Top answers

What is active transport?

The movement of molecules against their concentration gradient (low concentration to high concentration), across a membrane using energy.
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Answered by Bella S. • Biology tutor
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What happens in prophase of mitosis?

The chromosomes condense and the nuclear membrane breaks down and the nucleolus disappears.
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Answered by Lucy O. • Biology tutor
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Describe the structures of proteins.

Proteins are made up of the primary structure, secondary structure and tertiary structure. Some proteins may also have a quaternary structure. The primary structure is the specific sequence of amino acids, p...
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Answered by Lucy O. • Biology tutor
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Explain what happens at a synapse with the use of a labelled diagram

The electrical signal arrives at the first neuron. Neurotransmitters are released into cleft.They diffuse across the cleft and bind to receptors on the 2nd neuron.Electrical impulse is generated in second ne...
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Answered by Connor F. • Biology tutor
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Describe two differences between mitochondria and prokaryotic cells such as bacteria?

Mitochondria: (statements should be comparative)Has a double membrane;No cell wall;No capsule;No flagellum/ pili;No mesosome;No plasmids
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Answered by Abigail G. • Biology tutor
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