Question 1

Which of the following statements is NOT part of the modern cell theory?

Accepted Answer

Cells can spontaneously generate from non-living matter.

Question 2

Which of the following is considered the basic unit of organization in living organisms?

Accepted Answer

The cell

Question 3

A scientist discovers a new organism. Which feature would confirm that it is composed of cells?

Accepted Answer

It has a plasma membrane, cytosol, DNA, and ribosomes.

Question 4

Which of the following is NOT a universal component of all cells?

Accepted Answer

Nucleus

Question 5

If a cell lacked ribosomes, which cellular process would be directly affected?

Accepted Answer

Protein synthesis

Question 6

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

Accepted Answer

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

Question 7

A student claims that viruses are living because they contain DNA. Based on cell theory, why is this incorrect?

Accepted Answer

Viruses do not have a plasma membrane or ribosomes.

Question 8

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

Accepted Answer

A cut on your skin heals as new skin cells are produced.

Question 9

Which of the following is a direct consequence if a cell loses its plasma membrane?

Accepted Answer

The cell would lose its ability to regulate its internal environment.

Question 10

Which of the following best explains why DNA is considered a universal component of all cells?

Accepted Answer

DNA stores the genetic instructions necessary for cell function and reproduction.

Question 11

A researcher observes a structure that contains cytosol, DNA, and ribosomes but lacks a plasma membrane. According to cell theory, what can be concluded?

Accepted Answer

It is not a true cell.

Question 12

Which of the following is the best example of the cell theory principle that cells are the basic unit of life?

Accepted Answer

Muscle tissue is made up of many muscle cells working together.

Question 13

Which of the following would NOT be considered evidence supporting the cell theory?

Accepted Answer

Non-living crystals can grow in size.

Question 14

Which of the following is a multi-step process that demonstrates the cell theory in action?

Accepted Answer

A fertilized egg divides repeatedly to form a multicellular organism.

Question 15

Which of the following is a correct sequence of events according to cell theory?

Accepted Answer

A cell divides → new cells are formed → organism grows

The Cell Theory and Basic Components of Cells

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