Mistakes to avoid on the IB Biology Exams! #1 - 25

CHECK OUT THE NEXT VIDEO IN THE SERIES (#26-50) IN THE EXAM PLAYLIST :)

Derived from mistakes I've personally seen students make and from reading the examiner's reports for past IB Biology exams.

[hairyballrubber]

9 years later and this is still so useful

[lemichabracey]

Paper 1 & 2 in two days.... oh goodness

[Owlailable]

This is fantastic, I have my IB bio exam tomorrow :) Thank you for the help

[candleinthewind]

It went so bad this year there was a petition signed 7, 000 times. And the IB did respond.

[StephanieCastle]

Thats because there are only 2 H-bonds on N in the alanine amino acid structure. You may be referring to a zwitterion whereby you have an NH3+ group and a COO- group. That is something different, and not required in the core syllabus for IB Biology.

[AirotkivViktoria]

Very helpful!! 
Exams in 2 days! 
Thanks

[StephanieCastle]

No because I state the example is if carbon dioxide goes FROM 338ppmv TO 360ppmv. Thats an increase in concentration and therefore I've calculated the percentage increase. If the numbers were from 360ppmv to 338ppmv then it would be a percentage decrease, but you'd calculate differently [(360-338)/360] x100 because its a percentage of the starting value.

[arsenallife]

This is really simple yet thorough. Thank you! I look for to future videos :)
I am aiming for a 7 on the exam.

[bee]

I don’t even take the IB exams this year, but my AP biology teacher is making us watch this video.

[BadSho]

thank you so much for this! it is really helpful! finals in 3 days!!

[StephanieCastle]

I needed to correct something and I pride myself on making corrections in a timely fashion - It will be back up tomorrow, check back :)

[starrchica]

This video is really helpful, thank you so much for making it!

[StephanieCastle]

GOOD LUCK TO EVERYONE IN THEIR EXAMS TODAY!! :D

[StephanieCastle]

I couldn't tell you, I have no way of knowing. But its likely that several of the issues (units, command term interpretation etc) will present themselves somehow. Paper 2 always has data analysis. Factually, they may not be the exact same questions, but the syllabus is the same so if you make those factual statements in any answer be sure to make sure you are accurate. Good luck! (and don't forget to take a calculator and ruler!)

[StephanieCastle]

Please see video 3.3.5 which addresses the standard requiring you to draw and label a diagram of DNA :)

[andresf.torres]

Thank you! paper 1 and paper 2 in 6 hours!

[dabestfatkid]

Paper 1 and 2 tomorrow, IB exams 2021.

[chakdeindiacricket]

Thank you so much, this is so helpful!

[em]

oh sorry I got the numbers mixed up in my head, thanks!!

[StephanieCastle]

I tried to be! Good luck in your exams!