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Biology
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Describe the stages of transcription

Transcription begins with DNA helicase unwinding the DNA into two seperate strands.As the DNA unwinds, RNA nucleotides form hydrogen bonds with their complementary base pairs. Uracil binds to adenine, and...

EA
Answered by Edward A. Biology tutor
2675 Views

Explain how you would test for the presence of lipids and proteins in an unknown solution. Give details on any observations you would expect to make.

To test for the presence of lipids, you would carry out the emulsion test. To do this, you take the sample and mix it with equal volumes of ethanol and water followed by shaking. A cloudy white emulsion w...

CJ
Answered by Chelsea J. Biology tutor
57355 Views

What are the main differences between Type 1 and Type 2 Diabetes?

Type 1 diabetes presents younger than type 2, and results from an autoimmune reaction of the pancreas. This means patients have no insulin available to store glucose as glycogen. Type 2 diabetes presenets...

RK
Answered by Rahul K. Biology tutor
1613 Views

How are grana adapted to their function in photosynthesis? [2 marks]

  1. They contain photosynthetic pigments to absorb light i.e. chlorophyll a2. They have a large surface area for light absorption3. They contain electron carriers / ATP synthase
AI
Answered by Amaani I. Biology tutor
8132 Views

What is the function of the mitochondria?

The mitochondria is an organelle in the cell which is used as a "power station" to provide the cell with energy in the form of ATP. It uses substrates like glucose, which is broken down in the c...

HA
Answered by Hamzah A. Biology tutor
2616 Views

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