STRAIGHTERLINE MICROBIOLOGY BIO250L LABS 1,2,3,4,5,6,7 & 8 LATEST 2022

1. Make a graph of the pH changes over the course of the experiment. How does the pH change at each step? Why? Yogurt shapes when microscopic organisms age the milk sugar, known as lactose, into lactic corrosive. The lactic corrosive makes the milk more acidic (lower pH) making the proteins coagu...

Data Sheet 1. Insert your dichotomous key here. 2. Write your microorganism number here: Microorganism #3 3. Fill in the following table as you complete the interactive

1. Which germicide was the most effective? Was the same germicide most effective for bacteria isolated from the different sources? What could explain this finding?Lab 7 Microbial Control BIO250L We did not find a difference in effectiveness. We could have had this happen because the bacteria did ...

1. Which germicide was the most effective? Was the same germicide most effective for bacteria isolated from the different sources? What could explain this finding? 10% bleach was most effective. Yes, it was most effective for bacteria isolated from the different sources. Since bleach is a solutio...

1. Which DNA nitrogenous bases pair with each other? Which bases are purines, and which are pyrimidines? Adenine and guanine are the purines and Cytosine and Thymine are the pyrimidines. 2. How is DNA information used to make proteins? What are the steps of this process? Enzymes read the informa...

1. Escherichia coli is one of the most common causes of foodborne illness, yet it is also a common microorganism found within the human gut. What explains this disparity? Harmful E. coli that are in polluted food and water are a straine of E.coli called Enterohemorrhagic strains. Harmless strains...

1. What is a model organism, and why is Saccharomyces cerevisiae so often used as one? In microbiology, molecular biology, and biochemistry labs, a model organism is utilized for analysis and research. Saccharomyces cerevisiae is frequently used as one because it is small (in sizo), has a fast gr...

1. Why was cow manure used as a potential source of starch degrading bacteria?” Because it contains amylase which is an enzyme that breaks down starch into smaller molecules. Cow manure is used because of the high starch content and amylase which is responsible for degrading starch. “2. What...

1. What substance in MSA confers selectivity? Why?” High sodium chloride. This makes it very selective because it kind of makes difficult for bacteria to grow. “2. What substance makes MSA differential? Why?” Mannitol because this makes it differential because of the staphylococcus aureus c...

1. What was the population density of the original sample? What would have happened if you had inoculated an agar plate with 1mL of the original sample?” If the agar plate had 1mL of the original sample, the population density would increase a lot. “2. Did all the bacterial colonies on the co...

1. What determines if a bacterial cell is Gram-positive or Gram-negative? The structure of a cell wall determines whether the cell is Gram-positive or Gramnegative The cell walls of Gram-positive bacteria are made up of thick layers of peptidoglycan. When Gram positive cells are treated to a Gram ...

1. Which plate grew the most bacterial species (based on number of different colonies)? Was this a surprise? Why or why not?” Table #3 grew the most bacterial species. The kids have been eating and putting their toys on the table the whole day so I wasn’t surprised that it had the most bacter...

View the images of cells below, paying attention to detail, and note the different characteristics of prokaryotes and eukaryotes. For each image, label the parts indicated in the table provided. Use the following list of terms to identify each cell structure (NOTE- some structures may be present i...

1. What constitutes personal protective equipment? When should personal protective equipment be worn? Why is personal protective equipment important? PPE protects your skin and other sensitive areas like your nose, eyes, and mouth. It is a barrier between you and protentailly harmful mircrorganis...