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A-Level Biology - Action Potentials, DNA & Enzymes

Last updated about 4 years ago

7 Nsɛmmisa

Akwankyerɛ

Answer all the questions below.

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Use the interactive to explore ion movement during an action potential and answer the questions that follow.

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1.

What is the ion distribution when the neuron is at rest?

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2.

View the potential chart as you stimulate the neuron. The upwards deflection is caused by the movement of sodium ions into the neuron.

Nokorɛ

Ɛnyɛ ampa

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3.

Describe the movement (and mechanism) of the ions during the action potential.

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4.

Use the data provided to plot the graph.

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5.

Use the graph from the previous question to calculate the rate of reaction 10, 80 & 140 seconds after the start. Show all your working.

Watch this video and answer the questions that follow.

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6.

What name is given to the mode of replication of DNA?

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7.

Click on a base that represent adenine.