Biology

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  • Created by: 090801AF
  • Created on: 12-10-16 17:10
What is cell theory?
Cell theory states that the cell is the basic unit of living organisms. Before the discovery of the cell, people were unaware that living organisms were made of building blocks like cells. Cell theory is one of the basic theories of biology.
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Are there living organisms without cells?
Viruses are considered the only living organisms that do not have cells. Viruses are made up of genetic material (DNA or RNA) enclosed in a protein capsule. They do not have membranes, cell organelles, or own metabolism.
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What are the two main groups into which cells are classified?
Cells can be classified as eukaryotic or prokaryotic. Prokaryotic cells are those that do not have an enclosed nucleus. Eukaryotic cells are those with a nucleus enclosed by a membrane.
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Do the cells of bacteria have a nucleus?
In bacteria, genetic material is contained in the cytosol and there is no internal membrane that encloses a nucleus.
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Are any bacteria made of more than one cell?
There are no pluricellular bacteria. All bacteria are unicellular and prokaryotic
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What is the difference between a plasma membrane and a cell wall?
A plasma membrane and a cell wall are not the same thing. The plasma membrane, also called the cell membrane, is the outer membrane common to all living cells, made of a phospholipid bilayer, embedded proteins and some bound carbohydrates. Because c
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Card 2

Front

Are there living organisms without cells?

Back

Viruses are considered the only living organisms that do not have cells. Viruses are made up of genetic material (DNA or RNA) enclosed in a protein capsule. They do not have membranes, cell organelles, or own metabolism.

Card 3

Front

What are the two main groups into which cells are classified?

Back

Preview of the front of card 3

Card 4

Front

Do the cells of bacteria have a nucleus?

Back

Preview of the front of card 4

Card 5

Front

Are any bacteria made of more than one cell?

Back

Preview of the front of card 5
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