Edexcel A2 Unit 4: The Natural Environment and Species

Topic 6: Questions 1-30

Topic 5: Questions 31-50

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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
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What do damaged white blood cells release during inflammation?
Histamines
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What is the most abundant form of phagocyte?
Neutrophil
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Where are T cells produced?
Bone Marrow
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Where do B cells mature?
Bone Marrow
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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
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What receptors on a HIV virus bind with a T helper cells' CD4 receptors?
GP 120
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How many tRNA molecules can fit in a ribosome at once during translation?
2
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During transcription, what enzyme catalyses the process?
DNA polymerase
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How long does the chronic stage of HIV normally last?
5-20 years
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What protein does the skin contain to stop pathogens entering the body?
Keratin
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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
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What form of antibiotics stop the multiplication of bacteria?
Bacteriostatic
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What is the bursting of a cell called?
Lysis
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What type of factor is an Abiotic factor?
Non-living
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A belt transect is what form of sampling?
Systematic
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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%
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What is the optimum wavelength for light to be absorbed by the chloroplast?
460nm
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What is the name of the enzyme used to produce ATP?
ATPsynthase
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What is the name for the 'splitting of water' by light?
Photolysis
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What kind of reactions does ATP initiate in the Calvin Cycle?
Redox
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What is the standard equation for the energy flow within photosynthesis?
GPP= NPP + Respiration
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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
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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
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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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