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Biology
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Describe the sodium-potassium ion pump on cell plasma membranes (2 marks)

These pumps use ATP / active transport to move 3 sodium ions (Na+) out of the cell for every two potassium ions (K+) that move in.1 mark - idea of active transport / use of ATP1 mark...

Answered by Aarif A. Biology tutor
2479 Views

Describe the process of DNA replication.

DNA helicase unwinds the DNA double strand / causing hydrogen bonds between complimentary base pairs to break / both single strands used as templates / DNA replication is semi conservative and semi discon...

Answered by Leia Z. Biology tutor
2154 Views

Describe the Darwinian theory of natural selection (GCSE/A-Level)

Every individual of every species living on the planet has DNA, made up of sections called genes. Mutations to these genes occur over time, resulting in a change to an individual's behaviour or physiology...

Answered by Bill D. Biology tutor
2271 Views

What’s the difference between a eukaryote and a prokaryote?

A prokaryote will not contain membrane-bound organelles, whereas a eukaryotic cell will contain membrane-bound organelles.Examples of membrane bound organelles would be the nucleus, mitochondria and chlor...

Answered by Camilla M. Biology tutor
2379 Views

Explain the advantages of sexual reproduction in plants

A major advantage of sexual reproduction is the increased genetic diversity that it creates. This originates from novel genetic combinations that result from meiosis and the fusing of the gametes thus pro...

Answered by Iain B. Biology tutor
23413 Views

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