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Pregunta 1
Pregunta
what is the definition of magnification?
Respuesta
-
how big an object is
-
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
Pregunta 2
Pregunta
what is the definition of resolution?
Respuesta
-
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
Pregunta 3
Pregunta
what is the resolution and magnification of a light microscope?
Respuesta
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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
Pregunta 4
Pregunta
how many micro metres is one cm equivalent to?
Respuesta
-
one hundred thousand
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one million
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ten thousand
Pregunta 5
Pregunta
how many nanometres is one cm equivalent to?
Respuesta
-
ten million
-
one million
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one hundred million
Pregunta 6
Pregunta
what is the maximum magnification and resolution of a scanning electron microscope?
Respuesta
-
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
Pregunta 7
Pregunta
what is the maximum magnification and resolution of a transmission electron microscope?
Respuesta
-
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
Pregunta 8
Pregunta
what is a disadvantage of an electron microscope?
Respuesta
-
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
Pregunta 9
Pregunta
what is the cytoskeleton made of?
Respuesta
-
carbohydrate strings
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protein fibres
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phospholipids
Pregunta 10
Pregunta
what is the main role of the cytoskeleton?
Respuesta
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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
Pregunta 11
Pregunta
how are microtubules arranged inside flagella and cilia?
Respuesta
-
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
Pregunta 12
Pregunta
what are plant cell walls made of?
Respuesta
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murein
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cellulose
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amylose
Pregunta 13
Pregunta
what is the function of lysosomes?
Respuesta
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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
Pregunta 14
Pregunta
what is the highly folded inner membrane of a mitochondria called?
Respuesta
-
cristae
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matrix
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epithelium
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