A2 Biology OCR Unit 2 (Test 3)

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  • Created by: MJ
  • Created on: 31-05-13 20:07
Which types of muscle are striated?
Cardiac and Voluntary
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What is the benefit of intercalated discs?
Their fusion allows gap junctions between cells which helps ion diffusion, so action potentials can pass through quickly
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What is a neuromuscular junction?
A specialised synapse between a motor neurone and muscle fibre
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What is the neurotransmitter there?
Acetylcholine
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Why would we want to genetically engineer an organism? (2)
To improve a feature of the organism or engineer it to be able to synthesise useful products
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A transgenic organism
has DNA that has been genetically engineered
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What is heatshock?
Addition of calcium salts, temperature lowered and then risen suddenly 40C
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Heatshock is used to
Increase the rate at which bacteria take up plasmids
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What strain of Pheumococcus kills mice?
S
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iRNA is
Interference RNA that can bind to mRNA to silence harmful genes
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Explain augmentation.
Engineering a functional copy of gene into relevant specialised cells causing the correct, functioning polypeptide to be sythesised and normal cell processes
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How can cancers be treated?
Genetic techniques are used to make cancerous cells express genes that make proteins (such as cell surface antigens) which then make the cell known to the immune system
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What is a GMO?
A genetically modified organism
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A liposome is a type of
Vector
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What can vectors do?
Carry alleles/genes into the cell
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A liposome is made of
small pieces of lipid bilayer
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What are longer, primers or probes?
Probes
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Name the four ways of immobilising enzymes
Adsorption, Covalent bonding, Membrane seperation, Entrapment
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Name four examples of adsorption agents
porous carbon, clay, resins and glass beads
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Name the four growing factors of microorganisms in fermenters
Temperature, type/time of nutrient, o2 conc, pH
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Other cards in this set

Card 2

Front

What is the benefit of intercalated discs?

Back

Their fusion allows gap junctions between cells which helps ion diffusion, so action potentials can pass through quickly

Card 3

Front

What is a neuromuscular junction?

Back

Preview of the front of card 3

Card 4

Front

What is the neurotransmitter there?

Back

Preview of the front of card 4

Card 5

Front

Why would we want to genetically engineer an organism? (2)

Back

Preview of the front of card 5
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