Microbiology
Description: GATE | |
Number of Questions: 15 | |
Created by: Priya Bakshi | |
Tags: GATE Role of Microorganisms in Transformation of Organic Matter and in the Causation of Diseases. |
Which of the following are not features of prokaryotes?
- Cell membrane
- Mitochondria
- Golgi complex
- Ribosome
- Cytoplasm
- Lysosomes
Which of the following statements are true about bacterial cell?
- The bacterial cell wall is composed of chitin.
- The cytoplasm of a bacterium is supported by microtubules.
- A gram-positive bacterium is stained purple by the gram stain.
- Bacterial flagella propel the cell by using a rotating motion.
Which of the following protozoans have flagella as locomotary organ?
- Entamoeba histolytica
- G. lamblia
- T. cruzi
- L. donovani
- B. coli
Which of the following genera of Mollicutes exhibit pleomorphic morphology? A. Mycoplasma B. Ureaplasma C. Acholeplasma D. Anaeroplasma E. Spiroplasma
Which of the following groups of bacteria are called gliding bacteria?
Which of the following sets contain only fruiting myxobacteria?
Which of the following statements are incorrect about prokaryotic cell?
- Prokaryotic cells are smaller in size than eukaryotic cells.
- Site for oxidative phosphorylation is mitochondria.
- Ribosomal subunits are 60S and 40S.
- Golgi body is absent.
Which of the following genera of mollicutes exhibits respiratory metabolism?
Which of the following sets of protozoans contain only endoparasites?
Life cycle of which of the following pathogenic protozoans is/are digenetic?
- E. histolytica
- P. vivax
- T. cruzi
Which of the following statements are incorrect regarding Plasmodium vivax?
- Duration of exoerythrocytic cyle is 14-15 days.
- Duration of erythrocytic cyle is 48 hours.
- Incubation period is 20-24 days.
- Duration of sexual cycle is 10 days.
Match the columns:Column – I |Column – II| |A. E. coli|1. Amphitrichous| |B. H. pylori|2. Lophotrichous| |C. R. rubrum|3. Monotrichous| |D. V. cholerae|4. Peritrichous|
Match the column – I (Organism) with column – II (Class) ||| |---|---| |Column – I |Column – II| |A. Amoeba|1. Sporozoa| |B. Astasia|2. Mastigophora| |C. Vorticella|3. Sarcodina| |D. Leishmania|4. Ciliophora|
Which of the following statements about prokaryotic extracellular appendages are correct?
- Bacterial glycocalyx is located inside the cell wall.
- Bacterial capsule is a well organized bacterial glycocalyx.
- F pili involve in transfer DNA one bacterium to another.
- Fimbriae help bacteria to attach to the other structures.
Match the column – I (Protozoan) with column – II (pseudopodia) ||| |---|---| |Column – I |Column – II| |A. Amoeba|1. Lobopods| |B. Radiolaria|2. