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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
Does pili helps bacterial cells move?
Yes, pili are hair-like appendages found on the surface of some bacteria that help with functions like adherence to surfaces, DNA transfer, and movement. They can also aid in the twitching or gliding motility of bacterial cells by extending and retracting, propelling the cell in the surrounding environment.
Do bacteria form endospores to survive unfavorable conditions in their surrounddings?
Yes, bacteria form endospores as a mechanism to survive harsh environmental conditions such as extreme temperatures, lack of nutrients, or exposure to toxins. Endospores are dormant structures that protect the bacterial DNA and other essential components, allowing the bacteria to remain viable until better conditions arise for growth and reproduction.
Pleomorphism, metachromatic granules, and palisade arrangement. Pleomorphism refers to the fact that C. diptheriae is rod-shaped but can appear club-shaped, needle-shaped, or spermlike. Metachromatic granules are reddish-purple granules that are visible when stained with metylene blue. Palisade arrangement refers to the presentation of rods in a parallel fashion that looks like a picket fence.
What percent of bacteria are considered dangerous pathogens?
100% of micro organisms are micro, therfore all of them may penetrate through the layers of the mini scram jet engine, therfore, are dangerous, as a build up of these micro organisms can result in the spontanoues inflammation of the cervix in a woman.
However, the micro organism may evaporate into a super micro organism. In this case, all of humanity is doomed, as all planes will explode, therefore no wanking on planes, as it is definitely illegal. Howsoever, the miracle of anti biotics means that the micro organisms will be imploded spontaneously to avoid internal combustion of the penis area.
Thanks for asking,
This is T. Watt.
What problems would bacteria face without humans?
Without humans, bacteria would face challenges in finding suitable environments for growth and reproduction. They may struggle to access resources for survival and may also face competition from other organisms for space and nutrients. Additionally, without human activities such as transportation and agriculture, certain bacteria species may have limited opportunities for dispersal and evolution.
How are bacteria similar to fungi similar to animal?
Bacteria, fungi, and animals are all living organisms that require nutrients to survive. Bacteria and fungi are both capable of decomposing organic matter, while animals obtain nutrients by consuming other organisms. Additionally, they all play a role in various ecosystems and can impact the environment in different ways.
What has been used in bacteria to produce proteins and drugs that help fight disease?
Bacteria have been engineered to produce proteins and drugs using recombinant DNA technology. This involves inserting genes encoding the desired protein or drug into the bacteria's genome, which then enables them to produce these compounds efficiently on a large scale for therapeutic use in fighting diseases.
Is Cyanobacteria good or bad if good or bad what does it do that is good or bad?
Answer 1
yes because it could cause a very bad disease.
Answer 2
There are thousands if not millions of varieties of cyanobacteria. Most are entirely neutral to humans. There a positive benefits that accrue from some species of cyanobacteria such as nitrogen-fixing in the soil and certain medicines that are derived from cyanobacteria. Some Cyanobacteria also have negative impacts, such as releasing poisonous toxins and causing red tide in saltwater bodies.
Why should you grow bacteria in a pure culture instead of a natural environment?
Growing bacteria in a pure culture allows for the specific species to be identified and studied without interference from other microorganisms. This method ensures reproducibility of results and allows for better understanding of the characteristics of the particular bacteria being studied. Additionally, pure cultures are essential for activities such as genetic manipulation and drug development.
Hershey and Chase discovered that after the P-labeled phages infected the bacteria, most of the radioactive phosphorus was found in the viral DNA, while little to no radioactive sulfur (used to label protein) was found. This confirmed that genetic material, not protein, is responsible for heredity in viruses.
What is bacteria passing resistance to a medicine on to offspring an example of?
Bacteria passing resistance to a medicine on to offspring is an example of vertical gene transfer, where genetic material is transferred from parent to offspring. This mechanism allows for the inheritance of beneficial traits, helping bacteria survive in the presence of antibiotics.
Which of these algae are used to prepare a medium for bacterial culture?
Agar, a type of red algae, is commonly used to prepare solid culture media for bacterial growth. It solidifies at room temperature, providing a stable surface for bacterial colonies to develop.
Why do bacterial colonies reach a ceartain size and then stop growing?
Bacterial colonies reach a certain size and stop growing because they exhaust the available nutrients in their environment or produce waste products that inhibit further growth. This leads to a plateau in growth as the bacterial population self-regulates to maintain a balance between available resources and population size.
Haloquadra walsbyi is a halophile which is an example of an extremophile. Halophiles are organisms that thrive in environments with high concentrates of salt eg, the Dead Sea.
What is most common gram positive or gram negative bacteria?
Gram-negative bacteria are more commonly found in nature compared to gram-positive bacteria. This is because gram-negative bacteria have a more complex cell wall structure that allows them to survive in a wider range of environments. However, the exact prevalence of each type of bacteria can vary depending on the specific ecosystem or context being studied.
What is a obligate halophile bacteria mean?
An obligate halophile bacteria is a type of microorganism that requires high concentrations of salt to grow and survive. These bacteria are typically found in environments with high salt content such as salt lakes and saline soils. They are unable to grow in low-salt or freshwater conditions.
What is the function of lipoteichoic acid in gram positive bacteria?
Lipoteichoic acid in gram positive bacteria plays a role in cell wall structure and stability. It helps regulate the movement of ions in and out of the cell, and also serves as a ligand for host cell receptors, which can influence the host-pathogen interaction.
What population of bacteria that doubles its size every 20 minutes exhibits growth?
um if you use the simple doubling time formula, you'd do it like this: (final pop. #) = (original pop. #) x 2^(time it takes for it to double/ how many times it doubles) so you're missing some info. find out either the initial pop or the final pop. your probably referring to one bacterium, but yeah, double check (haha, get it? double?haha)
Is Serratia marcescens an obligate aerobe or a facultative anaerobe?
Serratia marcescens is a facultative anaerobe, meaning it can grow in the presence or absence of oxygen. While it can use oxygen for respiration, it also has the ability to ferment carbohydrates in anaerobic conditions when oxygen is not available.
What basis have biologists determined that Archaea and Bacteria are not closely related?
Biologists have determined that Archaea and Bacteria are not closely related based on differences in their cellular structures (such as cell wall composition), genetic makeup (e.g., differences in DNA replication and gene expression), and metabolic pathways. Additionally, phylogenetic analysis of their ribosomal RNA sequences has shown distinct evolutionary paths, supporting their divergence into separate domains of life.
A zone of exhibition is a designated area within a space, such as a museum or gallery, where artworks, displays, or exhibits are presented to the public for viewing. It is typically organized thematically or by collections to enhance the visitor's experience and understanding of the content being showcased.
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.
