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Biology Class Experiments
Lecturing students and to “go over” the material that are already highlighted in the textbooks, and to remember these ideas until the term end is a tiresome and a boring task. It is important to engage students in active learning activities to apply their natural curiosity in the current affairs. Conducting experiments in subjects like biology in the class, with discussions is an effective way to move from passive to active learning.
Here is an example of biology class experiments which can help you study the concept better.
The following is a plan to perform a class experiments on DNA extraction. You will learn how to extract DNA from some of your cells.
DNA Extraction from your Cells.
- The cells from the lining of your mouth or cheek can come off easily. You can collect cells than contain your DNA by just swishing a liquid around your mouth.
- By doing this you get your cells and other unwanted debris in the liquid. To extract your DNA from your cells, the cells must be separated from the other biological molecules in the cells.
- Some basic steps followed to extract DNA can be used here, 3 easy steps to extract the DNA are the usage of Detergents, enzymes and alcohol.
- Use a cup with sports drink to obtain cells from your cheek. Swish the sports drink around in your mouth with force for at least one minute, and then spit back into the cup.
- Take a test tube add a small amount of detergent into it, now carefully pour the liquid containing your cheek cells into the test tube until the tube is half full.
- Add a pinch of enzyme to your test tube and mix it by gently inverting the tube five times. Let this mixture to rest for 10 minutes.
- Use a pipette and slowly add cold alcohol into the test tube on sides of the test tube; it forms a layer on top of the soapy liquid. Add about 2cm of alcohol on the tube. Do not disturb the test tube for 10 minutes.
- The DNA molecules will clump together and you will be able to see these clumps of DNA as white strands.