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When both sodium and Hydrochloric acid are added to a test tube, what will be observed?

When a Metal and acid react together they form a salt, and hydrogen gas. You can't really see the salt when is is formed, as salts dissolve in solution. However you can see the hydrogen gas bubbles. So fizzi...
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To what extent did the arms race exacerbate tensions between the USA and USSR during the Cold War?

Essay Plan-Firstly, introduce the answer by giving an overview of the arms race. It began with the USSR successfully testing an atomic bomb in 1949 and was a key feature of the struggle for supremacy through...
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Explain the importance of mRNA in the process of protein synthesis and problems that can occur if there is a problem with the mRNA template?

mRNA serves as the template from which the tRNA will join to, during the process of translation, to form the polypeptide chain and eventually the protein. if the template is wrong or missing the desired prot...
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How do signals cross a synapse

action potential arrives at post synaptic terminal 2. voltage gated calcium channels open 3. calcium enters presynaptic neuron and move to neurotransmitter vesicles 4. vesicles move to membranes and dock 5. ...
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Answered by Sian R. • Biology tutor
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Contrast the processes of facilitated diffusion and active transport (3 marks)

Note that the question is 3 marks. Also note the question uses the word 'contrast' so you must talk about both processes. Cells must communicate with their external environment and vice versa, therefore, sub...
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