Topic 1 - Key Concepts

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Name the different parts of a light microscope

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1

Name the different parts of a light microscope

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2

Microscope slide

a clear plastic/ glass piece on which you mount your specimen being investigated

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3

Cover slip

a square clear plastic/ glass piece which goes on top of your specimen

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4

Stage

where you clip your microscope slide into place

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5

Eyepiece lens

part of the microscope you look through

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6

Objective lens

these magnify the image and there are different types with different magnification levels

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7

Lamp

this shines light to the specimen so it can be seen more clearly

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8

Coarse/ Fine adjustment knobs

help focus the image so it is clearer

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9

Differences between a light microscope and an electron microscope

Light microscope: used to study living cells, regular use when relatively low magnification and resolution is enough

Electron Microscope: provides higher magnification and higher resolution images, cannot be used to view living cells

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10

Draw a plant cell

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11

Draw an animal cell

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12

Nucleus

Contains dna , controls cell activities

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13

Cell wall

Made of cellulose, keeps cell rigid

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14

Cell membrane

Allows substances in and out of cell

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15

Vacuole

fluid filled sac that stores water

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16

Chloroplasts

Contains chlorophyll which is needed for photosynthesis

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17

Ribosomes

Where proteins are made

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18

mitochondria

Where respiration takes place

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19

Draw a plant cell

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20

Flagellum

tail for moving

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21

Flexible cell wall

Only found on bacteria cell, not made of cellulose

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22

Chromosomal DNA

One long strand of DNA that controls the bacteria

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23

Plasmid DNA

small loops of extra DNA

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24

Sub cellular structure

compartments' where specific processes take place within the cell

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25

Eukaryote

With nucleus

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Prokaryote

Without nucleus

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27

Differences between plant, animal and bacterial cell

Plant: eukaryotic (with nucleus), has cell wall, vacuole and chloroplasts

Animal: eukaryotic (with nucleus), has NO cell wall, vacuole and chloroplasts

Bacteria: prokaryotic (without nucleus) , has cell wall, no vacuole or chloroplasts , has flagellum, chromosomal DNA, plasmid DNA

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28

Different between mm and um

1mm (millimeter) = 1000um (micrometer)

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29

Formula for image, actual size and magnification

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30

Total magnification formula

Total magnification = eyepiece lens X objective lens

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