Cells and magnification Flashcards

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1
Q

give 3 differences between an animal and a plant cell (Eukaryotes)

A

Plant cells have Permanent vacuole containing Cell sap , mix of sugars water and salts
plants have Chloroplasts , animals dont
Plants have Cell WALL but animal cells do not

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2
Q

Give 3 differences between a eukaryotic and Prokaryotic cell

A

Prokaryotic (bacteria cells) have plasmids - extra circular genes for antibiiotic resistance
Circular strand of DNA to reproduce and survive
Flagella - tail like to propel bacteria

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3
Q

do bacterial cells have a cell wall

A

Yes bacterial cells have a cell wall and a cell membrane

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4
Q

give all units for microscopes

A

nanometres(nM) /1000 —–> Micrometers(Um) —–> milimeters(mm) —–> Meters
Divide by 1000 every time to go from nano to micrometers

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5
Q

What is resolution

A

the shortest distance between 2 points on an object that can still be distinguished as 2 seprate images without appearing blurry - a measure of how detailed the image is

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6
Q

Instructions of using a microscope

A
  1. Place slide on stage and secure with clips if there
  2. then select lowest power objective lens and move it using coarse focusing dial to get it as close as possible to slide without touching
    3.then look in eyepiece lens and turn the coarse focus away from slide until it comes into focus
    4.turn fine focus until image clear
    to find magnification multiply eyepiece lens magnification by the objective lens multiplication
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