Paper 1

Created by

Mariama Caton

Cards (107)

B1 1) What is the difference in magnificaiton in light and electron microscopes?
Cheap, easy to transport
B1 2) What is the difference in resolution between light and electron microscopes? 
less resolving power, less magnification
B1) 3) Define Magnification 
How many times larger something appears.
B1 4) What is a Micrograph?
Another word for a microscope image.
B1 5) Define resolution 
The ability to distinguish between two points.
B1 6) How do you work out Total magnification?
Magnification = magnification of eyepiece x magnification of objective lens.
B1 7) How do you work out magnification of image?
Magnification = size of image / size of real object
B1 11) What is the function of the Cell membrane? 
Surrounds the cell and controls the passage of substances into and out of the cell.
B1 12) What is the function of the Cell wall?
Found outside the cell membrane in plant and bacterial cells, provides support for the cell.
B1 13) What is the function of the Chloroplast?
Found in plant cells. Contain chlorophyll that absorbs light for photosynthesis.
B1 14) What is the function of the Cytoplasm?
Where most of the chemical reactions take place in a cell.
B1 15) What is a Eukaryotic cell? 
Type of cell that contains a nucleus
B1 16)What is the function of the Mitochondria?
Where aerobic respiration takes place.
B1 17)What is the function of the Nucleus?
Contains DNA and controls cell activities.
B1 18)What is the Plasmid? 
Small rings of DNA found in bacterial cells.
B1 19)What is a Prokaryotic cell?
Cells without a nucleus.
B1 20)What is the function of the Ribosomes? 
Where protein synthesis occurs.
B1 21)What is the function of the Vacuole?
Found in plant cells. Contain a fluid called cell sap.
B1 22)State three differences between animal and plant cells.
Plant cells have cell wall, chloroplasts and permanent vacuole.
B1 23)What substances make up plant cell walls?
Cellulose
B1 24)Some bacteria have an extra layer on top of their cell walls. What is the name of that layer?
Slime capsule
B1 25)Where does the genetic material of a prokaryotic cell exist? 
Cytoplasm
B1 26)State one organism that is prokaryotic 
Bacteria
B1 28)What is the function of the flagella? 
To allow cell to swim and to move around
B1 29)State one difference between animal and bacteria cells?
No cell wall and plasmid
B1 30)State one similarity between plant and bacteria cell?
Both contain a cell water but different material.
B1 31) What a difference between prokaryotic and eukaryotic cells?
Prokaryotic cell the genetic material is not inside the nucleus it is in a single DNA loop found free in the cyptoplasm.
B1 32)What is 1m in cm?
100 cm
B1 33)What is 1 cm in mm?
10 mm
B1 34)What is 1 mm in micrometres?
1000 micrometres
B1 35)What is 1 micrometre in nanometres?
1000 nm
B1 36) Put the following in order: micrometre, nanometre, centimetre, millimetre, metre.
Metre, centimetre, millimetre, micrometre and nanometre
B1 37) What is a specialised cell?
A cell that is specialised for a particular function (role)
B1 38) What is the function of red blood cells?
To carry oxygen around the body
B1 39)) How are red blood cells adapted?
Biconcave shape for a bigger surface area, no nucleus to fit more oxygen in, contains haemoglobin which attaches to oxygen.
B1 40) What is the function of sperm cells?
Carry the male genetic material to the egg
B1 41) How is the sperm cell adapted for its function?
Tail to swim, lots of mitochondria for energy, acrosome contains an enzyme to eat away at egg.
B1 42) What is the function of ciliated epithelial cell? 
Form lining of tubes in the lungs to move substances up
B1 43) How are epithelial cells adapted? 
Cilia (tiny hairs) to move mucus up and out of lungs
B1 44) What is the function of nerve cells?
Cells that send electrical messages to the brain and around the body to respond to the environment.