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Bacteria
Bacteria are a large domain of single-celled, prokaryote microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals.
2,228 Questions
What is the name of the bacteria that builds up on your teeth?
Harmful bacteria will cause cavities, sensitive teeth and smelly breath. The microrgansms that stick to your teeth will plaque, a sticky build up of white surface material. You can get this bacteria from eating suger, certain juices and glazes. To prevent this floss daily and brush your teeth. Many of the bacteria will eat away and cause damage only made better with fillings, which cost a large amount of money at most dental places.
You can't smell it or taste it, but several types of fruits and vegetables emit ethylene, a naturally occurring gas that hastens the ripening process. Ethylene is the reason why unripened avocados will ripen if you put an apple into a bag with the avocados.
Foods that release the highest amounts of ethylene include apples, apricots, cantaloupe, figs and honeydew. When these items are stored next to other fruits and vegetables that rapidly absorb ethylene, spoilage will occur. For minimal food waste, never keep cruciferous vegetables (broccoli or cauliflower), leafy greens, eggplant or squash next to high-ethylene emitting fruits in your refrigerator or on your countertop.
Although fruits and vegetables may look perfect when you bring them home from the store, they are living organisms still in the process of decomposition from the minute they are harvested in the fields. Keeping your refrigerator in proper working order is critical for food longevity. The ideal interior temperature of a refrigerator is below 40 degrees Fahrenheit, ideally at 37. When refrigerators are kept at this temperature, the cold air can slow down naturally occurring decomposition processes of food, such as mold and bacteria. If your refrigerator is too warm, it will encourage the proliferation of microbial growth that will not only cause food to prematurely decay, but may also cause food borne illnesses such as salmonella. And if interior temperatures are too cold, they may cause fruits and vegetables to freeze, which results in cracked surfaces that leave them vulnerable to bacterial contamination and rapid decay.
Air and oxygen are not only essential for plant growth, but because they are responsible for the cycle of life and death in all living forms, they can also be the cause of food spoilage in the refrigerator. Overexposure to oxygen will cause a loss of quality in meats and other fatty foods. It will also cause oxidation, which results in unpleasant odors and tastes. Both air and oxygen will also encourage enzymes that speed up the decomposition process when fruits and vegetables are left in the refrigerator longer than they should be. The enzymes act quickly, and can encourage bacteria populations on decaying food to double in quantity within just 20 minutes.
Fruits and vegetables that are far into the decaying process will spread their bacteria to newer produce stored in the same area. To avoid premature spoilage, always remove rotten food from the refrigerator as soon as possible. If a head of lettuce has a few leaves with brown edges, you don't need to toss the entire head of lettuce away. Rather, just remove the spoiled outer leaves and use the rest of the lettuce within a day or two.
Why are genes inserted into animals and plants as well as bacteria?
Genes are inserted into the plasmid of bacteria so when they multiply so does the inserted protein e.g. Insulin is produced using this method. However there is a limit to the types of protein bacteria are capable of making. Scientists have now found that genes cam be transferred to an organism at the early stage of its development, as the organism matures- this inserted trait may prove to be useful, for example- the glowing gene from a jelly fish can be inserted into plants to make them glow when under attack from pests; this notifies the farmer of when to spray pesticide.
Are most pathogenic bacteria gram-negative?
No, not all pathogenic bacteria are gram-negative. Pathogenic bacteria can be either gram-negative or gram-positive, depending on their cell wall structure. Some common gram-negative pathogenic bacteria include Escherichia coli, Pseudomonas aeruginosa, and Neisseria meningitidis, while some gram-positive pathogenic bacteria include Staphylococcus aureus, Streptococcus pneumoniae, and Enterococcus faecalis.
An example of a forest that contains populations of bacteria, fungi, deer, frogs, and salamanders would be a temperate deciduous forest. These organisms interact and form a complex ecosystem where they coexist and rely on each other for survival.
What is a 12 cm air tube containing mucous membranes and cilia to trap dust and pollen and bacteria?
That would be the trachea, which is the windpipe that carries air to and from the lungs. The mucous membranes and cilia lining the trachea help to filter out particles and microorganisms, preventing them from reaching the lungs and causing harm.
Is Moraxella an airborne pathogen?
Moraxella bovis is not airborne - it is spread through flies or by direct contact between animals.
Moraxella catarrhalis might be a commensal of the human respiratory tract (meaning it is naturally found there). It is believed that it should not cause disease unless there are other underlying factors (such as immunocompromise).
