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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 - idea of 3 Na + and...
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Answered by Aarif A. • Biology tutor
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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 chloropl...
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Answered by Camilla M. • Biology tutor
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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 produc...
IB
Answered by Iain B. • Biology tutor
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What is the role of progesterone in the menstrual cycle?

The primary role of progesterone is to thicken the lining of the uterus in order to prepare for pregnancy. It thickens the endometrium that allows for implantation of the embryo. The progesterone also inhibi...
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Answered by Anna G. • Biology tutor
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What is the definition of osmosis?

There are some key components which define osmosis in relation to simple diffusion. Osmosis is the movement of specifically water. In addition, it occurs through water channels (aquaporins). Osmosis occurs d...
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Answered by Bea F. • Biology tutor
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