Gram-positive bacteria

two unknown organisms within a mixed culture. Each student was given a mixed culture containing one Gram negative organism and one Gram positive organism. I received unknown mixed culture #15. The possible Gram negative organisms within the mixed culture include: Enterobacter aerogenes, Pseudomonas aeruginosa, Neisseria perflava, Proteus vulgaris, and Moraxella catarrhalis. The possible Gram positive organisms within the mixed culture include: Corynebacterium xerosis, Enterococcus faecalis, Staphylococcus

Cross-pollination took place on day 29 and followed a very specific procedure. Our group observed flowering in cells three (two flowers) and five (four flowers). Pollen was carefully transferred from the stamen of each plant to the pistil of another using a small brush. This was repeated several times to ensure success. Finally, buds without flowers were trimmed from each plant. On day 36, seed pods were counted and a total of 12 were recorded and photographed. Buds and flowers were clipped from

Does radiation affect the growth of seeds? If seeds are exposed to radiation then it will affect plant growth. The procedures of this experiment were; get three seeds, all the same kind. Then don't expose one to microwave radiation, Expose the second one to fifteen seconds of radiation, then expose the third one to thirty seconds of radiation. Put the one without any radiation in pot number one, then put the seed with fifteen seconds of radiation in pot number two, then put the seed with thirty

Identify and describe three groups of low G+C Gram-positive bacteria. Clostridia: rod-shaped, obligate anaerobes, some form endospores, produce potent toxins that cause a variety of diseases in humans. Important in medicine & industry (Botox & oral plaque). Examples of clostridia include C. tetani (cause tetanus), C. perfringens ( causes gangrene), C. botulinum ( causes botulism) and C. difficle (severe diarrhea). Microbes related to Clostridium include: Epulopiscium - a giant bacterium that can

heat fixed bacterial slides unknown bacteria was colorless. The primary stains reagent, Crystal Violet was added to the slide the unknown bacteria color was purple. Then, Iodine mordant the color of cells still remained purple. After adding the decolorizer alcohol gram + would remain purple and the purple color from the gram- would be removed and it would become colorless. The last counterstain safranin was added to the slide a gram+ would remain purple and the gram – would turn pink or reddish in color

Bacteria Classification By Gram Staining THE AMERICAN UNIVERSITY IN CAIRO BIOLOGY DEPARTMENT SCIENCE 453 : BIOLOGY FOR ENGINEERS REPORT No.1 Presented By : Karim A. Zaklama 92-1509 Sci. 453-01 24/2/96 Objective: To test a sample of laboratory prepared bacteria and categorise it according to Christian's gram positive and gram negative classes and also by viewing it under a high powered microscope and oil immersions; classify its shape and note any special characteristics. Introduction: Bacteria

Mac Conkey Agar is selective and differential culture medium for bacteria, which is designed to selectively isolate gram-negative and gram-positive bacteria and also differentiate groups of gram-negative bacteria based on lactose fermentation. The crystal violet and bile salts in Mac Conkey agar is used to inhibit the growth of gram-positive organisms which allows for the selection and isolation of gram-negative bacteria. However, for differential medium Mac Conkey agar will contain lactose, a fermentable

1-The Gram Stain Eric Zuberi Lab section 1 February 8, 2015 This report represents my individual effort. I did not receive or offer aid to anyone when performing this assignment, nor did I plagiarize any material. Signed: _____________________________________________ Eric Zuberi   I. Introduction In all areas of biology, it is easy to see that structure is related to function. This statement holds true in microbiology as well, the study of microorganisms, including bacteria. One characterizing

Identifying Two Unknown Species of Bacteria Materials and Methods Week 1, Day 1 (10 November 2000) The first day an unknown sample was assigned to each group of students. The first test applied was a gram stain to test for gram positive or gram-negative bacteria. The morphology of the two types of bacteria was viewed under the microscope and recorded. Then the sample was put on agar plates using the quadrant streak method for isolation. There were three agar plates; one was incubated

everywhere and measured in micrometers, because they are so microscopic. Bacteria are prokaryotic, which means they have no membrane-base organelles and lack a nucleus. Prokaryotic bacteria reproduce by binary fission. Bacteria can be harmful and helpful to the human body. Harmful bacteria are treated with an arrangement of antibiotics. However, not all bacteria are pathogenic, some are helpful to the human body. Natural bacteria that are helpful to the human body are located in the human intestines