Question 1

Which type of microscope would be most appropriate for observing the dynamic movement of mitochondria within a living cell?

Accepted Answer

Light microscope (LM)

Question 2

A scientist wants to study the surface structure of pollen grains at very high resolution. Which microscopy technique should they use?

Accepted Answer

Scanning electron microscopy (SEM)

Question 3

Which of the following statements correctly describes the relationship between resolution and wavelength in microscopy?

Accepted Answer

Resolution is inversely proportional to wavelength

Question 4

If a light microscope has a maximum magnification of $$1,000	imes$$ and a minimum resolution of $$200$$ nanometers, which of the following cell structures would be difficult to visualize?

Accepted Answer

Ribosomes

Question 5

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

Accepted Answer

Cannot be used to observe live cells

Question 6

A cell biologist stains a thin section of a cell with heavy metals to visualize its internal structure. Which microscope is being used?

Accepted Answer

Transmission electron microscope (TEM)

Question 7

Which of the following is a feature shared by all cells, both prokaryotic and eukaryotic?

Accepted Answer

Phospholipid bilayer cell membrane

Question 8

In eukaryotic cells, where is most of the DNA located?

Accepted Answer

Nucleus

Question 9

Which of the following best explains why eukaryotic cells are generally larger than prokaryotic cells?

Accepted Answer

Eukaryotic cells contain many membrane-bound organelles

Question 10

A cell is observed to have a double membrane with pores, a nucleolus, and chromatin. Which organelle is being described?

Accepted Answer

Nucleus

Question 11

Which structure is responsible for synthesizing ribosomal RNA (rRNA) in eukaryotic cells?

Accepted Answer

Nucleolus

Question 12

Which of the following best describes the composition of chromosomes in eukaryotic cells?

Accepted Answer

DNA and histone proteins

Question 13

Which organelle is directly responsible for synthesizing proteins that are exported from the cell?

Accepted Answer

Bound ribosomes

Question 14

A pancreatic cell is specialized for secreting digestive enzymes. Which cellular feature would you expect to be especially prominent?

Accepted Answer

Prominent nucleolus and many bound ribosomes

Question 15

Which of the following statements about ribosomes is correct?

Accepted Answer

Ribosomes are composed of rRNA and proteins

Question 16

Which process occurs in the nucleus and results in the production of messenger RNA (mRNA)?

Accepted Answer

Transcription

Question 17

A cell is observed to have its DNA concentrated in a region not enclosed by a membrane. What type of cell is this?

Accepted Answer

Prokaryotic cell

Question 18

Which of the following best describes the function of the nuclear pore complex?

Accepted Answer

Regulates passage of large macromolecules between nucleus and cytoplasm

Question 19

Which of the following is a major component of the plasma membrane in all cells?

Accepted Answer

Phospholipids

Question 20

A scientist wants to visualize the three-dimensional organization of a living tissue sample with enhanced contrast. Which advanced light microscopy technique should they use?

Accepted Answer

Confocal microscopy

A Tour of the Cell: Microscopy and Cell Structure

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