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This link carries you to most of our biochemistry topics in an animated collaborative manner.

Cellular Respiration, crossword puzzle.




2. The purpose of cellular respiration is to create ____ for

a cell to function and grow.

3. 6-carbon molecule that is broken down to make ATP.

5. 2nd part of 14-DOWN.

6. ____ is released when chemical bonds are broken, but it

cannot be used to make ATP.

11. ____ builds up in your muscles without oxygen.

12. Electron Transport Chain occurs in this part of the


16. Gaseous molecule required for aerobic respiration.

17. The type of energy released when glucose is broken


18. ____ is a common name for anaerobic respiration.

19. A 3-carbon molecule that is the product of glycolysis.



1. This is where glycolysis occurs in the cell.

4. This 1-carbon gaseous molecule is a waste product of

cellular respiration.

7. The substance that yeast produce when oxygen is not


8. The process that splits glucose into 2 3-carbon


9. These are carried by NADH to the ETC.

10. Where the Krebs cycle occurs.

13. Organelle that is the site of aerobic respiration.

14. ATP stands for _____ (with 5-ACROSS).

15. Pyruvate is converted to ____, which enters the Krebs



Points noted on glycolysis:




-Hexokinase takes the terminal from ATP to add to glucose-6-phosphate

-Every cell has glucose transporters. By phosphorylating glucose-6 phosphate, the glucose cannot move but by adding phosphate to glucose, it becomes unstable (abit) and activated which promotes reaction.

-Phosphofructokinase-1 is the most regulated enzyme followed by hexokinase in glycolysis.

-Bisphosphate has 2 phosphates not attached to the same carbon as in diphosphate.

-Aldolase does the splitting where G3P and DP are isomers of each other.

-DHAP does not contiune in glycolysis.

-TPI converts DHAP to G3P so you get 2 molecules of G3P at the end of the prep-phase.

-TPI is a kinetically perfect enzyme.

-All kinases require Mg2+ as a cofactor because it stabilizes the charge on the ATP molecule.

-All enzymes have an induced fit to prevent water from hydrolysing ATP.

-Oxidation phase in the pay-off section is energetically feasible.

-Oxidation provides energy to phosphates to form 1-3-BPG(2) amd would be unfeasible without oxidation.

-Gylcolysis cannot go on without NAD+ (low conc. in cells)

-3ways to get ATP: substrate-level phosphorylation, oxidative phosphorylation and photo-phosphorylation in plants.

-1-3 BP is a very high energy molecule.

-Most ATP comes form Oxidative phosphorylation.




David L. Nelson, Michael M. Cox. Lehninger Principles of Biochemistry. New York: W. H.

Freeman and Company, 2008.