Microbiology in Biotechnology MCQs

Match the compounds in Group I with the correct entries in Group II. Group I Group II P. Cyanide 1. K+ ionophore Q. Antimycin A 2. Electron transfer from cytochrome b to cytochrome c1 R. Valinomycin 3. F1 subunit of ATP synthase S. Aurovertin 4. Cytochrome oxidase 5. Adenine nucleotide translocase

Which combination of the following statements is correct for cyanobacteria? P. They can perform oxygenic photosynthesis. Q. Usually filamentous forms are involved in nitrogen fixation. R. Nitrogen fixation occurs in heterocyst. S. They cannot grow in a mineral medium exposed to light and air.

A culture of bacteria is infected with bacteriophage at a multiplicity of 0.3. The probability of a single cell infected with 3 phages is

The most plausible explanation for a sudden increase of the respiratory quotient (RQ) of a microbial culture is that

Match the following antibiotics in Group I with their mode of action in Group II. Group I Group II P. Chloramphenicol 1. Binds to DNA gyrase Q. Norfloxacin 2. Binds to RNA Polymerase R. Puromycin 3. Inhibits peptidyl transferase S. Rifampicin 4. Mimics aminoacyl-tRNA

The typical coenzyme present in the methanogens is

Match the antibiotics in Group I with the targets in Group II. Group I Group II P. Sulfonamide 1. Peptidoglycan synthesis Q. Quinolones 2. Peptide chain elongation R. Erythromycin 3. Folic acid biosynthesis S. Cephalosporin 4. Topoisomerase

A microorganism isolated from a salt-rich (salt concentration ∼2 M) lake was found to possess diglycerol tetraethers, with polyisoprenoid alcohol side chains, as the major lipid component of its cell membrane. The isolated organism is

Bacteria with two or more flagella at one or both ends are called