The majority of the organelles were able to receive the nutrient in the 1 cm cell and almost all of them in the 0.5 cm cell. This is caused due to the larger surface area to volume ratio as the cell size depends on the efficiency of the material to flow in and out through diffusion. Through diffusion‚ the organelles in the cell receive all the vitally needed nutrients to survive. If there is a big surface area to volume ratio such as 1:2‚ then this process will
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The purpose of the unknown bacteria lab assignment was to select an unknown bacteria culture and‚ through a series of metabolic tests‚ identify which bacteria genus resided in the pure culture received. A nutrient broth inoculated with bacterial culture (numbered 45‚ henceforth referenced as U45) was selected and a streak plate was made to isolate a pure culture for use throughout the assignment. From the streak plate‚ several slides were made to determine the morphology of unknown 45. A Gram stain
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several agar plates. It containing dilutions of the culture and antimicrobial agent.
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The components of milk also determine the possible bacteria that can grow‚ which includes water‚ fat‚ proteins‚ lactose‚ total solids‚ and minerals (Friedman 2017). The flavor and nutrients stem primarily from the milk fat‚ proteins‚ and lactose. When left to sit at room temperature‚ a cream will form on the surface of whole milk‚ and a smaller and lower cream will form in skim milk. The cream is partially comprised of solid fats‚ and
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Review all chapters in your exercise manual beginning with the introduction INTRODUCTION: (Covered 9.4.14 II Week 1) Biosafety levels1: basic level of containment. Hand washing or wearing gloves 2: Appropriate for working with human body fluids. Autoclave‚ sharps containers‚ lab coats 3: appropriate for working with pathogens that can be transmitted via respiratory route. Self-closing‚ double doors and sealed windows 4: Highest level. Aerosol pathogens; pathogens with no vaccine/treatment. Separate
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microscope to identify its unknown characteristic. There were other methods utilized in lab as well: the Mannitol Salt and Eosin Methylene Blue Agar and the tryptic soy broth experiments. Oxygen reaction (aerobic vs. anaerobic)‚ glucose fermentation‚ oxidase reaction‚ the catalase test‚ urea hydrolysis‚ nitrate reduction experimentation‚ Kligler’s Iron Agar‚ the SIM medium test and lastly the IMViC series of tests. All the biochemical tests were carried out in properly supervised manner to compare
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Abstract In an environment isolation procedure‚ experiments under categories‚ such as‚ morphology‚ physiology‚ antibacterial susceptibility‚ selective media‚ and biochemical provide results. Both the unknown isolate and members of the Micrococcus genus were shown to be obligate aerobes. By using staining methods‚ this proved that the organism is gram positive. Morphology‚ such as‚ orange pigmentation and coccus shape provide similarities to the Micrococcus genus. Physiological tests were shown to
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Background: In Jane Horack’s article “Staphylococcus epidermidis”‚ S. epidermidis is described as “gram-positive cocci bacteria that are part of the normal flora on the skin and nasal passages.” The article goes on to say that the species was originally named Staphylococcus Albus by microbiologist Rosenback in 1884. When viewed under a microscope S. epidermidis will appear in chains‚ pairs‚ or grape-like clusters (Horak 1). Taxonomically‚ the species S. epidermidis falls in the genus Staphylococcus
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white and the survival of the bacteria. Control: Nutrient agar plate with streaks of Serratia Marcescens without exposure to UV light. Results: Figure 1: Represents the nutrient agar plate used as the control that was not exposed to the UV light. Each quadrant represents a 10 sec exposure to the bacteria increasing to 40 secs. Serratia Marcescens bacteria streaked Figure 2: Represents the nutrient agar plate used as the second control with the bacteria
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Obtain agar plates from your instructor and label them as in the figure 1 provided below. 2. Using a sterile pipet‚ remove 130µL mixed bacterial suspension from the tube “C “‚ remove the lid from the control plate and dispense the bacteria unto the agar. Use a cell spreader to spread the bacteria evenly onto the agar surface. Use of the cell spreader; Dip the cell spreader into ethanol. Pass the spreader
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