Iodine starch- Cell membrane transport

What part of a cell does the "plastic bag" represent?

• cell membrane- enter or leave

• cytoplasm- jelly fluid that fills up cell

• nucleus- where the genetic information is stored

Tags

NGSS.MS-LS1-2

What color was the starch at the start of the experiment? dark or white?

(a)  

What color was the starch at the end of the experiment? dark or white?

(a)  

Tags

NGSS.MS-PS1-2

The iodine moved (a)   (Select : in to /out of)

the bag, becuase the starch in the bag turned a purple dark color and the iodine is purple dark color.

Water and starch are bigger molecules that CANNOT cross the cell membrane but (a)   is a smaller molecule that can

• Iodine
• salt
• sugar

The plastic bag is PERMEABLE to iodine because...

• iodine got mixed with water outside since water can escape the plastic bag

• iodine got mix with starch since it is a small molecule

• iodine is a very large molecule that can easily cross the cell membrane

The plastic bag is​ (a)   to starch because the solution in the glass beaker did not turn dark color.

• NOT permeable
• permeable

Match the following

• movement of water from High - Low

• Osmosis

• react changes color to test carb-starch

• During the experiment

• prepare the iodine bag / beaker

• End of the experiment

• Iodine molecules move from bag

• Start of the experiment

• iodine turned dark purple

• Iodine

(a)   is that physical process in which any solvent moves, without input of ENERGY, across a semi-permeable membrane separating tow solutions of different concentrations.

• Diffusion
• Osmosis
• Active Transport

Select other names for cell membrane. Hint select- 3

• plasma membrane

• cytoplasm

• cell wall

• phospholipid bi layer

• semi-permeable membrane