Question 1

Which of the following best describes the main function of the Golgi apparatus in a eukaryotic cell?

Accepted Answer

It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

Question 2

A cell is placed in a solution and begins to shrink. Which type of solution is the cell most likely in, and what is the direction of water movement?

Accepted Answer

Hypertonic; water moves out of the cell.

Question 3

Which of the following molecules can most easily diffuse across the plasma membrane by simple diffusion?

Accepted Answer

Oxygen ($$O_2)$$

Question 4

Which organelle is primarily responsible for the synthesis of proteins that are to be exported from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 5

A patient is given an intravenous solution that is isotonic to their blood plasma. What effect will this have on their red blood cells?

Accepted Answer

Cells will remain the same size.

Question 6

Which of the following best describes the process of receptor-mediated endocytosis?

Accepted Answer

The cell takes in specific molecules after they bind to receptors on the plasma membrane.

Question 7

The sodium-potassium pump is an example of which type of membrane transport?

Accepted Answer

Primary active transport

Question 8

Which cytoskeletal element is primarily responsible for resisting pulling forces and providing tensile strength to the cell?

Accepted Answer

Intermediate filaments

Question 9

During which phase of mitosis do the centromeres split and sister chromatids move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 10

Which of the following statements about mitochondria is TRUE?

Accepted Answer

They contain their own DNA and ribosomes.

Question 11

A mutation prevents the formation of nuclear pores in a cell. Which process would be most directly affected?

Accepted Answer

Transport of mRNA from the nucleus to the cytoplasm

Question 12

Which of the following best explains why cholesterol is an important component of the plasma membrane?

Accepted Answer

It stabilizes the membrane and reduces fluidity at high temperatures.

Question 13

Which process requires energy input in the form of ATP to move substances against their concentration gradient?

Accepted Answer

Active transport

Question 14

A cell is observed to have an abundance of peroxisomes. Which function is this cell most likely specialized for?

Accepted Answer

Detoxification of harmful substances

Question 15

Which of the following is a function of lysosomes?

Accepted Answer

Digestion of engulfed bacteria and cellular debris

Question 16

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

Accepted Answer

It is involved in ribosomal RNA synthesis and ribosome subunit assembly.

Question 17

Which of the following is TRUE regarding the difference between mitosis and meiosis?

Accepted Answer

Mitosis results in two identical cells, while meiosis results in four genetically unique cells.

Question 18

Which of the following best describes the function of microvilli on the surface of intestinal epithelial cells?

Accepted Answer

They increase the surface area for absorption.

Question 19

A scientist observes a cell with a large number of ribosomes attached to its endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Synthesis of proteins for export

Question 20

Which of the following best describes the process of secondary active transport?

Accepted Answer

It uses the energy stored in an ion gradient created by primary active transport.

The Cellular Level of Organization: Structure and Function of Cells

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