2157792
Frage 1
Frage
what is the definition of magnification?
Antworten
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how big an object is
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the difference between the size of the image and the size of the object
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the degree to which the size of an image is larger than the object itself
Frage 2
Frage
what is the definition of resolution?
Antworten
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the degree to which it's possible to distinguish between to objects that are very close together
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how detailed an image looks
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how blurry an image looks
Frage 3
Frage
what is the resolution and magnification of a light microscope?
Antworten
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res = 2000 nm, mag = x2000
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res = 200 nm, mag = x 1500
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res = 200 micrometres, mag = x2000
Frage 4
Frage
how many micro metres is one cm equivalent to?
Antworten
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one hundred thousand
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one million
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ten thousand
Frage 5
Frage
how many nanometres is one cm equivalent to?
Antworten
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ten million
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one million
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one hundred million
Frage 6
Frage
what is the maximum magnification and resolution of a scanning electron microscope?
Antworten
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mag = x500 000, res = 0.2 nm
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mag = x 500 000, res = 2 nm
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mag = x100 00, res = 0.2 nm
Frage 7
Frage
what is the maximum magnification and resolution of a transmission electron microscope?
Antworten
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mag = x500 000, res = 0.2 nm
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mag = x 100 000, res = 0.2 nm
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mag = x500 000, res = 2 nm
Frage 8
Frage
what is a disadvantage of an electron microscope?
Antworten
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samples need to be prepared in a vacuum so electron beam is not deflected by molecules in the air
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it has a maximum resolution which is 1000 times greater than a light microscope
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it needs to be cleaned in ethanol daily
Frage 9
Frage
what is the cytoskeleton made of?
Antworten
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carbohydrate strings
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protein fibres
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phospholipids
Frage 10
Frage
what is the main role of the cytoskeleton?
Antworten
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provide stability for the cell
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control what substances enter or leave the cell
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restrict the movement of hydrophilic substances past the cell
Frage 11
Frage
how are microtubules arranged inside flagella and cilia?
Antworten
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in a ring of 9
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in a ring of 11 with 1 in the centre
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in a ring of 9 with 2 in the centre
Frage 12
Frage
what are plant cell walls made of?
Antworten
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murein
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cellulose
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amylose
Frage 13
Frage
what is the function of lysosomes?
Antworten
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to packages and modify proteins
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produce ATP during respiration
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contain a powerful digestive enzyme to break down waste materials
Frage 14
Frage
what is the highly folded inner membrane of a mitochondria called?
Antworten
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cristae
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matrix
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epithelium
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