Pre-work quiz week 1 Cells

Which is the correct formula for calculating the magnification of an image?

• Magnification = Image (measured) divided by actual

• Magnification = Image (measured) multiplied by actual

• Magnification = Actual divided by image (measured)

• Magnification = Actual multiplied by image (measured)

Which of the following are advantages of electron microscopes over light microscopes?

• Lower magnification

• Higher magnification

• Lower resolution

• Higher resolution

Which of these are disadvantages of an electron microscope?

• Higher resolution

• Higher magnificaiton

• Complex preparation

• Large & more expensive

What is 3 cm in micrometres?

Why are stains sometimes added to specimens when viewing them under an optical microscope? Choose two answers.

• To add contrast

• To make them look pretty

• To make certain cell structures invisible

• To make certain cell structures visible

When drawing biological diagrams, which rules should be followed?

• Shading should be included

• Lines can be sketched

• Label lines should be separate and not cross over

• A title is needed that includes magnification or size

What is A?

• Nucleus

• Cytoplasm

• Mitochondrion

• Ribosomes

• Cell membrane

What is B?

• Nucleus

• Cytoplasm

• Mitochondrion

• Ribosomes

• Cell membrane

What is C?

• Nucleus

• Cytoplasm

• Mitochondrion

• Ribosomes

• Cell membrane

What is D?

• Nucleus

• Cytoplasm

• Mitochondrion

• Ribosomes

• Cell membrane

Answer explanation

Remember! If it points to ONE it is a mitochondrion. If it points to more than one it becomes mitochondria!