Name the type of enzyme that is used to cut the gene for Factor IX from human DNA
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Card 7
Front
Suggest one reason why very few live births result from the many embryos that are implanted.
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Card 8
Front
Adrenaline binds to receptors in the plasma membranes of liver cells. Explain how this causes the blood glucose concentration to increase.
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Card 9
Front
Selective breeding can be used to produce cows with desirable features. This involves mating cows with bulls. Suggest how a bull is selected to increase the probability of producing cows with a high milk yield.
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Card 10
Front
Explain the difference between pre-mRNA and mRNA
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Card 11
Front
Describe how hormones are different in the cells they affect
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Card 12
Front
Describe how hormones and local chemical mediators reach the cells they affect
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Card 13
Front
Synapses are unidirectional. Explain how acetylcholine contributes to a synapse being unidirectional
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Card 14
Front
Name the process by which IAA moves from the growing regions of a plant shoot to other tissues.
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Card 15
Front
Farmers sometimes give progesterone to sheep to prevent ovulation. Explain how progesterone prevents ovulation.
