Bacteria

1. Mesophile- an organism that prefers moderate temperature. Acidophile- bacteria that can handle acidic levels of pH. Psychrophile- an organism that is cold loving. Halophile- a bacteria that can handle large salt concentration. Thermophile- an organism that has a warm- loving preferred temperature range to. Psychrotrophs- an organism that can grow well at refrigerator temperatures and can spoil foods. Not slowed by refrigeration. 2. An Aerotolerant Anaerobe- can grow in oxygen if present

positive bacteria, which means that there is a lot of peptidoglycan in its cell wall. Therefore, the antibiotics that target these types of bacteria will decrease the metabolism of the bacteria. When placed in an incubator overnight, the bacteria will grow colonies that are 1-2 millimeters in diameter (8). Over time, the bacteria might have been able to produce offspring that are resistant to some antibiotics, called mutations. These mutations make the antibiotic useless on the bacteria from then

which method would limit the likelihood of bacteria growth the most. Using three types of meat: beef, pork and chicken, each meat was thawed in the refrigerator, at room temperature, in water at room temperature, and using a microwave. After each method of thawing, the meat was tested for the presence of bacteria. The testing involved swiping the meat with a sterilized swab then wiping the swab onto an agar Petri dish, a gelatin substance used to grow bacteria. The agar Petri dishes were

In this experiment each individual used the same hand washing method to measure the effectiveness of clean hands with antiseptic vs. dirty hands with no antiseptic. Afterward, observing the reduction of the number and types of bacteria on his or her hands. The antiseptic used in this experiment was one pump of Germ X with no paper towels after applying. After an incubation period of one night the plates were looked at and test results/pictures were obtained. Growth was indicated by a + for growth

pathways as observed through chemotaxis. Our binary methodological studies on worm movement allowed us to further explore bacterial preference in both wild type and mutated C. elegans by exposing the worms to known worm pathogenic bacteria, Serratia marsescens, to control bacteria B. thuringiensis. The question being tested is whether a mutation in an odor-receptor gene, one of the few genes responsible for olfaction and distinction of received chemical signals, will

CULTURE BACTERIA INTRODUCTION Culturing bacteria on a media has been an important laboratory technique since Robert Koch discovered how to grow bacteria in a petri dish. Bacteria will cultivate successfully on the media if the right nutrients, temperature, humidity, pH and any other specific conditions were provided. The most basic and common medium of growth on the nutrient broth, which contains water, beef extract and peptone. Although most bacteria will grow in this medium, some bacteria are fastidious

Problem: An unknown bacteria in test tube #13 needs to be identified out of the list of bacteria provided as possible. Hypothesis: If different tests were carried out to identify the bacteria’s characteristics, then the bacteria could be identified, because a dichotomous key can be used to eliminate all other bacteria in the list Procedure: 1. Obtain an inoculating loop, Bunsen burner, test tube #13 and a test tube rack. 2. Gram Stain Test to determine the shape of the bacteria, it’s orientation of

this ‘miracle’ drug. If antibiotics are continually used as bacteria grows exponentially more resistant to them then eventually society will fall back into an era without the readily

has yet again taught me something and shattered my understanding of the world. She talks about a bacteria called Pseudomonas syringae, these bacteria have a rare ability, to freeze water molecules. It does this by rearranging water molecules to absorb heat. I’m not really sure why these bacteria need this ability, however, it explains why people are not supposed to eat frostbitten food. These bacteria to me seem like they’re the key to making a weather

important part of medicine. It is used to treat all kinds of bacteria, infections, diseases. Sadly, antibiotics have been coming to an end, they are being used more and more often everyday. They are being used so much that the bacteria they are being used to treat have been starting to become resistant to these antibiotics. Many infections that were once so easy to be treated have been gaining a stronger resistance. This is because of how the bacteria have a special enzyme that kills and eats up the antibiotics