Airborne transmission, if it occured, would therefore not be expected to cause disease.
Is geintal warts a bacteria viral or parasite?
Genital warts are caused by certain strains of the human papillomavirus (HPV), which is a virus, not a bacteria or a parasite. HPV is typically spread through sexual contact.
Is an obligate halophile an organism that requires high osmotic pressure?
Yes, an obligate halophile is an organism that requires high osmotic pressure, typically in the form of high salt concentrations, to survive and thrive. These organisms have adapted to living in environments with high salt content and would not be able to survive in environments with lower osmotic pressure.
Dehydrating food removes moisture, which is essential for bacteria to grow. Without moisture, bacteria cannot thrive and spoil the food, allowing dehydrated food to have a longer shelf life. Additionally, packaging dehydrated food in airtight containers further prevents bacterial contamination.
When food is put in the refrigerator all bacteria grow fairly fast?
It's actually the opposite - refrigerating food slows down the growth of bacteria. Cold temperatures inhibit the growth of most bacteria, helping to keep food safe to eat for a longer period of time. Make sure to follow storage guidelines and use your food by its expiration date to minimize bacterial growth.
Hand sanitizer typically contains alcohol, such as ethyl alcohol or isopropyl alcohol, along with ingredients like water, glycerin, and fragrance. These ingredients work together to reduce the amount of bacteria on your hands by killing germs and microbes when rubbed onto the skin.
What is the smallest bacteria on earth?
The smallest bacteria on Earth are known as Mycoplasma genitalium, which have a diameter of about 200-300 nanometers. They are known for their lack of a cell wall, making them smaller than other typical bacteria.
Is chlamydia a staphylococcus species?
No, chlamydia is not a species of staphylococcus. Chlamydia is a genus of bacteria that causes various diseases in humans, while staphylococcus is a separate genus of bacteria that includes species such as Staphylococcus aureus.
Bacteria, by definition, is single-celled. Some bacteria, however, contains organelles and some doesn't. Bacteria without organelles is called prokaryotic, whereas bacteria with organelles is eukaryotic.
What is the rate of degree of damage caused by streptococcus mutans?
The rate of degree of damage caused by Streptococcus mutans can vary depending on factors such as individual oral hygiene, diet, and overall health. It is known to be a primary contributor to dental caries (cavities) due to its ability to produce acid that erodes tooth enamel. Regular dental check-ups and good oral hygiene practices are important in preventing and controlling the damage caused by this bacteria.
What kind of substances do bacteria consume to get energy?
Bacteria can consume a variety of organic and inorganic substances to get energy, including sugars, proteins, fats, and even some chemicals. They can also undergo processes like fermentation or respiration to extract the energy stored in these substances.
How can Scavengers and bacteria make it difficult for fossils to form?
Scavengers can quickly consume carcasses, preventing them from becoming fossilized. Bacteria can also break down organic material before it has a chance to become fossilized. Both scavengers and bacteria can disturb or destroy potential fossils by moving bones, scattering pieces, or degrading the remains.
What is the most common route of contamination for blood bourne pathogens and bacteria?
The most common route of contamination for bloodborne pathogens and bacteria is through direct contact with infected blood or bodily fluids, such as from needle stick injuries or contact with broken skin or mucous membranes. Other routes include contaminated medical equipment or surfaces, as well as through unsafe injection practices.
"Coli bacteria" is a common shorthand for Escherichia coli, which is a type of bacteria found in the intestines of animals and humans. While some strains of E. coli are harmless, others can cause foodborne illness and infections. It is an important indicator organism used in water quality testing and microbiology research.
Does wiping a doorknob with an antibacterial wipe really reduce the numbers of bacteria?
Yes, wiping a doorknob with an antibacterial wipe can help reduce the number of bacteria present on the surface. However, it may not completely eliminate all bacteria. Regular cleaning and disinfection can help lower the risk of germ transmission.
What process kills harmful bacteria without much effect of te food?
Pasteurization is a process that kills harmful bacteria in food by heating it to a specific temperature for a set amount of time. This process helps to destroy harmful pathogens while preserving the quality and taste of the food.
Why do photosynthetic sulfur bacteria use hydrogen sulfide?
Photosynthetic sulfur bacteria use hydrogen sulfide because it can serve as an electron donor in the process of photosynthesis. They can use the energy from oxidizing hydrogen sulfide to convert carbon dioxide into organic compounds, similar to how plants use sunlight. This process allows them to thrive in anaerobic environments where other energy sources may be limited.
