DNA from fruit
I can observe DNA extracted from fruit and identify the main apparatus and steps in the extraction method.
DNA from fruit
I can observe DNA extracted from fruit and identify the main apparatus and steps in the extraction method.
Lesson details
Key learning points
- DNA is a chemical substance that can be extracted from the cells of organisms such as fruit.
- DNA molecules cannot usually be seen with the unaided eye, but clumps of it can be seen when a lot of it is extracted.
- Observing or following an appropriate method to extract DNA from fruit (e.g. kiwi fruit).
- Discussion of apparatus and techniques used to filter the tissue and extract the DNA.
- Observing and describing the appearance of the DNA after extraction.
Common misconception
DNA is just 'genetic information' and not a substance; not all organisms contain DNA (e.g. plants).
The lesson demonstrates that DNA is a physical, chemical substance that can be extracted from cells, and shows that plants contain DNA.
Keywords
Cell - A cell is the smallest living building block of an organism, and it contains genetic material that provides the instructions used to build and control the organism.
DNA - Genetic material is made of a chemical substance called DNA, in which the instructions are stored using the genetic code.
Mortar and pestle - A mortar and pestle are used to crush and grind up solid samples.
Filter - To filter a mixture is to separate out insoluble particles from a liquid. It can be done using a funnel and filter paper.
Pipette - A pipette is used to transfer small quantities of liquid.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
Exit quiz
6 Questions
releases cells from the tissue
removes large pieces such as seeds
to add a small amount of salt
unwinds the DNA
breaks down cell membranes
DNA floats in it and forms clumps