exp 2.2 to prepare and examine plant and animal cells

Question 1

how do we obtain a sample of plant cell

Answer 1

use forceps to remove a thin layer of cells between the leaves of an onion

Question 2

how do we prepare the plant cell slide

Answer 2

place sample onto glass slide
add a few drops of iodine
add a few drops of water
lower coverslip and view under microscope

Question 3

function of adding iodine to sample of a plant cell

Answer 3

stains the nucleus making it more clear under the microscope

Question 4

function of adding water to the sample of a plant cell

Answer 4

prevents cells from drying out

Question 5

what 2 things are added to a sample of a plant cell

Answer 5

iodine + water

Question 6

how to obtain a sample of an animal cell

Answer 6

swab the inside of your cheek using a cotton bud and smear onto glass slide

Question 7

how to prepare an animal cell slide

Answer 7

add a few drops of methylene blue
add a few drops of water
lower coverslip and view under the microscope

Question 8

what 2 substances are added to an animal cell slide

Answer 8

water
methylene blue

Question 9

why is methylene blue added to an animal cell sample

Answer 9

to stain the nucleus to make it more visible under the microscope

Question 10

why is water added to an animal cell sample

Answer 10

to prevent cells from drying out

Question 11

how do you lower the coverslip?

Answer 11

lower slowly at a 45 degree angle

Question 12

why do we lower the coverslip at an angle

Answer 12

to prevent air bubbles