topic 1

Question 1

[ for table about potatos]
explain why potato chip B has a greater increase in mass than chip A?

Answer 1

Chip B has a greater surface area. Therefore more water is absorbed into the potato chip.

Question 2

potato chip A is transferred from the distillled water into a concentrated salt solution explain what will happen to the cells in potato chip A?

Answer 2

cells lose water and water moves out by osmosis. From high concentration of water molecule. Then to a low concentration of water molecules. This goes through partiallly permable membrane.

Question 3

explain how the electreon microscope image helps us to understand more about ciliated epithelium?

Answer 3

high magnification can be used so the cilia are more visible and the sub-celluar structures are visible.

Question 4

figure 6 shows a diagram of a cell?

Answer 4

vacuole and cell membrane

Question 5

cell wall function?

Answer 5

contaions cellulose to provide support

Question 6

large vacuole function?

Answer 6

stores cell sap

Question 7

the student squashed the root tip of an onion plant on a microscope slide.
Describe how the student should use a light microscope to view the squashed root tip?

Answer 7

place the slide on the stage on the microscope and look through the eyepeice lens. The focus wheel when turned will make the image clearer and use the lowest objective lens magnification.

Question 8

the diameter of the cell is 15um use figure 7 to estimate the diamter of the cell nucleus?

Answer 8

5(um)–; 1.5

Question 9

when the active site of the emzyme changes shape the enzyme is what?

Answer 9

denatured.