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Describe and explain the process of insulin secretion

Beta cells store insulin in vesiclesAt normal blood glucose concentration (BGC), K+ channels are open, so K+ can diffuse out of the cell to maintain the potential difference (PD) at -70mVWhen the BGC rises, ...
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Answered by Summia H. • Biology tutor
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How do I answer a long answer question so that I get all of the marks?

Long answer questions (6+ marks) can normally be split into 3 marks for basic content and 3 marks for reasons. Long answer questions will also be assessed on quality of written communication - this means how...
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Answered by Jenny A. • Biology tutor
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What is the enzyme lock and key mechanism?

Enzymes are proteins and they have specific shapes. Do you know what active site is? Region where the chemical reaction happen, this is a different shape on different enzymes Do you know what substrate is? S...
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Answered by Millie B. • Biology tutor
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How does an adult develop immunity to a toxin (3 marks)

They must first become exposed to the bacteria or pathogen that produces the toxin. This will either be though encountering it naturally or through a vaccination. Once the pathogen has entered their body the...
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Answered by Lexie H. • Biology tutor
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Describe the role of tRNA in the production of a protein

tRNA molecules transport a specific amino acid to a ribosome for translation of mRNA. A tRNA molecule carries an anti-codon (at the opposite end of the amino acid) that pairs with the codon on mRNA via compl...
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Answered by Megan W. • Biology tutor
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