Lab Techniques in Biology
Careful method gives reliable results.
About this topic
Reliable biological investigations follow a careful method: identify variables (independent, dependent and controlled), repeat measurements, use appropriate equipment and record accurately. Skills include using a microscope, preparing slides with stains, serial dilutions, aseptic technique for culturing bacteria, and safety.
A fair test changes only one variable at a time. For example, to test how temperature affects enzyme activity, the independent variable is temperature, the dependent variable is the rate of reaction, and controls include pH, enzyme concentration and volume. Repeating results lets you calculate a mean and spot anomalies, increasing reliability.
Microscope work involves starting with low power, focusing with the fine adjustment and calculating magnification as image size divided by actual size. Aseptic technique, such as flaming the loop and taping dishes without sealing fully, prevents contamination and the growth of harmful pathogens. Food tests use Benedict's reagent for sugar, iodine for starch and biuret for protein.
Always wear eye protection, and assess risks. A common error is confusing accuracy, closeness to the true value, with precision, how close repeated values are to each other. Also, a good conclusion refers back to the data and the hypothesis.
Key ideas
- Microscope slides
- Aseptic technique
- Gel electrophoresis
Quick check
Use cases: where Lab Techniques in Biology helps
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Biology underpins medicine, farming, conservation and biotechnology.
Frequently asked questions
What is Lab Techniques in Biology?
Careful method gives reliable results.
What will I learn in Lab Techniques in Biology?
Microscope slides. Aseptic technique. Gel electrophoresis.
Is Lab Techniques in Biology part of Biology?
Yes. It is one of 150 Biology topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Lab Techniques in Biology lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Lab Techniques in Biology?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
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