OCR A Biological Molecules Quiz

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Success by outcome not effort..More efficient revision for A-level Biology

Most students revise by copying out textbooks that they didn't understand when they were taught the concepts. There are better ways of learning and revising.

Here is one way of revising Biological Molecules,  print these on card then cut out and go through with a friend - then try making your own.

Here is the full pdf document, with 7 pages of revision cards.

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A-level Biological Molecules - 11 basic points to help you learn

1. 99% of life is Carbon, Hydrogen, Oxygen and Nitrogen (and a bit of Phosphate)

2. Mono is one, Di (and Bi) is two, Tri is three, oligo is a few, poly is many.

3. Anything ending in -ose is a sugar, -ol is a lipid. - ase is an enzyme and all enzymes are proteins

4. Beta glucose is only in Cellulose - everything else is Alpha glucose

5. A condensation reaction makes water and joins two monomers together - glycosidic bond is a condensation reaction

6. A hydrolysis reaction breaks a bond (lysis means split) - with the addition of water (hydro)

7. A Glycosidic bond joins 2 monosaccarides together 

8. A peptide bond joins 2 amino acids together (many-poly, by peptide bonds...=polypeptide)

9. A lipid is made from a glycerol joined by an ester bond to 3 (tri) fatty acids - hence triglyceride

10. Carbohydrates and lipids are just C,H,O. Amino acids are C,H,O,N (ok, and a bit of Sulphur with 2 of the R groups), Nucleic acids (DNA, RNA, ATP) have C,H,O,N,P. Phospholipids are C,H,O,P.

11. Large or non-polar molecules are insoluble in water hence Starch, Glycogen and Fats are osmotically inactive which means they are good energy storage molecules