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Biology

A Level

How can urine be used to detect pregnancy?

The hormone Human Chorionic Gonadotrophin (HCG) starts to be secreted six days after conception from a developing embryo. A pregnancy test stick has three bands. In the first are monoclonal antibodies whi...

Answered by Aimee W. • Biology tutor

4341 Views

What is the differences between mitosis and meiosis?

Mitosis and meiosis are both processes which describe the production of new cells. Mitosis produces 2 daughter cells which are genetically identical to the parent cell. Each daughter cell is ...

Answered by Jennifer T. • Biology tutor

448091 Views

Explain the all-or-nothing principle for an action potential.
In the resting state, the membrane potential of a neuron is around -70 millivolts (mV). When acted upon by a stimulus, the membrane depolarises as Na
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Answered by Oyku C. • Biology tutor
62276 Views
How does glycolysis produce ATP?
Glycolysis produces energy through the form of ATP. ATP is created directly from glycolysis through the process of substrate-level phosphorylation (SLP) and indirectly by oxidative phosporylation (OP). Th...
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Answered by Charlie H. • Biology tutor
35071 Views
Describe how a student wouldn’t test for the presence of lipid molecules in a sample of food
The student would conduct an emulsification test. First of all, crush the sample to increase is surface area. Next add the sample to a test tube of ethanol, allowing for he sample to disolve before addin...
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Answered by Tobias S. • Biology tutor
2687 Views
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Top answers

How can urine be used to detect pregnancy?

What is the differences between mitosis and meiosis?

Explain the all-or-nothing principle for an action potential.

How does glycolysis produce ATP?

Describe how a student wouldn’t test for the presence of lipid molecules in a sample of food

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