Question 1

Which of the following statements best summarizes the first tenet of cell theory?

Accepted Answer

A cell is the basic structural and functional unit of life.

Question 2

A scientist observes a new organism under a microscope and notes that it is composed of multiple cells. Which part of cell theory does this observation support?

Accepted Answer

All organisms are made from one or more cells.

Question 3

Which of the following is NOT considered an extracellular material?

Accepted Answer

Plasma membrane

Question 4

A patient is diagnosed with a disorder affecting the selectively permeable barrier of their cells. Which cellular structure is most likely affected?

Accepted Answer

Plasma membrane

Question 5

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

Accepted Answer

It is the intracellular fluid containing organelles.

Question 6

A researcher is studying the process by which new cells are formed. According to cell theory, which statement is correct?

Accepted Answer

New cells arise only from pre-existing cells.

Question 7

Which of the following is an example of a cellular secretion?

Accepted Answer

Digestive fluid

Question 8

A mutation causes a cell to lose its ability to control cellular activity. Which structure is most likely defective?

Accepted Answer

Nucleus

Question 9

Which of the following best describes the extracellular matrix?

Accepted Answer

A network of proteins and polysaccharides providing support outside the cell

Question 10

A medical student is asked to identify the main parts of a typical cell. Which combination is correct?

Accepted Answer

Plasma membrane, cytoplasm, nucleus

Question 11

Which of the following scenarios best illustrates the principle that 'cells arise only from pre-existing cells'?

Accepted Answer

A wound healing as new skin cells divide to replace damaged ones

Question 12

Which of the following is a function of the plasma membrane?

Accepted Answer

It provides a selectively permeable barrier for the cell.

Question 13

A laboratory experiment involves isolating the fluid that surrounds cells in tissue. Which term best describes this fluid?

Accepted Answer

Extracellular fluid

Question 14

Which of the following best explains why the cell is considered the basic unit of life?

Accepted Answer

It is the smallest structure capable of performing all life processes.

Question 15

A patient with a genetic disorder has abnormal proteins in their extracellular matrix. Which of the following is most likely affected?

Accepted Answer

Support and structure provided to cells

Cell Theory and Cellular Structure: An Overview

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