Biology Unit 2 - Cells

[Simran Venkatraman]

Yeah, I wanted to know if knowing the exact values of comparative cell sizes was mandatory in the syllabus. Also, any tips on studying Units 2, 3, 4 (reference videos, notes online, animations? )

Any kind of help would be appreciated

[Egos]

Do not forget to remember:

1 millimeter (mm) = 10^-3 meters

1 micrometer (μm) = 10^-3 millimeters

1 nanometer (nm) = 10^-3 micrometers

Then have a look at this and you know, just memorise it. It makes total sense if you actually understand it. So you might not even need to memorise it.

A molecule = 1 nm

Thickness of cell membrane = 10 nm

Viruses = 100 nm

Bacteria = 1μm

Organelles = up to 10 μm

Eukaryotic cells = up to 100 μm

http://ibguides.com/...2.1-cell-theory

This is what it says in the Biology Syllabus (in case you do not have it http://occ.ibo.org/i...ui_0903_1_e.pdf):

Appreciation of relative size is required, such as molecules (1 nm), thickness of membranes (10 nm), viruses (100 nm), bacteria (1 μm), organelles (up to 10 μm), and most cells (up to 100 μm). The three-dimensional nature/shape of cells should be emphasised.

Other useful websites:

http://click4biology...c4b/2/cell2.htm - I personally do not find it too useful but if you do not get confused because of too much reading, then this is fine.

http://www.scribd.co...2501655/Biology - My favourite! My exams are in May so I am revising from this source.

http://i-biology.net/ibdpbio/02-cells/ - If you want to find questions and a teacher who writes online, this is the website you should check out.

http://www.youtube.c...er/SCScienceVid - Unfortunately this is only SL but useful I guess..

Edited March 10, 2013 by Egos

[nuby]

http://www.scribd.co...2501655/Biology - My favourite! My exams are in May so I am revising from this source.

Is that comprehensive enough for the exams? Does it cover everything in enough depth? By the way, good luck on your exams!

[onur basman]

this is also a great site with many understandable animations... http://highered.mcgraw-hill.com/sites/dl/free/0072437316/120060/ravenanimation.html

[Egos]

http://www.scribd.co...2501655/Biology - My favourite! My exams are in May so I am revising from this source.

Is that comprehensive enough for the exams? Does it cover everything in enough depth? By the way, good luck on your exams!

It covers literally everything you need to know for IB Biology plus there are the AHL topics as well as option E and G. If you prefer reading something even more concise and brief, you can try ibguides.com

You can also try this: http://www.youtube.com/user/crashcourse?feature=watch

There are some related topics in the biology section of the channel.

Edited March 12, 2013 by Egos

[nuby]

http://www.scribd.co...2501655/Biology - My favourite! My exams are in May so I am revising from this source.

Is that comprehensive enough for the exams? Does it cover everything in enough depth? By the way, good luck on your exams!

It covers literally everything you need to know for IB Biology plus there are the AHL topics as well as option E and G. If you prefer reading something even more concise and brief, you can try ibguides.com

You can also try this: http://www.youtube.com/user/crashcourse?feature=watch

There are some related topics in the biology section of the channel.

Awesome, thank you!