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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...
AW
Answered by Amy W. • Biology tutor
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Explain the similarities and differences between plant and animal cells structure and shape (may include use of a diagram and bullet points are accepted).

The similarities are:Cell cytoplasmNucleusCell membraneMitochondriaRibosomesStructures unique to plant cells (with a few exceptions):ChloroplastsCell wallsLarge permanent vacuoleAnimal cells tend to be varia...
JL
Answered by Jessica L. • 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...
SW
Answered by Simmy W. • Biology tutor
3211 Views

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...
VK
Answered by Valeriya K. • Biology tutor
4142 Views

Give a basic overview of the of the digestive system.

The digestive system is a tube starting from the mouth and ending at the anus. Between are different compartments with different roles. The first stage of digestion occurs in the mouth. The teeth grind the f...
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Answered by Nirali V. • Biology tutor
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