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Q.1. Clostridium and Streptococcus are both catalase-negative. Streptococcus grows by fermentation. Why is Clostridium killed by oxygen, whereas Streptococcus is not?
2. Assume that after washing your hands, you leave ten bacteria cells on new bar of soap. You then make a decision to do plate count of the soap after it was left in the soap dish for 24 hours. You dilute 1g of the soap 1:106 and plate it on standard plate count agar. After 24 hours of incubation, there are 168 colonies. How numerous bacteria were on the soap? How did they get there?3. Why is each of the bacteria often resistant to disinfectants?
1. Mycobacterium
2. Pseudomonas
3. Bacillus
4. Describe why gram-negative bacteria are more resistant to biocides than gram-positive bacteria. Be exact and descriptive in the response. A description of the differences between gram-negative and gram-positive bacteria must be included, along with an explanation of why any of those differences would have anything to do with the actions of biocides.
If repressor tetramer uses only two of its subunits to bind to an operator sequence, why is tetramer formation so important to the control of lac operon gene expression.
Based on what you already know about photosynthesis, develop the testable hypothesis to elucidate the influence of an increase in light intensity on the photosynthetic rate in tomato leaves.
As Ben jumped on his bike and headed for the fresh water lake, his mom called after him, "Don't swim if we have an electrical storm-it looks threatening". That was a valid request. Why with reason.
Explain the general pattern of alternation of generation in plants. Explore why the gametophyte has been reduced to a part (or parasite) of the sporophyte as plants have evolved. Present and defend your finding. Please list sources used. Write in Tim..
Describe how these two processes are related between plants and animal based on rectants and products (water, carbon dioxide, glucose and oxigen) of both pathways.
When a tropical moth is touched on the thorax it lifts its forewings up abruptly, exposing its brightly coloured hind-wings. What causes the moth to behave this way? What significance can we attach to the fact that the verbal ability scores of ado..
The time-of-entry mapping method was used to determine the first five markers transferred from each Hfr during a synchronized conjugation experiment. The markers and their transfer order form each Hfr are shown below.
It had been the warm, wet spring and she complained of a large number of flies in the area. She felt sick last day there after eating some canned food, as there was no cooler there. You had no time for culturing, as you require taking action fast.
What is the most likely defect associated with the Ser63 deletion mutant. How would you design an experiment to test your hypothesis using culture cells and the expression construct of wild-type and Ser63 deletion mutant of P0.
Why is the frequency of the sickle-cell gene different in North America versus Africa. Now what is your definition of male and female? This is a 26-year-old female with congenital adrenal hyperplasia. What do you say.
Also glucose technically doesn't have a carbonyl functional group then because it is broken when the ring structure is formed? Is it a random chance that either alpha or beta glucose is formed.
A series of enzymes catalyze the reaction X Y Z A. Product A binds to the enzyme that converts X to Y at the position remote from its active site. This binding decreases the activity of the enzyme.
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