F211 biology

Description

AS - Level Biology Quiz on F211 biology, created by rosieoj2 on 01/03/2015.
rosieoj2
Quiz by rosieoj2, updated more than 1 year ago
rosieoj2
Created by rosieoj2 about 9 years ago
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Resource summary

Question 1

Question
what is the definition of magnification?
Answer
  • how big an object is
  • the difference between the size of the image and the size of the object
  • the degree to which the size of an image is larger than the object itself

Question 2

Question
what is the definition of resolution?
Answer
  • the degree to which it's possible to distinguish between to objects that are very close together
  • how detailed an image looks
  • how blurry an image looks

Question 3

Question
what is the resolution and magnification of a light microscope?
Answer
  • res = 2000 nm, mag = x2000
  • res = 200 nm, mag = x 1500
  • res = 200 micrometres, mag = x2000

Question 4

Question
how many micro metres is one cm equivalent to?
Answer
  • one hundred thousand
  • one million
  • ten thousand

Question 5

Question
how many nanometres is one cm equivalent to?
Answer
  • ten million
  • one million
  • one hundred million

Question 6

Question
what is the maximum magnification and resolution of a scanning electron microscope?
Answer
  • mag = x500 000, res = 0.2 nm
  • mag = x 500 000, res = 2 nm
  • mag = x100 00, res = 0.2 nm

Question 7

Question
what is the maximum magnification and resolution of a transmission electron microscope?
Answer
  • mag = x500 000, res = 0.2 nm
  • mag = x 100 000, res = 0.2 nm
  • mag = x500 000, res = 2 nm

Question 8

Question
what is a disadvantage of an electron microscope?
Answer
  • samples need to be prepared in a vacuum so electron beam is not deflected by molecules in the air
  • it has a maximum resolution which is 1000 times greater than a light microscope
  • it needs to be cleaned in ethanol daily

Question 9

Question
what is the cytoskeleton made of?
Answer
  • carbohydrate strings
  • protein fibres
  • phospholipids

Question 10

Question
what is the main role of the cytoskeleton?
Answer
  • provide stability for the cell
  • control what substances enter or leave the cell
  • restrict the movement of hydrophilic substances past the cell

Question 11

Question
how are microtubules arranged inside flagella and cilia?
Answer
  • in a ring of 9
  • in a ring of 11 with 1 in the centre
  • in a ring of 9 with 2 in the centre

Question 12

Question
what are plant cell walls made of?
Answer
  • murein
  • cellulose
  • amylose

Question 13

Question
what is the function of lysosomes?
Answer
  • to packages and modify proteins
  • produce ATP during respiration
  • contain a powerful digestive enzyme to break down waste materials

Question 14

Question
what is the highly folded inner membrane of a mitochondria called?
Answer
  • cristae
  • matrix
  • epithelium
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