The Mannitol Salt Agar is used mainly to

A. isolate and differentiate between the different streptococcus bacteria
B. isolate and differentiate between the different enterococcus bacteria
C. isolate and differentiate between the different staphylococcus bacteria
D. isolate and differentiate between the different enterobacteriacae bacteria
E. none of the above


Answer: C. isolate and differentiate between the different staphylococcus bacteria

Biology & Microbiology

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The presence of branched membrane lipids with ether linkages is a characteristic of ____

a. Archaea only b. Bacteria only c. both Archaea and Bacteria d. of neither Archaea nor Bacteria e. Archaea, Bacteria and Eukarya

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The ________, first proposed by Francis Crick, summarizes the relationships between DNA, RNA, and protein

Fill in the blank(s) with correct word

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Why is the phospholipid bilayer considered semipermeable?

A. The hydrophobic tails act as a barrier to nonpolar molecules. B. The bilayer is a barrier to some, but not all, substances on either side of it. C. Large molecules can only pass through the layer of hydrophilic phospholipids. D. The bilayer is completely nonpolar, which prevents some molecules from passing. E. Small, nonpolar molecules do not pass through the phospholipid bilayer.

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Identify the conversion which represents nitrification.

A - Nitrite to nitrate to nitrogen to ammonia B - Nitrate to nitrite to ammonia to nitrogen C - Nitrogen to ammonia to nitrite to nitrate D - Ammonia to nitrate to nitrite to nitrogen

Biology & Microbiology