Gram Staining and Bacterial Cell Walls

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What is the unique characteristic of Archaeabacteria's cell membrane?

They have unusual lipids in their cell membrane.

What is the function of peptidoglycans in bacterial cell walls?

Peptidoglycans are present in the cell walls of Eubacteria, but absent in Archaeabacteria.

What is the shape of the bacteria Streptococci?

Cocci that occur in chains.

What is the characteristic of the bacteria that live in anaerobic conditions, converting H2 and CO2 into methane?

They are Methanogens. Signup and view all the answers

What is the purpose of salt in the metabolism of Halophiles?

They use salt to generate ATP. Signup and view all the answers

What is the characteristic of the bacteria that live in extremely acidic areas with high temperatures?

They are Thermoacidophiles. Signup and view all the answers

What is the main function of the peptidoglycan in the cell wall of Gram positive bacteria?

To provide shape and protection to the cell Signup and view all the answers

What is the difference between the cell wall of Gram positive and Gram negative bacteria?

Gram positive bacteria have a thicker layer of peptidoglycan, while Gram negative bacteria have an outer membrane made of lipids and sugars Signup and view all the answers

What is the function of the cell membrane in bacterial cells?

To regulate the movement of materials in and out of the cell and to contain enzymes important for cellular respiration Signup and view all the answers

What is the function of thylakoids in photosynthetic bacteria?

To carry out photosynthesis Signup and view all the answers

What is the purpose of capsules in bacterial cells?

To protect the cell against drying, harsh chemicals, and host antibodies, and to assist in attaching to surfaces Signup and view all the answers

What is the function of pili in bacterial cells?

To assist in attaching to hosts and to transfer genetic material from one bacterium to another Signup and view all the answers

What is the purpose of endospores in bacterial cells?

To protect the cell against harsh environments, such as heat and drought, and to allow the cell to survive in unfavorable conditions Signup and view all the answers

What is the main difference between the cytoplasm of bacterial cells and that of eukaryotic cells?

Bacterial cells do not have membrane-bound organelles, whereas eukaryotic cells do Signup and view all the answers

What is the function of the outer membrane in Gram negative bacteria?

To protect the cell against some antibiotics Signup and view all the answers

What is the function of flagella in bacterial cells?

To provide movement Signup and view all the answers