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How do I analyse this graph?

Firstly, read and understand the background information given in the question. Now, look closely at the graph, observing the titles of both axis; it will be likely that you have seen or even constructed a si...
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Answered by Aysha M. • Biology tutor
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Name the first stage of mitosis, and describe what happens at this stage

The first stage of mitosis is ProphaseAt prophase...The already duplicated DNA within the nucleus condenses (coils up) to form sister chromatids, connected by a centromereThe nucleolus and nuclear envelope b...
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Answered by Lara Q. • Biology tutor
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Maltose is hydrolysed by the enzyme maltase. Explain why maltase catalyses only this reaction (3 marks)

The question is three marks, so should have three points.1) Active site of the enzyme has a specific shape / tertiary structure / complementary to maltose 2) Only maltose can bind / fit3) Forms an enzyme-sub...
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Answered by Amy W. • Biology tutor
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Describe the development and propagation of an action potential in response to a stimulus (6 marks)

1. stimulus excites membrane so Na + channels open, membrane becomes more permeable to Na + so Na + diffuse into neurone down electrochemical gradient. Inside of neuron becomes less -ve 2. Depolarisation : i...
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Answered by Simmy W. • Biology tutor
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Describe the relationship between different hormones regulating the menstrual cycle?

There are 4 main hormones regulating the menstrual cycle. We can split them into 2 groups: FSH (follicle stimulating hormone) and LH (luteinising hormone) made by the pituitary gland, and oestrogen and proge...
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Answered by Valeriya K. • Biology tutor
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