You are allowed to use your notes, your textbook, and any other resources you ha
ID: 88341 • Letter: Y
Question
You are allowed to use your notes, your textbook, and any other resources you have at your disposal You should work on your own as much as possible, because the quiz will be very to material on the lecture exams and final, but you will be on your own (and without access to your notes) while taking them. 1. Prokaryotes entail two of the three domains (major groupings of life. What are the names of those two domains? (2 points) 2. What traits are common among all prokaryotes? (Circle the correct answer, or answers, among the following, 2 points) Cell Wall Highly acidic environments Peptidoglycan No Membrane-bound organelles Positive Gram staining 3. There are three shapes that represent the most common shapes of prokaryotes. What shape would you assign to the following bacterial species based on their names points): Shape? Species Lactobacillus acidophilus Staphylococcus aureus Spirillum volutansExplanation / Answer
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The two domain systems are Archea and Bacteria
The three domain system of classification of organism was given by Carl Wose in 1977.
He classified organisms into three domains :-
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No membrane bound organelles
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when Gram +ve bacteria are treated with dye i.e, crystal violet/methylviolet or gentian violet they stain blue with this dye and when treated with iodine solution(KI) and alcohol they retain the original blue or purple colour imparted by dye because:-
Gram -ve
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Flagella .............F . Cell motility
Capsule ............ B .Dessication protection
Sex pilus ........... H .allows transfer of genetic material
Proton pump .......A Establishes electrochemical gradient
Channel protein ...D facilitate the passive transfer of solutes
Fimbrae ...............G cell Adherence
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