B1.1

Question 1

onion cell practical

Answer 1

-peel layer of onion skin
-place 2 drops of iodine
-place cover slip

Question 2

cheek cell practical

Answer 2

-swab inside of cheek and place on microscope slide
-place 2 drops of methylene blue stain
-place cover slip

Question 3

examples of eukaryotes

Answer 3

fungi, animal, plant cells

Question 4

characteristics of eukaryotes

Answer 4

have membrane bound organelles and DNA in a nucleus

Question 5

examples of prokaryotes

Answer 5

bacteria

Question 6

characteristics of prokaryotes

Answer 6

have DNA but not in a nucleus, also have plasmids and don’t have membrane bound organelles

Question 7

plasmids

Answer 7

loops of DNA

Question 8

types of electron microscopes

Answer 8

Transmission Electron Microscope- shows 2D images
Scanning Electron Microscope- shows 3D images

Question 9

characteristics of light microscopes

Answer 9

maximum resolution: 0.2μm
magnification: X150000
specimens dead or alive: both
is staining needed: yes & no
image 2D or 3D: 2D
colour: natural colour
cost: cheap

Question 10

characteristics of electron microscopes

Answer 10

maximum resolution: 0.1nm
magnification: 500000
specimens dead or alive: dead
is staining needed: yes
image 2D or 3D: 2D & 3D
colour: black and white or computer generated colour
cost: expensive

Question 11

example of membrane bound organelle

Answer 11

mitochondria

Question 12

nucleus

Answer 12

controls cell and contains genetic material

Question 13

cytoplasm

Answer 13

where chemical reactions take place

Question 14

cell membrane

Answer 14

barrier that controls what goes in and out of a cell

Question 15

mitochondria

Answer 15

site of respiration

Question 16

cell wall

Answer 16

provides structure

Question 17

vacuole

Answer 17

contains sap and provides support

Question 18

chloroplasts

Answer 18

contain chlorophyll and are site of photosynthesis