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Describe how deoxygenated blood flows through the heart

Deoxygenated blood from the body flows into the right atrium via the vena cava. The right atrium contracts, forcing open the tricuspid valve. This allows...

Answered by Anna F. Biology tutor
2336 Views

Describe the processes that occur during the first division of meiosis.(6 marks)

The first division of meiosis consists of the stages, interphase, prophase, metaphase, anaphase and telophase. During interphase, growth of the cell and more importantly, DNA replication occurs. After DNA...

Answered by Orla F. Biology tutor
9666 Views

Describe the process of genetic engineering and give an example of something this can be used to produce.

Genetic engineering is a biotechnology technique where DNA from one organism is transferred to another organism. The reason we use this technique is so the organism that receives DNA becomes genet...

Answered by Michael C. Biology tutor
4404 Views

A mutation of a tumour suppressor gene can result in the formation of a tumour. Explain how. Not all mutations to the gene result in a tumour. Explain how.

To answer this two-part question students must be able to understand two concepts: what a gene can do; and what constitutes a gene.

For the first part, a mutation in the genetic code of the tumour ...

Answered by Luke Y. Biology tutor
7108 Views

What is the role of phospholipids present in cell membranes?

So if we start off by looking at the structure of a typical phospholipid inside a cell membrane, we can see that it is made up of two components: a hydrophilic phosphate head, which means it is 'water lov...

Answered by Shraya P. Biology tutor
5132 Views

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