Cells

Question 1

what does the cell membrane do?

Answer 1

-Semi permeable
-Controls the substances passing in and out of the cell

Question 2

what does the cytoplasm do?

Answer 2

-Supports organelles suspended in the jelly
-Where many chemical reactions happen

Question 3

what does the nucleus do?

Answer 3

-Controls the activity of the cell
-Contains DNA

Question 4

what does the cell wall do?

Answer 4

-Provides strength and supports the cell, i.e. it holds it up.

Question 5

what do chloroplasts do?

Answer 5

-Contains chlorophyll and help the plant carry out photosynthesis.

Question 6

what does the vacuole do?

Answer 6

-Stores dissolved substances

Question 7

What is an organism?

Answer 7

A name given to living things

Question 8

What is a unicellular organism?

Answer 8

a living organism that is made up of one cell

Question 9

What is a multicellular organism?

Answer 9

an organism that consists of many cells specialised to carry out different functions

Question 10

What is the role of ribosomes?

Answer 10

To make proteins, such as hair, skin and nails, enzymes, hormones and antibodies

Question 11

What is the role of mitochondria?

Answer 11

Powerhouse of the cell
Where respiration occurs, which is the process that releases energy from the food we eat

Question 12

What is chlorophyll?

Answer 12

Gives plants its green colour and allows the plant cell to carry out photosynthesis

Question 13

What is a specimen?

Answer 13

a sample of cells taken for examination using the microscope

Question 14

What is the calculation for magnification?

Answer 14

eyepiece x objective = overall magnification

Question 15

Parts of an animal cell?

Answer 15

-Cell membrane
-Mitochondria
-Vacuole (?)
-Cytoplasm
-Nucleus

Question 16

Parts of a plant cell?

Answer 16

-Nucleus
-Mitochondria
-Cell wall
-Cell membrane
-Chloroplast
-Vacuole
-Cytoplasm

Question 17

Parts of the microscope?

Answer 17

-Eyepiece
-Objective lenses
-Nosepiece
-Stage clips
-Stage
-Diaphragm
-Light source
-Coarse adjustment knob
-Fine adjustment knob
-Base

Question 18

Function of the eyepiece lense?

Answer 18

Magnification of x10

Question 19

Function of objective lense?

Answer 19

Lenses of different strengths which can be used to magnify the image more clearly

Question 20

Function of stage?

Answer 20

Where the slide is placed

Question 21

Function of stage clips?

Answer 21

Holds the slide in place

Question 22

Function of diaphragm?

Answer 22

Controls the amount of light that goes onto the microscope slide

Question 23

Function of the light?

Answer 23

Projects light onto the slide to see the specimen more clearly

Question 24

Function of the base?

Answer 24

Keeps the microscope from falling over

Question 25

Function of the fine focus knob?

Answer 25

Used to focus the image so it is sharp and clear

Question 26

Function of the coarse focus knob?

Answer 26

Used to focus the image to see it clearly

Question 27

Function of the nosepiece?

Answer 27

Used to switch to a different objective lense

Question 28

What stain is used on a plant cell?

Answer 28

iodine

Question 29

Why are stains used on cells?

Answer 29

to be able to see the parts more clearly

Question 30

What stain is used on an animal cell?

Answer 30

Methylane Blue