Edexcel International A Level Biology Unit 6 ( WBI06)- 13th May 2015

What about limitations then?
I havent studied AS bit yet, omg, this is gonna kill me.

Limitations could be anything from
there are certain variables that are not controlled
to maybe the way of measuring the DV is not good enough or it doesnt correspond to what we're looking for
Limitations is the bit where you look at everything on your plan and just criticise it
IV DV CV

My bets are on either tensile strength or electrophoresis .

Do you think intensity of light and wavelength of light would be considered as two separate factors to be controlled for an experiment?

Also is anyone doing M3 right before this tomorrow as well?

I would say that there is a 50:50 chance of those 2 variables to be considered as different because it may appear in the mark scheme as

(intensity/wavelength) of light

I would suggest you use either one of intensity or wavelength and another variable like temperature or pH obviously depending on the investigation.

Some of my classmates are resitting C1 lol but no one is doing M3

Yeah fair enough. When in doubt go for temperature lol

I don't understand the grade boundaries for this paper though, Jan 2014 which was an average paper had really nice boundaries but Jan 15 which I found hard had unreasonably high ones? I need an A* in this

My bets are on either tensile strength or electrophoresis .

Do you think intensity of light and wavelength of light would be considered as two separate factors to be controlled for an experiment?

Also is anyone doing M3 right before this tomorrow as well?

Totally mate, Jan 15 was ridiculously high (around 44 for an A* i think). Well we can only hope that it goes lower this year and i am pretty sure it will because most students sit unit 6's in June compared to Jan

I'm thinking mitosis might pop up

Better revise my staining techniques then

I've got predictions for unit 6 question 1! Question 3 however shows no trend so just be ready. Mind you my predictions are based on nothing but the fact that these experiments haven't come up before so here we go.
Question 1

June 10- Beetroot
Jan 11- Antibiotics
June 11- Temp effect on brine shrimps/seedlings
Jan 12- Respirometer
June 12- Ecology
Jan 13- Vitamin C
June 13- Spirometer
Jan 14- PCR
June 14- Habituation
Jan 15- Respirometer.

Predictions? DAPHNIA, ENZYMES, MITOSIS, TOTIPOTENCY, MINERAL DEFICIENCY, TENSILE STRENGTH AND GEL ELECTROPHORESIS

Q3= NO TREND!!

MAKE SURE YOU ARE FAMILIAR WITH ALL THE EXPERIMENTS FROM UNIT 3 AND UNIT 6.

Daphnia, totipotency, mineral deficiency and enzymes have all come up in one form or another before


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Pcr has come up before.

Also, I hope question 3 will be antibiotic stuff haha


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I want the antibiotic or the antimicrobial properties of plant extracts experiment as well .. but sadly it has come up at least 3 times in some way or another (Q1 or Q3).. Doubt it will again this year

I predict Mitosis, Plant fibres tensile strength or gel electrophoresis! But who knows.. The effect temperature on respiration rate of germinating seeds has come up twice with basically an identical question both times.. That one will most likely not come up again as it did in Jan 15, but the point is..... A pattern has not been followed like in the AS unit 3 papers! It could be any of the practicals tbh :/

Let's hope some people take one for the team and lower the boundaries