Required Practical: Microscopy (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Which stain is used to make plant cells more visible when preparing an onion epidermis slide?
Which stain is used to make plant cells more visible when preparing an onion epidermis slide?
Iodine solution
Which stain is used to highlight the structures of animal cells such as cheek cells?
Which stain is used to highlight the structures of animal cells such as cheek cells?
Methylene blue
What magnification should you start with when using a light microscope?
What magnification should you start with when using a light microscope?
Lowest magnification
Which focus knob is used first to bring the microscope image into general focus?
Which focus knob is used first to bring the microscope image into general focus?
Coarse focus knob
What is the purpose of the fine focus knob on a microscope?
What is the purpose of the fine focus knob on a microscope?
To sharpen the image
Which structure is present in plant cells but NOT in animal cells?
Which structure is present in plant cells but NOT in animal cells?
Cell wall
What are the three main structures to identify in animal cells?
What are the three main structures to identify in animal cells?
Cell membrane, cytoplasm, nucleus
What is the formula for calculating magnification?
What is the formula for calculating magnification?
How do plant cells appear in terms of shape compared to animal cells?
How do plant cells appear in terms of shape compared to animal cells?
Regular shape
Which structures are absent in animal cells but present in plant cells?
Which structures are absent in animal cells but present in plant cells?
Cell wall and chloroplasts
Why are stains like iodine and methylene blue used in microscopy?
Why are stains like iodine and methylene blue used in microscopy?
To enhance visibility of structures
How do you calculate total magnification if you know the objective and eyepiece lens values?
How do you calculate total magnification if you know the objective and eyepiece lens values?
Multiply them together