Mnemonic to remember monosaccharides and disaccharides

Note:
- To form dissacharides, glucose is involved in all 3 reactions.
- Galactose and lactose are obviously in one reaction.

To help you with memorising, I suggest using Mnemonics:
GGM: Go Grand Ma! - Glucose + Glucose --> Maltose
GFS: Go Father Son! - Glucose + Fructose --> Sucrose
GGL: Go Good Luck! - Glucose + Galactose --> Lactose

What are Mnemonics? Read the following links:

http://en.wikipedia.org/wiki/Mnemonic

http://www.bucks.edu/~specpop/mnemonics.htm

Try coming up with your own Mnemonics for other information, be it for your science or humanities subjects! :)

Trans fats

For some of you who would like to read more about trans fats, please look at the following link:

http://www.americanheart.org/presenter.jhtml?identifier=3045792

So yeah, do watch out when you shove french fries into your mouth heartily.
Haha!
*Ms Goh is equally guilty of it*

The one thing some people have been waiting for!

A student was asked to identify the two compounds in each of the three test tubes,
X, Y, and Z. The table above shows the results of the student's tests.


Which of the following statements are true?
A Glucose and starch had been placed in tube Z.
B Albumin and starch had been placed in tube Y.
C Albumin and oil had been placed in tube X.
D Starch and oil had been placed in tube Y.

Answer:
D

Note:
Sodium hydroxide + copper sulphate is actually biuret test. Test for presence of proteins.
Ethanol + water is actually ethanol emulsion test. Test for presence of fats.

=)

Diffusion and Osmosis animations

Dear all,

A few other links to animations that I;ve shown to you in class, in case you would like to relook at them =)

http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html

http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works.html

Crenation in animal cells

Recall the following (the table that I asked you to copy in your textbook):

Hypotonic solution (compared to the cell)
Plant cell: Become turgid
Animal cell: Swells and burst (Lysis)

Hypertonic solution (compared to the cell)
Plant cell: Becomes plasmolysed
Animal cell: Undergoes crenation

Crenation is the process in which cell shrinks and little spikes appear on the cell surface membrane.

In the following website, drag the mouse to the right and see how crenation occurs.
The more concentrated a solution is, the more hypertonic it is, the lower the water potential, hence water leaves the cell by osmosis to enter the solution.

http://www.yteach.co.uk/page.php/resources/view_all?id=Haemolysis_osmosis_diffusion_Plasmolysis_Facilitated_diffusion_Gradient_Passive_transport_Simple_diffusion_Active_transport_page_5&from=search

Grand Opening Ceremony

Dear all,

This is an additional platform created specially for you.
I will be using this to supplement my classroom teaching (answers to questions, links etc).
Ultimately, this blog will be walking through with you, until you take the N or the big O levels.
It's really not that hard to score in this subject. Really!

Hope it also helps to simulate interest in this subject. Maybe you might consider further studies in this vibrant field of science?

Well, have fun! =)