Please post any questions you remember! If you are confident in the correct answer, please also give what you wrote and any other acceptable answers you may think were available; please also correct me if I am wrong anywhere here
Assigned question number and answer== SECTION A - ALL MULTIPLE CHOICE [1 mark] ==| 1) Microscope (correct row)
| (LM 1,500x mag, 2 micrometers; TEM 500,000x mag, 0.2nm; SEM 100,000x mag, 0.2nm)
| C
| 2) Monomers of disaccharides join by what bond?
| Glycosidic
| Think it was C
2)
Questions without assigned numberPOTATO TUBER QUESTIONWhich two steps in the procedure should be taken to produce valid results?
- I put that different concentrations were used and the mass change was recorded.How can the student use the results to calculate water potential?
- I put 'plot a graph of mass change against concentration, find x intercept, use calibration curve'Label the parts of the cell. [3 marks]
- I think on this one there was cell wall, plasma membrane, and tonoplast.What would be found in the gap between the membrane and cell wall in the plasmolysed cell? [1 mark]
- (LABEL W) Sucrose Solution @DaVinciGirl TRANSPORT QUESTIONState the name of the name of the shift in the oxygen dissociation curve to the right: [1 mark]
- Bohr EffectBLOOD VOLUMES QUESTIONPercentage change in volume of O2 in saturated
blood and saturated
plasma? [2 marks]
- My solution:-where x = plasma value, y = blood value:-
100×xy−x=6600Erythrocytes have no organelles. Advantages/disadvantages? [2 marks]
- My solution:- Advantages: More space for Haemoglobin.- Disadvantages: Short lifespan.Viruses do not use erythrocytes as host cells; plasmodium does - suggest why? [2 marks]
- My solution:- Plasmodium is a protoctist.- It invades the erythrocyte and acts as a parasite.- As it has no organelles, the virus cannot use this as a host to reproduce.Volume of oxygen per minute? [2 marks]
- 1005 cm^3 @htrowslec