You are allowed to use your notes, your textbook, and any other resources you ha

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 volutans

Explanation / Answer

1

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 :-

2

No membrane bound organelles

3

4

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

5

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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