Investigating Membrane Permeability.

Authors Avatar

Investigating Membrane Permeability

Apparatus:cogf gfr segfgfw orgf gfk ingf fogf gf.

· 8 test tubescoea ear seeaeaw orea eak inea foea ea.

· Test tube rackcodg dgr sedgdgw ordg dgk indg fodg dg!

· Measuring cylinder

· Bunsen burner 

· Knife 

· Beaker 

· 1 beetroot 

· Dilute hydrochloric acidcobf bfr sebfbfw orbf bfk inbf fobf bf!

· Dilute sodium hydroxide solutioncobg bgr sebgbgw orbg bgk inbg fobg bg.

· Ethanol abidzaman, please do not redistribute this paper. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this paper elsewhere on the internet. Anybody found doing so will be permanently banned.

· Distilled watercogb gbr segbgbw orgb gbk ingb fogb gb:

· Thermometer 

· Tongscocb cbr secbcbw orcb cbk incb focb cb.

· Tripodcofd fdr sefdfdw orfd fdk infd fofd fd:

· Mat lGExVw Visit coursework cd in cd fo cd for cd more hypothesis cd Do cd not cd redistribute lGExVw 

· Cork borer 

Method:

1. I first cut three discs each about 2mm thick from the cylinder, which was cut out of the beetroot using a corer and place them in a test tube containing 10cm3 distilled water. This was my test tube number1.coea ear seeaeaw orea eak inea foea ea.

2. I then cut 21 more discs and rinse them under the running water, until the pink water collected in the beaker was clear.coeb ebr seebebw oreb ebk ineb foeb eb.

3. I placed three of the 21 washed discs, in each four test tubes.cogf gfr segfgfw orgf gfk ingf fogf gf.

To test tube 2 I added 10cm3 of distilled water This cours from www.coursework.info

To test tube 3 I added 10cm3 of ethanol This coursework from www.coursework.info

To test tube 4 I added 10cm3 of dilute hydrochloric acid wEQIk Visit coursework gd in gd fo gd for gd more dissertation gd Do gd not gd redistribute wEQIk 

To test tube 5 I added 10cm3 of dilute sodium hydroxide solution U1OJsuKR from U1OJsuKR coursewrok U1OJsuKR work U1OJsuKR info U1OJsuKR

4. In three test tubes each containing three beetroot discs, I added 10 cm3 of distilled water and placed them in a beaker containing water over a buns burner. I also placed a thermometer in the beaker. 8yv from 8yv coursewrok 8yv work 8yv info 8yv

5. I took the first test tube out when the temperature reached 40 This work from www.coursework.info

6. At 65, I removed the second test tubecofa far sefafaw orfa fak infa fofa fa.

7. The last test tube was removed at 100coda dar sedadaw orda dak inda foda da;

8. I then compared the test tubes and recorded my results. abidzaman, please do not redistribute this writing. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this writing elsewhere on the internet. Anybody found doing so will be permanently banned.

Results:codf dfr sedfdfw ordf dfk indf fodf df:

Join now!

Analysis of the results: Test tube 1: As we cut the beetroot discs out of the cylinder we damage some cells and break them up so when the water is added to the beetroot discs, it crosses the broken membrane of the damaged cells. Anthocyanin, the red pigments, inside the damaged cells are mixed with the water and therefore the colour of the water changes to pink.cobc bcr sebcbcw orbc bck inbc fobc bc:

The reason the colour of the beetroot discs do not change is that the phospholipid bilayer, which is a major constituent of the cell surface membrane, is ...

This is a preview of the whole essay