Question

Presence of starch (a type of carbohydrate) in leaves lab activity

Answer 1

Answer:

Starch is a complex carbohydrate which is polysachharide.

Explanation:

It forms complex helices in which Iodine molecule can be holded.So,Starch on treating with iodine gives blue colour is the standard lab test for starch.

Answer 2

The lab experiment for starch detection in leaves is as follows.

The lab experiment

Lab report

• Point: To actually look at the presence of starch in the leaves
• Speculation: The presence of starch can be distinguished on the off chance that the example becomes dark blue after the iodine arrangement.
• Materials :

1) Green leaves

2) Wire bandage

3) Iodine arrangement

4) Forceps

5) Specula

6) Bunsen's burner

7) Test tube

8) Water

9) Tile

10) mount stand

11) glass

12) slide

13) dropper

14) water

15) water shower

Methodology:

• Gather dim green leaves (as leaves contain starch) scrub down and let it heat with the assistance of the burner on the dressing step through an examination tube continuation ethanol and supplement the leaves in it
• Leave the test tube in the water shower and allow it to get ready. Allow it to bubble up for 4-5 mins eliminate the test tube securely out of the water shower separate the solution from the leaves, pour the arrangement in a measuring stencil with the assistance of the spatula eliminate the leaves and put them on white tiles flush the leaves delicately and add not many drops of iodine arrangement leave the leaf for some time and afterwards notice the variety change if any

Perception

• At the point when the leaf was in ethanol arrangement (getting warmed in the water shower), it gradually lose its tone and the arrangement became green. This shows that it has misfortune in all its chlorophyll shades

• At the point when there was iodine added toward the finish of the investigation, there was no blue dark variety tracked down on the leaves

End

• At the point when added iodine to leave the blue dark variety shows the presence of starch
• Chlorophyll contains starch

(#SPJ2)