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Describe how you can distinguish between a bacterium and a virus.

Viruses are generally smaller than bacteria and are not living, whereas bacteria are considered as living species as a prokaryote. Viruses have no cytoplasm, cell membranes or cell wall and instead have a pr...
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Answered by Keshana K. • Biology tutor
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What is the difference between mitosis and meiosis?

Mitosis is a process associated with organism growth, and it involves a tetraploid cell dividing to give two genetically identical diploid cells. Meiosis is the process by which gametes are formed, and it in...
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What is the refractory period of a nerve action potential?

The refractory period is composed of two parts. The first part is the absolute refractory period in which another action potential cannot be stimulated in the nerve. In the relative refractory period that fo...
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Answered by Karthik K. • Biology tutor
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Describe the events which normally occur between the arrival of an action potential at the synaptic knob and its transmission across a neuromuscular junction.

Voltage gated calcium channels open in response to the action potential reaching the presynaptic knob. Calcium ions diffuse into the celll down their concentration gradient. This results in synaptic vesicels...
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Answered by Victoria S. • Biology tutor
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How is DNA replicated?

Scientists have proposed several models of DNA replication but the currently accepted model is called the 'Semi-Conservative' model. The Semi-Conservative model of DNA replication was discovered by two scien...
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Answered by Gurpreet D. • Biology tutor
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