Microscope and Cell Observation Quiz

What is the function of the eyepiece in a microscope?

• To adjust the focus

• To magnify the image

• To provide illumination

• To hold the slide in place

Which part of the microscope is used for coarse focusing?

• Stage

• Objective lens

• Fine focus knob

• Coarse focus knob

What is the typical magnification of an eyepiece lens?

• x4

• x10

• x40

• x100

What is the first step in preparing a microscope slide with onion cells?

• Peel a thin layer of onion

• Focus the microscope

• Place the coverslip

• Add dye to the slide

Why is dye added to the onion cells on a slide?

• To increase the magnification

• To prevent the cells from drying out

• To enhance the visibility of cell parts

• To make the cells stick to the slide

What is the purpose of the coverslip in slide preparation?

• To provide illumination

• To magnify the cells

• To protect the microscope lens

• To flatten the sample and protect it

Which lens should you start with when setting up a microscope to observe cells?

• The highest power objective lens

• The lowest power objective lens

• The fine focus lens

• The eyepiece lens

What is the next step after obtaining a clear image using the coarse focus?

• Add more dye to the slide

• Use the fine focus for a sharper image

• Adjust the light source

• Switch to a higher power objective lens

Which cell part is found only in plant cells like onion cells?

• Nucleus

• Cytoplasm

• Cell wall

• Cell membrane

How do you calculate the total magnification of a microscope?

• Add the eyepiece and objective lens magnifications

• Multiply the eyepiece and objective lens magnifications

• Divide the eyepiece magnification by the objective lens magnification

• Subtract the objective lens magnification from the eyepiece magnification