Edexcel A2 Unit 4: The Natural Environment and Species

Topic 6: Questions 1-30

Topic 5: Questions 31-50

?
Name one method used to obtain the core temperature of the body?
Abnominal Stab
1 of 45
Stiffening of the muscles after death is called?
Rigor Mortis
2 of 45
What is the optimum temperature for DNA Polymerase during PCR?
70
3 of 45
What is an intron?
A non-coding region of DNA
4 of 45
When DNA is extracted what solution is used to precipitate out the DNA?
Ethanol
5 of 45
A sigmoid cure goes from 37'C to what temperature?
Ambient
6 of 45
What substance causes putrefaction during decomposition?
Sulphaemoglobin
7 of 45
What makes gram positive bacteria different from gram negative bacteria?
Gram positive bacteria contain extra peptidoglycan
8 of 45
Define Antigen.
A foreign substance which stimulates an immune response
9 of 45
How do bacteria asexually reproduce?
Binary fission
10 of 45
Name an antimicrobial protein.
Interferon
11 of 45
What do lysozomes do?
Break down cell walls
12 of 45
What do damaged white blood cells release during inflammation?
Histamines
13 of 45
What is the most abundant form of phagocyte?
Neutrophil
14 of 45
Where are T cells produced?
Bone Marrow
15 of 45
Where do B cells mature?
Bone Marrow
16 of 45
What form of bonds keep the antibody structure stable?
Disulphide bridges
17 of 45
What is a granuloma tissue?
A collection of modified macrophages, surrounded by a rim of lymphocytes
18 of 45
What receptors on a HIV virus bind with a T helper cells' CD4 receptors?
GP 120
19 of 45
How many tRNA molecules can fit in a ribosome at once during translation?
2
20 of 45
During transcription, what enzyme catalyses the process?
DNA polymerase
21 of 45
How long does the chronic stage of HIV normally last?
5-20 years
22 of 45
What protein does the skin contain to stop pathogens entering the body?
Keratin
23 of 45
Where are the gastric glands which contain hydrocloric acid found?
Stomach
24 of 45
What form of immunity would an MMR vaccine be?
Artifical Active
25 of 45
What form of antibiotics stop the multiplication of bacteria?
Bacteriostatic
26 of 45
What is the bursting of a cell called?
Lysis
27 of 45
What type of factor is an Abiotic factor?
Non-living
28 of 45
A belt transect is what form of sampling?
Systematic
29 of 45
In primary succession what is the final result?
Climax Community
30 of 45
In photosynthesis, what % of light is absorbed by the chlorophyll molecule?
40%
31 of 45
What is the optimum wavelength for light to be absorbed by the chloroplast?
460nm
32 of 45
What is the name of the enzyme used to produce ATP?
ATPsynthase
33 of 45
What is the name for the 'splitting of water' by light?
Photolysis
34 of 45
What kind of reactions does ATP initiate in the Calvin Cycle?
Redox
35 of 45
What is the standard equation for the energy flow within photosynthesis?
GPP= NPP + Respiration
36 of 45
What trophic name would be given to a plant which is a producer in a food web?
Photo-autotroph
37 of 45
What is the name given to 'tree ring analysis'?
Dendrochronology
38 of 45
What technique is used to date pollen sediment cores?
Carbon-14 dating
39 of 45
What do 'greenhouse gases' do?
Absorb infrared radiation
40 of 45
Apart from Carbon Dioxide, Methane, Nitrous Oxide and Water Vapour; name another 'greenhouse gas'.
CFCs
41 of 45
What is Phenology?
The study of seasonal events in the lives of animals and plants
42 of 45
What type of speciation would geographical isolation cause?
Allopatric Speciation
43 of 45
Hybrid Inviability occurs when what happens?
Zygote fails to divide
44 of 45
A Biofuel is any source of energy produced from what form of photosynthesis?
Recent photosynthesis
45 of 45

Other cards in this set

Card 2

Front

Stiffening of the muscles after death is called?

Back

Rigor Mortis

Card 3

Front

What is the optimum temperature for DNA Polymerase during PCR?

Back

Preview of the front of card 3

Card 4

Front

What is an intron?

Back

Preview of the front of card 4

Card 5

Front

When DNA is extracted what solution is used to precipitate out the DNA?

Back

Preview of the front of card 5
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