Monday 11 February 2019

Biology 12

Today we started our next unit on cells and cell organelles.   We started the big power point notes.   Module questions Section B:  Cell Structures up to iii) the nucleolus is due tomorrow.

ANSWERS TO BIOMOLECULES REVIEW:
1. A     2. C    3. D   4. D    5. B    6. D    7. C    8. D  9.OMIT  10. D   11. C   12. A   13. C
14. D    15. B    16. A    17. C    18. B    19. D    20. C    21. B    22. C    23. D    24. D    25. A    26. C    27. A    28. B    29. B    30. C    31. C    32. C    33. C    34. A    35. A    36. B    37. D    38. A
39. D    40. D      

SHORT ANSWER:
1.  Draw any two monomers (like two amino acids) link them together by getting rid of an OH from one molecule and an H from the other (dehydration synthesis forms a polymer).  Water is produced in dehydration synthesis.  Hydrolysis splits polymer back into monomers.

2.  Carbohydrates:  sucrose, glycogen, monosaccharide, starch
Lipids:  Steroid, fatty acids, saturated
Proteins: Enzyme, peptide, amino acid, tertiary structure

3.  Denaturing can change the shape of a protein by distruption of the hydrogen bonds that hold the structure together.  Heatings or changing the pH can denature proteins.

4.  Draw ring structure of glucose.  Draw rough sketch of starch (plant energy storage), glycogen (animal energy storage) and cellulose (plant cell walls) as polymers of glucose.  

Biology 11

Today we took notes on Types of Natural Selection:  Stabilizing, Directional and Distruptive.   We also learned the terms Convergent and Divergent Evolution.   We have two worksheets comparing marsupials and placental mammals.   How are these animals examples of convergent evolution?