Multiple choice

Match the column – I (Microorganism) with column – II (Physiological group) and select the correct option.

 
Column – I Column – II
P. Gallionella 1. Nitrifying bacteria
Q. Alcaligenes 2. Hydrogen bacteria
R. Rhodospirillum 3. Carboxydobacteria
S. Nitrobacter 4. Iron bacteria

  1. P - 1, Q - 2, R - 3, S - 4

  2. P - 2, Q - 1, R - 4, S - 3

  3. P - 3, Q - 2, R - 1, S - 4

  4. P - 4, Q - 2, R - 3, S - 1

  5. P - 4, Q - 3, R - 2, S - 1
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gallionella oxidize Fe++ as a source of energy for lithoautotrophic growth. Alcaligenes are hydrogen bacteria, i.e., they oxidize H2 as an energy source. Rhodospirillum are carboxydobacteria, i.e., they oxidize CO to CO2 using an enzyme carbon monoxide dehydrogenase. Nitrobacter oxidizes NO2 to NO3.

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