Chapter 7, Problem 5A

Summary Introduction

Introduction :

The Cell Theory is one of the basic principles of biology, proposed by the scientists Theodor Schwann, Matthias Schleiden and later extended by Rudolph Virchow. The cell theory states that: the cell is the basic unit of life. All the living organisms are made up of cells. So cells are the basic unit of life. All the cells come from pre-existing cells.

Answer to Problem 5A

Correct answer :

The correct answer is option (D) Cells contain membrane bound organelles.

Explanation of Solution

Explanation/justification for the correct answer :

Option (D) Cells contain membrane bound organelles. Membrane bound organelles are not present in all the cells. Therefore, this statement is not a part of the cell theory. Thus, the correct answer is an option (D).

The explanation for the incorrect answer :

Option (A) basic unit of lie is the cell. This statement is a part of the cell theory.Thus, this is an incorrect option. Option (B) Cells come from pre-existing cells. This statement was proposed by Rudolph Virchow which is a part of the cell theory.Thus, this is an incorrect option. Option (C). All the living organisms are made up of cells. This statement was proposed by Rudolph Virchow which is a part of the cell theory.Thus, this is an incorrect option.