3- CELL STRUCTURE

Question 1

nucleus

Answer 1

contains genetic info (DNA) and controls the activities of the cell

Question 2

cell membrane

Answer 2

is partially permeable and controls what enters and exits the cell

Question 3

cytoplasm

Answer 3

it contains enzymes and is the site if chemical reactions

Question 4

chloroplasts

Answer 4

contain chlorophyll to trap light energy, and use it to combine carbon dioxide and water to make food by photosynthesis

Question 5

cell wall

Answer 5

it is strong and help to maintain the shape of the cell and give it support. it also protects the plant cell from taking in too much water and bursting

Question 6

vacuole

Answer 6

it contains cell sap (water with sugars and salts) which cause it to take in water by osmosis and support the cell by turgor pressure

Question 7

what can be found in the cytoplasm of a cell?

Answer 7

small structures called organelles (like the nucleus)

Question 8

what group of substances does cellulose belong to?

Answer 8

polysaccharides

Question 9

cell walls are ___ permeable

Answer 9

fully permeable.

because of the large spaces between the fibres, even very large molecules, are able to go through the cellulose cell wall

Question 10

the cell surface membrane is a very thin layer of _____ and __

Answer 10

protein and fat