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What is the action of Insulin in glucose regulation?

Insulin is a hormone that is produced by beta cells in the Islets of Langerhans in the pancreas. A hormone is a chemical substance that is transported in the blood and stimulates particular cells to perform ...
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Answered by Nicole M. • Biology tutor
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What is the process of mitosis?

A useful mnemonic to remember the stages of mitosis is PMAT. Don’t forget that the cell spends most of its time in interphase, the phase where the DNA is replicated, before moving to mitosis.Prophase- chromo...
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Answered by Caroline H. • Biology tutor
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Describe how mRNA is produced in the nucleus of a cell.

The process in which mRNA is produced is called transcription.Firstly, DNA Helicase breaks Hydrogen bonds to unzip the DNA molecule and expose the base pairs. Then nucleotides enter through nuclear pores and...
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Answered by Joana S. • Biology tutor
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This question is on meiosis: Variation occurs during meiosis, give the two ways this happens (include the phases where it occurs) (4 marks)

During prophase 1, homologous chromosomes will pair up to form a bivalent, this is where crossing over can occur. Chromatids will twist around each other and will break and reform, resulting in crossing over...
Answered by • Biology tutor
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Name two features of plant cells that are not features of animal cells

Chloroplasts, a plastid which contains chlorophyll and in which photosynthesis takes place. A large/permanent vacuole. Cellulose/a cell wall. Plasmodesmata.
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Answered by Fergus B. • Biology tutor
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