Test
F211 biology
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Preguntas del test (14)
1what is the definition of magnification?
- Ahow big an object is
- Bthe difference between the size of the image and the size of the object
- Cthe degree to which the size of an image is larger than the object itself
2what is the definition of resolution?
- Athe degree to which it's possible to distinguish between to objects that are very close together
- Bhow detailed an image looks
- Chow blurry an image looks
3what is the resolution and magnification of a light microscope?
- Ares = 2000 nm, mag = x2000
- Bres = 200 nm, mag = x 1500
- Cres = 200 micrometres, mag = x2000
4how many micro metres is one cm equivalent to?
- Aone hundred thousand
- Bone million
- Cten thousand
5how many nanometres is one cm equivalent to?
- Aten million
- Bone million
- Cone hundred million
6what is the maximum magnification and resolution of a scanning electron microscope?
- Amag = x500 000, res = 0.2 nm
- Bmag = x 500 000, res = 2 nm
- Cmag = x100 00, res = 0.2 nm
7what is the maximum magnification and resolution of a transmission electron microscope?
- Amag = x500 000, res = 0.2 nm
- Bmag = x 100 000, res = 0.2 nm
- Cmag = x500 000, res = 2 nm
8what is a disadvantage of an electron microscope?
- Asamples need to be prepared in a vacuum so electron beam is not deflected by molecules in the air
- Bit has a maximum resolution which is 1000 times greater than a light microscope
- Cit needs to be cleaned in ethanol daily
9what is the cytoskeleton made of?
- Acarbohydrate strings
- Bprotein fibres
- Cphospholipids
10what is the main role of the cytoskeleton?
- Aprovide stability for the cell
- Bcontrol what substances enter or leave the cell
- Crestrict the movement of hydrophilic substances past the cell
11how are microtubules arranged inside flagella and cilia?
- Ain a ring of 9
- Bin a ring of 11 with 1 in the centre
- Cin a ring of 9 with 2 in the centre
12what are plant cell walls made of?
- Amurein
- Bcellulose
- Camylose
13what is the function of lysosomes?
- Ato packages and modify proteins
- Bproduce ATP during respiration
- Ccontain a powerful digestive enzyme to break down waste materials
14what is the highly folded inner membrane of a mitochondria called?
- Acristae
- Bmatrix
- Cepithelium
Información
- Descripción
- AS - Level Biology Test sobre F211 biology, creado por rosieoj2 el 01/03/2015.
- Autor
- rosieoj2
- Idioma
- English
- Visitas
- 50
- Etiquetas
- Valoración
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