Q: Which formula correctly represents the magnification of a microscope?

$$\text{Magnification} = \frac{\text{Image size}}{\text{Actual size}}$$

Question 1

Which of the following best explains why mitochondria and chloroplasts are considered to have originated via the endosymbiont theory?

Accepted Answer

They have their own DNA and ribosomes similar to bacterial versions.

Question 2

A scientist is using a microscope to observe the fine details of a cell’s organelles. Which type of microscopy should they use to achieve the highest resolution?

Accepted Answer

Electron microscopy

Question 3

Which organelle is primarily responsible for the synthesis and export of proteins that are destined for secretion from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 4

A mutation disrupts the ability of a cell to add polysaccharide modifications to proteins. Which organelle is most likely defective?

Accepted Answer

Golgi apparatus

Question 5

Which of the following cell types would be most affected by a genetic defect in microtubule formation?

Accepted Answer

Sperm cells

Question 6

What is the main function of desmosomes in epithelial tissue?

Accepted Answer

Fasten cells together, anchored by intermediate filaments

Question 7

Which of the following best describes the cytoplasm of a eukaryotic cell?

Accepted Answer

The interior of the cell minus the nucleus, containing organelles suspended in cytosol

Question 8

A patient’s liver cells are found to have an abnormally low number of mitochondria. Which process would be most directly affected?

Accepted Answer

ATP production from cellular respiration

Question 9

Which of the following is NOT a component of the endomembrane system?

Accepted Answer

Mitochondria

Question 10

Which cell junction is responsible for preventing the passage of extracellular fluid between adjacent animal cells?

Accepted Answer

Tight junctions

Question 11

Which of the following statements about erythrocytes (red blood cells) in mammals is TRUE?

Accepted Answer

They lack DNA, RNA, and most organelles.

Question 12

A researcher adds radioactive dTTP to a culture of rapidly growing animal cells. Where in the cell would you expect to find the greatest concentration of radioactivity?

Accepted Answer

Nucleus

Question 13

Which organelle is responsible for the hydrolysis of macromolecules using hydrolytic enzymes?

Accepted Answer

Lysosome

Question 14

Which of the following best describes the function of the smooth endoplasmic reticulum (SER) in hepatocytes?

Accepted Answer

Drug detoxification and lipid synthesis

Question 15

Which formula correctly represents the magnification of a microscope?

Accepted Answer

$$	ext{Magnification} = \frac{	ext{Image size}}{	ext{Actual size}}$$

Question 16

Which of the following is a unique feature of plant cells compared to animal cells?

Accepted Answer

Presence of a central vacuole

Question 17

Which cytoskeletal element is primarily responsible for cell motility, such as the movement of cilia and flagella?

Accepted Answer

Microtubules

Question 18

A cell is observed to have extensive rough ER and Golgi apparatus. What is the most likely function of this cell?

Accepted Answer

Protein secretion

Question 19

Which of the following best describes the role of the nuclear lamina?

Accepted Answer

Provides structural support to the nucleus

Question 20

Which cell junction is the plant cell equivalent of gap junctions in animal cells?

Accepted Answer

Plasmodesmata

Cell Structure and Function: Microscopy, Organelles, and Specialized Cells

Study Guide - Practice Questions

Study Guide - Flashcards