Q: Which of the following equations correctly represents the relationship for total magnification in light microscopy?

$$Total\ Magnification = Objective\ Lens\ Magnification \times Ocular\ Lens\ Magnification$$

Question 1

Which of the following best describes the function of the nucleolus within a eukaryotic cell?

Accepted Answer

Acts in the synthesis of ribosomes

Question 2

A scientist observes a tissue sample under a microscope and notes a single layer of flat cells, all touching the basal lamina. Which type of epithelial tissue is being observed?

Accepted Answer

Simple squamous epithelium

Question 3

Which organelle is responsible for providing the majority of ATP used by the cell, and what is the name of its highly folded inner membrane?

Accepted Answer

Mitochondrion; cristae

Question 4

A cell is observed to have many ribosomes attached to a network of membranes. What is the primary function of this organelle?

Accepted Answer

Protein synthesis for export or membrane insertion

Question 5

Which of the following best explains why microvilli are important in certain epithelial cells?

Accepted Answer

They increase the surface area for absorption

Question 6

A patient has a genetic disorder affecting the function of lysosomes. Which of the following cellular processes is most likely to be impaired?

Accepted Answer

Digestion of cellular waste and foreign material

Question 7

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizes ribosomal RNA

Question 8

A tissue sample contains many layers of cells, with only the bottom row of cells touching the basal lamina. The cells at the free surface are flat. What type of tissue is this?

Accepted Answer

Stratified squamous epithelium

Question 9

Which of the following best describes the structure and function of centrioles?

Accepted Answer

Paired cylindrical structures involved in cell division

Question 10

A cell is observed to have a large number of mitochondria. Which of the following is the most likely explanation for this observation?

Accepted Answer

The cell is involved in active transport and requires large amounts of ATP

Question 11

Which of the following equations correctly represents the relationship for total magnification in light microscopy?

Accepted Answer

$$Total\ Magnification = Objective\ Lens\ Magnification 	imes Ocular\ Lens\ Magnification$$

Question 12

Which of the following best describes the difference between rough and smooth endoplasmic reticulum?

Accepted Answer

Rough ER has ribosomes attached and is involved in protein synthesis; smooth ER lacks ribosomes and is involved in lipid synthesis

Question 13

A cell is observed to have a large number of lipid droplets in its cytoplasm. Which type of inclusion is this, and what is its primary function?

Accepted Answer

Inclusion; acts as a storage site for lipids

Question 14

Which of the following best describes the function of the Golgi complex (apparatus)?

Accepted Answer

Modifies, sorts, and packages proteins for secretion or delivery to other organelles

Question 15

A sperm cell is able to move due to the presence of which cellular structure, and what is its arrangement?

Accepted Answer

Flagellum; 9+2 arrangement of microtubules

Question 16

Which of the following is a key distinguishing feature of pseudostratified columnar epithelium with cilia?

Accepted Answer

All cells reach the basal lamina, but not all reach the free surface; nuclei are at different levels

Question 17

Which of the following best describes the function of peroxisomes in the cell?

Accepted Answer

Contain oxidative enzymes and catalase to break down hydrogen peroxide

Question 18

A tissue sample is observed to have many layers of cells, with the bottom row of cells touching the basal lamina and the cells at the free surface appearing dome-shaped when relaxed. What type of tissue is this?

Accepted Answer

Stratified transitional epithelium

Question 19

Which of the following best explains why not all cells in the human body have the same shape?

Accepted Answer

Cell shape is determined by the function of the cell and the tissue in which it is found

The Cell and Epithelial Tissues: Structure, Function, and Identification

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