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Questions and Answers
What is the primary component of a Ribosome?
Which structure is composed of phospholipids and proteins?
What is the main component of the Cell Wall in bacteria?
In a bacterium, what structure contains all the necessary genes?
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What is the composition of a Slime Layer in bacteria?
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What is the primary function of Pilus in a bacterial cell?
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Which structure in a bacterium serves as a hard protective covering around the cell wall?
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What is the composition of the Cytoplasm in bacteria?
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Which of the following is a small loop of DNA found in bacterial cells?
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The genome of a bacterium contains all necessary genes, but what is unique about Plasmid DNA compared to the genome?
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Study Notes
Bacterial Cell Structure
- Ribosomes are composed of RNA and protein and appear as small dots in the cell.
- Flagella are long, tail-like projections.
- Pili are small, sticky projections.
Cell Envelope
- The cell membrane is composed of phospholipids and proteins.
- The cell wall is made of peptidoglycan (a protein-sugar found in eubacteria).
Cellular Components
- Cytoplasm is mostly composed of water and is hypertonic (very salty).
- The slime layer is slimy and made up of carbohydrates, lipids, and proteins.
- The capsule is a hard, protective structure that surrounds the cell wall.
Genetic Material
- The genome is a large loop of DNA that contains all necessary genes for the bacterium.
- Plasmids are small loops of DNA.
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Description
Test your knowledge on the structures found in cells such as ribosomes, flagella, pilus, cell membrane, cell wall, cytoplasm, slime layer, capsule, and genome DNA.
