Q: Which of the following equations correctly represents the total magnification ($$M) of a $$compound light microscope?

$$M = \text{objective lens magnification} \times \text{ocular lens magnification}$$

Question 1

Which of the following best describes the main advantage of using an electron microscope over a light microscope when studying cells?

Accepted Answer

Electron microscopes provide higher useful magnification and better resolution, allowing visualization of much smaller cellular structures.

Question 2

A scientist is comparing the structure of a plant cell and an animal cell. Which organelle would be found in the plant cell but not in the animal cell?

Accepted Answer

Chloroplast

Question 3

Which of the following statements about the endosymbiont theory is correct?

Accepted Answer

It proposes that mitochondria and chloroplasts originated as independent prokaryotic organisms that were engulfed by a host cell.

Question 4

Which of the following best explains why the endosymbiont theory is considered a theory and not a hypothesis?

Accepted Answer

It is a widely accepted explanation supported by a large body of evidence from multiple scientific fields.

Question 5

A cell is observed to have a nucleus, mitochondria, rough and smooth endoplasmic reticulum, and a cell wall. Which type of cell is this most likely to be?

Accepted Answer

Plant cell

Question 6

Which of the following is NOT a function of the Golgi apparatus?

Accepted Answer

Synthesis of ATP

Question 7

A mutation causes a cell to lack functional lysosomes. Which of the following would most likely result from this mutation?

Accepted Answer

The cell would accumulate undigested waste and damaged organelles.

Question 8

Which of the following best describes the main structural difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Question 9

A researcher is studying the endomembrane system. Which of the following organelles is NOT considered part of the endomembrane system?

Accepted Answer

Mitochondrion

Question 10

Which of the following equations correctly represents the total magnification ($$M) of a $$compound light microscope?

Accepted Answer

$$M = 	ext{objective lens magnification} 	imes 	ext{ocular lens magnification}$$

Question 11

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

Accepted Answer

They are the site of protein synthesis, translating mRNA into polypeptides.

Question 12

A cell is placed in a solution and begins to swell. Which cellular structure is primarily responsible for preventing the cell from bursting in plant cells?

Accepted Answer

Cell wall

Question 13

Which of the following is a function of the smooth endoplasmic reticulum (ER)?

Accepted Answer

Lipid synthesis and detoxification of drugs and poisons

Question 14

A patient is diagnosed with a genetic disorder that affects the structure of their extracellular matrix. Which of the following symptoms would most likely be observed?

Accepted Answer

Impaired cell-to-cell communication and weakened tissue integrity

Question 15

Which of the following best describes the function of the nucleolus?

Accepted Answer

It is the site of ribosomal RNA (rRNA) synthesis and ribosome assembly.

Question 16

A scientist observes a cell with a large central vacuole, chloroplasts, and a rigid cell wall. Which process is most likely to occur in this cell that would not occur in an animal cell?

Accepted Answer

Photosynthesis

Question 17

Which of the following best explains why mitochondria and chloroplasts have their own DNA and ribosomes?

Accepted Answer

They are remnants of ancient prokaryotes that were engulfed by ancestral eukaryotic cells.

Question 18

Which of the following is a key function of the cytoskeleton in eukaryotic cells?

Accepted Answer

It provides structural support, facilitates cell movement, and organizes organelles.

Question 19

A cell is observed to have extensive rough endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Secretion of large amounts of proteins

Question 20

Which of the following best describes the main function of the plasma membrane?

Accepted Answer

It regulates the movement of substances into and out of the cell.

General biology unit 6

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