1a & 1b – To Investigate Cells Using a Light Microscope (LC 2027) (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What is the total magnification with a eyepiece and objective lens?
What is the total magnification with a eyepiece and objective lens?
What colour does methylene blue stain the nucleus of cheek cells?
What colour does methylene blue stain the nucleus of cheek cells?
Dark blue
What colour does iodine solution stain the nucleus of onion cells?
What colour does iodine solution stain the nucleus of onion cells?
Orange
Which power should you start with when examining cells under a microscope?
Which power should you start with when examining cells under a microscope?
Lowest power
What is used to collect cheek cells from inside the mouth?
What is used to collect cheek cells from inside the mouth?
Cotton wool bud or wooden spatula
What shape do onion cells display when observed under a microscope?
What shape do onion cells display when observed under a microscope?
Rectangular
What shape are cheek cells when observed under a microscope?
What shape are cheek cells when observed under a microscope?
Irregular and flattened
Why is the cover slip lowered at an angle when preparing a slide?
Why is the cover slip lowered at an angle when preparing a slide?
To eliminate air bubbles
Which cell type has rigid cell walls?
Which cell type has rigid cell walls?
Onion cells only
What is the function of the diaphragm on a light microscope?
What is the function of the diaphragm on a light microscope?
Controls the amount of light
What is the function of the coarse focus knob?
What is the function of the coarse focus knob?
Major adjustments for approximate focus
Why must onion cells be placed on the slide quickly?
Why must onion cells be placed on the slide quickly?
They may curl up