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What is a mutation and what are they caused by?

A mutation is a change in the base sequence of DNA. A mutation can be caused by a mistake during replication of DNA or by mutagenic agents. Mutagenic agents include chemicals that can act as bases or radiati...
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Answered by Nadine K. • Biology tutor
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NaOH is a strong base. An aqueous solution is made containing 0.300mol.dm^-3 of NaOH at room temperature. Calculate the pH of this solution.

Concentration of NaOH=Concentration of OH- ions (NaOH is a strong base) Kw=1x10^-14 (at room temperature/25 degrees) using Kw=[H+][OH-] We can figure out the [H+] [H+]=Kw/[OH-] [H+]=(1x10^-14) / (0.300) Now ...
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Answered by Nadine K. • Chemistry tutor
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What is an optical isomerism?

Optical isomerism is a type of stereoisomerism which includes a chiral carbon. This means the pair of molecules have the same structural formula but the four different groups around the carbon atom are arran...
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Answered by Nadine K. • Chemistry tutor
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What is transcription?

Transcription is the process of making DNA into mRNA. DNA first has to be transcribed into messenger RNA (mRNA), this mRNA can then be translated into a protein (amino acids). DNA Polymerase (an enzyme) bind...
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Answered by Nadine K. • Biology tutor
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What does homeostasis involve and how is this achieved? Explain.

For IB short answer questions, the command term is almost as important as the content of the subject itself. Here, "explain" highlights to you that an in depth answer with examples is required to g...
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