100%(9)9 out of 9 people found this document helpful
This preview shows page 6 - 9 out of 10 pages.
represents the smallest amount of simple sugar and red the highest.5.The results of all three tests and control tests are in Table 2â€‘2.TABLE2-2RESULTSOFCHEMICAL TESTSINDICATOR SOLUTIONSHOWS THE PRESENCE OF:INITIAL COLORFINAL COLORRESULTS (+ OR -Silver Nitrate TestControl Tube??ClearCloudy white+Iodine TestControl Tube??Red-brownBlack+Benedict's TestControl Tube??BlueOrange+Silver Nitrate TestExperimental Tube????Cloudy white??Iodine TestExperimental Tube????reddish??Benedict's TestExperimental Tube????blue??According to your test results, list the molecules that were able to diffuse out of the dialysis bag. Fill in answers where there are a pair of??Ans: Salt and starch.6.If molecules are expected to move from high concentration to low concentration, why didn't all the molecules (salt, sugar, and starch) leave the dialysis tubing bag?7.The ability to separate molecules from each other using a selectively permeablemembraneis referred to as dialysis. Did the experiment you just finished illustrate this concept? Explain your answer.
1.Let’s assume we have two slides, each with a piece of onion skin on them. To one we will add a drop of distilled water. The other will be made by substituting a drop of 20% saline for the water. This is what a normal onion cell looks like: 2.We would wait five minutes,and then could check both slides again. This is what the two sets of cells look like after the drops were added and five minutes passed:Onion in 20% Saline Solution Draw a large picture showing one or two representative cells from each slide.5.Add the following labels to your diagrams: cell wall, nucleus, nucleolus, cytoplasm.6.In one of your slides, you should be able to see the onion cell membrane.On which slide is the cell membrane visible?Ans: The one with distilled water
7.If we took cells from a leaf at the top of the onion plant instead of from the onion bulb, what additional organelle would you expect to see in those cells?Ans: Chloroplast.