Biology B1 revision

?
MICROSCOPY
.
1 of 41
How do you find the TOTAL magnification of an image?
Magnification of eyepiece lens x Magnification of objective lens
2 of 41
What do microscopes do?
They use lens to magnify images and also increase the resolution of an image.
3 of 41
What is resolution?
Resolution means how well a microscope distinguishes between two points that are close together. A high resolution means that the image can be seen more clearly and in more detail.
4 of 41
CELLS
.
5 of 41
What are prokaryotic cells?
Cells that do not contain a nucleus.
6 of 41
What are eukaryotic cells?
Cells that contain a nucleus.
7 of 41
Cell wall
Supports and protects the cell.
8 of 41
Cell membrane
Controls what substances enter and exit the cell.
9 of 41
Cytoplasm
Where chemical reactions happen in the cell.
10 of 41
Mitochondrion
Where aerobic respiration happens. (cell makes energy)
11 of 41
Nucleus
Contains DNA and chromosomes.
12 of 41
Ribosomes
Makes own protein - proteinsynthesis
13 of 41
Chloroplast - in plant cells
Contains chlorophyll (green pigment) and energy transferred from the sun - used for photosynthesis.
14 of 41
Vacuole
Stores cell sap.
15 of 41
Where would you find chlorophyll?
In the chloroplast.
16 of 41
Where would you find ribosomes?
In the cytoplasm.
17 of 41
Acrosome (head of sperm)
Helps the burrow through the jelly-like layer surrounding an egg cell.
18 of 41
Haploid cell
Contains one set of chromosomes because this is a gamete.
19 of 41
Long tail (sperm)
Moves from side to side so the whole cell swims forward.
20 of 41
Many mitochondria
Release a lot of energy quickly for the sperm to move.
21 of 41
Jelly-like layer
Protects the egg cell as it moves through the oviduct.
22 of 41
Diploid cells
Contains two sets of chromosomes.
23 of 41
Why does the jelly layer and cell membrane harden after the sperm cell and egg cell nucleus fuse?
It helps prevent a second sperm cell fertilising the egg.
24 of 41
ENZYMES
.
25 of 41
Enzyme
Biological catalysts that speed up chemical reactions in living things.
26 of 41
Active site
The part where it joins on to its substrate to catalyse the reaction.
27 of 41
Why do enzymes only work with one substrate?
Enzymes usually only work with one substrate and they usually both have a high specificity.
28 of 41
Polymers
Carbohydrates, Lipids, Proteins.
29 of 41
Monomers
Glucose, Fatty acids/Glycerol, Amino acids.
30 of 41
What enzyme do we have in our mouths?
Amylase.
31 of 41
What are enzymes made up of?
Proteins which are made up from amino acids.
32 of 41
What can affect the active site of an enzyme?
Temperature, pH, Substrate concentration, Enzyme concentration.
33 of 41
TESTING FOODS
.
34 of 41
What test do we use to identify Starch and what colour does it turn for a negative result and positive result?
Iodine test, Orange, Black/blue.
35 of 41
What test do we use to identify Protein and what colour does it turn for a negative result and positive result?
Biuret test, Pale blue, Purple.
36 of 41
What test do we use to identify Lipids and what colour does it turn for a negative result and positive result?
Ethanol Emulsion test, No reaction, Cloudy top.
37 of 41
What test do we use to identify Reducing sugars and what colour does it turn for a negative result and positive result?
Benedict's test, Blue, Orange.
38 of 41
TRANSPORTING SUBSTANCES
.
39 of 41
Diffusion
The movement of particles from a higher concentration to a lower concentration.
40 of 41
Osmosis
The movement of water particles from a higher water concentration to a lower water concentration through a semi-permeable membrane.
41 of 41

Other cards in this set

Card 2

Front

How do you find the TOTAL magnification of an image?

Back

Magnification of eyepiece lens x Magnification of objective lens

Card 3

Front

What do microscopes do?

Back

Preview of the front of card 3

Card 4

Front

What is resolution?

Back

Preview of the front of card 4

Card 5

Front

CELLS

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Microscopy resources »