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Card 36

Front

Describe how hormones and local chemical mediators reach the cells they affect.

Back

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Card 37

Front

Synapses are unidirectional. Explain how acetylcholine contributes to a synapse being unidirectional.

Back

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Card 38

Front

IAA is a specific growth factor. Name the process by which IAA moves from the growing regions of a plant shoot to other tissues.

Back

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Card 39

Front

When a young shoot is illuminated from one side, IAA stimulates growth on the shaded side. Explain why growth on the shaded side helps to maintain the leaves in a favourable environment.

Back

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Card 40

Front

Explain the effect of temperature on the rate at which NAA is taken up by the lower surface of the leaf.

Back

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Card 41

Front

Suggest how these differences in the cuticle might explain the differences in rates of uptake of NAA by the two surfaces.

Back

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Card 42

Front

Transcriptional factors are important in the synthesis of particular proteins. Describe how.

Back

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Card 43

Front

At high temperatures, a desert iguana keeps its mouth wide open and breathes in and out rapidly. This is called panting. Explain how panting helps to reduce the body temperature of an iguana.

Back

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Card 44

Front

Hydrolysis and condensation are important in the formation of new adult proteins. Explain how.

Back

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Card 45

Front

what enzyme is use in the transcription of DNA?

Back

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