthformstudent

Original post by EmmaSaysRarr

you should only need a D or an E to get a C or a D because of the C's and A's in coursework and exams :smile:

Ahh thats made me feel a whole lot better, thank you :smile:

Reply 4189

user3456

Elements of the spirometer and habituation came in june '11 paper...
I'd say MEDULLA functions, Keyhole surgery/Prostheses, Performance enhancing drugs, Action potential, Refractory period, Myelinated neurones, Brain scans, HGP .. just a guess lol lookin at past papers, someone mentioned earlier a link to olympics, it is likely and in some respects, a bit ridiculous if they dont..

Reply 4190

nadzzdan

Original post by user3456

Yeah performance enhancing drugs will be a good link to make with olympics

Reply 4191

hannah_27

What are peoples views on the likelihood of phototropisms/phytochromes (crap) coming up???

Reply 4192

19941994

What are GMOs? :s

This was posted from The Student Room's iPhone/iPad

Reply 4193

BastardOranges

Original post by 19941994

What are GMOs? :s

This was posted from The Student Room's iPhone/iPad

GMOs are genetically modified organisms. It's in section 5, page 94 if you're using the CGP book.

Reply 4194

rudizzy123

Original post by hannah_27

What are peoples views on the likelihood of phototropisms/phytochromes (crap) coming up???

Haha that 'crap' made me lol! phytochromes wont come up

Reply 4195

19941994

Original post by rudizzy123

Haha that 'crap' made me lol! phytochromes wont come up

Your certainty has made me so happy haha i hate phytochromes! Is it safe to leave it out of revision?

This was posted from The Student Room's iPhone/iPad

Reply 4196

user3456

Also guys no core prac came up in bio4, could this mean 2 in bio5? or none in bio5 too?

Reply 4197

19941994

Original post by BastardOranges

GMOs are genetically modified organisms. It's in section 5, page 94 if you're using the CGP book.

Ohh ok lol thought it was something else i hadnt done lol :O thanks

This was posted from The Student Room's iPhone/iPad

Reply 4198

JizzMan

Last exam, LEEEAVE IT YEAH

Gonna flop this for sure; thought I had it all under control but when I did the past papers i realized its a whole different story... oh well, here's to hoping my coursework will help me pull through for the overall grade

Reply 4199

rudizzy123

Original post by 19941994

Your certainty has made me so happy haha i hate phytochromes! Is it safe to leave it out of revision?

This was posted from The Student Room's iPhone/iPad

Don't take my word for it because you never know. If you haven't revised and have got limited time then i'd reccomend leaving it out.

I think I know everything in syllabus now excluding past units, what will trip me up in this exam as usual is how science works, ethics, maths questions, poor interpretation and running out of time (as usual) :frown: