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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 maltose2) Only maltose can bind...

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 va...

Answered by Jessica L. • Biology tutor

3278 Views

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 ...

Answered by Simmy W. • Biology tutor

2263 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 pit...

Answered by Valeriya K. • Biology tutor

2728 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 th...

Answered by Nirali V. • Biology tutor

2780 Views