Microbiology in Biotechnology MCQs

In leguminous plants, both the rhizobium genes and the plant genes influence nodulation and nitrogen fixation. Which one of the following functions is not encoded by the host plant genes?

Which one of the following organisms is used for the determination of phenol coefficient of a disinfectant?

Match the cell structures in Group I with the organisms in Group II. Group I Group II P. Endospores 1. Methanobacterium Q. Bipolar flagella 2. Treponema R. Pseudomurine in cell wall 3. Spirillum S. Periplasmic flagella 4. Clostridium

Match the human diseases in Group I with the causative agents in Group II. List-I List-II P. Amoebiasis 1. Leishmania donovani Q. African sleeping sickness 2. Trypanosoma cruzi R. Kala azar 3. Entamoeba histolytica S. Chagas' disease 4. Trypanosoma gambiense

Which one of the following organisms is an indicator of fecal contamination?

Match the antibiotics in Group I with their modes of action in Group II. Group I Group II P. Chloramphenicol 1. Inhibits protein synthesis by acting on 30S ribosomal subunit Q. Rifampicin Interferes with DNA replication by inhibiting DNA gyrase R. Tetracycline 3. Inhibits protein synthesis by acting on 50S ribosomal subunit S. Quinolone Interferes with RNA polymerase activity 5. Inhibits P-lactamase activity

A list of pathogens (Group I) and a list of anti microbial agents (Group II) used to treat their infections are given below. Match the pathogens with the corresponding anti-microbial agents. Group I Group II P. Influenza A virus 1. Isoniazid Q. Fungus 2. Amantadine R. Plasmodium 3. Fluconazole S. Mycobacterium 4. Artemisinin 5. Iodoquinol

Which of the following are true with regard to anaerobic respiration in bacteria? P. The final electron acceptor is an inorganic substance other than molecular oxygen. Q. The number of ATP molecules produced per glucose molecule is more than that produced in aerobic respiration. R. The number of ATP molecules produced per glucose molecule is less than that produced in aerobic respiration. S. Only substrate level phosphorylation is used to generate ATP.

Which of the following are true about bacterial superoxide dismutase? P. Present in obligate aerobes. Q. Present in facultative anaerobes. R. Present in aerotolerant anaerobes. S. Absent in obligate aerobes.