- What are the main features of bacteria?
- What are the harmful effects of bacteria?
- What is a bacterial cell?
- What are 4 types of bacteria?
- What are 2 examples of bacteria?
- What is the most common type of bacteria?
- Why are bacteria bad?
- What are some harmful bacteria?
- What is the function of DNA in a bacterial cell?
- What are the parts of a bacteria?
- What does a bacteria cell look like?
What are the main features of bacteria?
Bacteria are like eukaryotic cells in that they have cytoplasm, ribosomes, and a plasma membrane.
Features that distinguish a bacterial cell from a eukaryotic cell include the circular DNA of the nucleoid, the lack of membrane-bound organelles, the cell wall of peptidoglycan, and flagella..
What are the harmful effects of bacteria?
Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.
What is a bacterial cell?
Bacteria are all single-celled. The cells are all prokaryotic . This means they do not have a nucleus or any other structures which are surrounded by membranes . Bacteria also have small, closed-circles of DNA called plasmids present in their cytoplasm. …
What are 4 types of bacteria?
Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). They can exist as single cells, in pairs, chains or clusters.
What are 2 examples of bacteria?
Bacteria are the plural of bacterium, which are microscopic one-celled organisms. They are found everywhere and can be harmful, as in infections; or they can be beneficial, as in fermentation or decomposition. Five types of bacteria are: Coccus, Bacillus, Spirillum, Rickettsia, and Mycoplasma.
What is the most common type of bacteria?
While it is true that you will not find a surface without bacteria on it, the majority of bacteria that you’ll find are common, non-dangerous species. Studies have shown that of the bacteria found in indoor air, the most common four are: Micrococcus, Staphylococcus, Bacillus, and Pseudomonas.
Why are bacteria bad?
Many disease-causing bacteria produce toxins — powerful chemicals that damage cells and make you ill. Other bacteria can directly invade and damage tissues. Some infections caused by bacteria include: Strep throat.
What are some harmful bacteria?
The bacteria and viruses that cause the most illnesses, hospitalizations, or deaths in the United States are described below and include:Campylobacter.Clostridium perfringens.E. coli.Listeria.Norovirus.Salmonella.
What is the function of DNA in a bacterial cell?
Like other organisms, bacteria use double-stranded DNA as their genetic material. However, bacteria organise their DNA differently to more complex organisms. Bacteria have a single circular chromosome that is located in the cytoplasm in a structure called the nucleoid.
What are the parts of a bacteria?
The enzyme lysozyme, found in human tears, also digests the cell wall of bacteria and is the body’s main defense against eye infections.The gram-positive cell wall.The gram-negative cell wall.Fimbriae and pili.S-layers.Glycocalyx.Flagella.The bacterial DNA and plasmids.Ribosomes and other multiprotein complexes.More items…
What does a bacteria cell look like?
Bacteria are like eukaryotic cells in that they have cytoplasm, ribosomes, and a plasma membrane. Features that distinguish a bacterial cell from a eukaryotic cell include the circular DNA of the nucleoid, the lack of membrane-bound organelles, the cell wall of peptidoglycan, and flagella.