Cell Theory and The Cell Membrane

Centuries of research and discoveries have led scientists to develop what is known as " (a)   ," which is summarized in the following widely accepted principles: 1. Cells are the units of (b)   and function in all organisms. 2. New cells arise from (c)   cells. 3. Cells require and use (d)   . 4. Cells contain DNA which is passed on to daughter cells; it is the genetic information. 5. Some organisms are (e)   i.e. they are made up of one cell, while others are multicellular and consist of many cells of different types that have a hierarchical organisational structure.

• cell theory
• structure
• pre-existing
• energy
• unicellular

Which year marks the first observation of living cells by Anton van Leeuwenhoek?

• 1665

• 1675

• 1838

• 1859

Which of the following statements is true about organisms according to the cell theory?

• All organisms are multicellular.

• Some organisms are unicellular.

• All organisms are non-cellular.

• Some organisms are non-living.

Which of the following is NOT a principle of the cell theory?

• Cells contain DNA.

• Cells arise from pre-existing cells.

• Cells do not use energy.

• Cells are the units of structure and function.

What is the primary function of the cell membrane?

• To produce energy

• To separate the cell's interior from the outside environment

• To store genetic information

• To synthesize proteins

Some scientists consider viruses to be living. State two reasons why viruses do not conform to the cell theory.

What type of molecules are electrolytes that are transported into the cell?

• Proteins

• Ions

• Lipids

• Carbohydrates

Which of the following is a waste product transported out of the cell?

• Fructose

• Water

• Ethanol

• Vitamins

Which of the following is a role of the cell membrane?

• Controlling the entry and exit of materials

• Producing glucose

• Replicating DNA

• Synthesizing lipids

What is the model called that helps scientists visualize and understand cell membrane structure?

• Solid mosaic model

• Rigid mosaic model

• Fluid mosaic model

• Static mosaic model