Question 1

Which scientist is credited with using a crude microscope to observe and describe cells for the first time?

Accepted Answer

Robert Hooke

Question 2

Anton van Leeuwenhoek improved upon earlier microscopes. What was a major result of his work?

Accepted Answer

He was able to see blood cells, sperm, and water-dwelling microorganisms.

Question 3

Which of the following best describes the phenomenon of 'emergence' in biology?

Accepted Answer

It arises from the interactions of many components of a cell.

Question 4

What is the main difference between magnification and resolution in microscopy?

Accepted Answer

Magnification increases object size, while resolution is a measure of the clarity of an image.

Question 5

Which of the following statements is a claim of the Cell Theory?

Accepted Answer

All living things are composed of cells.

Question 6

What is the function of using a beam of electrons instead of light in microscopy?

Accepted Answer

To see tiny cell structures with higher resolution.

Question 7

If a microscope has a magnification of $$400	imes$$ and a resolution of $$0.2\ \mu m$$, what does this mean?

Accepted Answer

Objects appear 400 times larger and details as small as $$0.2\ \mu m$$ can be distinguished.

Question 8

Which of the following is NOT a component of the Cell Theory?

Accepted Answer

Cells can spontaneously generate from non-living material.

Question 9

Why is resolution important in microscopy?

Accepted Answer

It determines the smallest distance between two points that can be distinguished as separate.

Question 10

Which type of microscope would you use to observe the detailed internal structure of a mitochondrion?

Accepted Answer

Transmission electron microscope

Question 11

A scientist wants to observe living cells in real time. Which microscope should they use?

Accepted Answer

Compound light microscope

Question 12

Which of the following best explains why cells are considered the basic unit of life?

Accepted Answer

Cells are the smallest entities that can carry out all life processes.

Question 13

If a cell is observed to have ribosomes, what can be inferred about its function?

Accepted Answer

It can synthesize proteins.

Question 14

Which of the following is a reason why electron microscopes can achieve higher resolution than light microscopes?

Accepted Answer

Electrons have a shorter wavelength than visible light.

Question 15

Which statement about cell walls is correct?

Accepted Answer

Cell walls enclose and support plant cells.

Question 16

A student observes a specimen under a microscope and notes the presence of a nucleus and ribosomes. What type of cell is this most likely?

Accepted Answer

Eukaryotic cell

Question 17

Which of the following best describes the role of ribosomes in a cell?

Accepted Answer

They synthesize proteins from amino acids.

Question 18

Which of the following is a correct sequence of events in the history of cell discovery?

Accepted Answer

Hooke observes cells, Leeuwenhoek refines microscope, Cell Theory is developed.

Question 19

Which property of light is most important for achieving high resolution in light microscopy?

Accepted Answer

Wavelength

Question 20

Which of the following is a limitation of light microscopes compared to electron microscopes?

Accepted Answer

Light microscopes cannot resolve structures smaller than about $$200\ nm.$$

Cell Structure and Microscopy: A Tour of the Cell

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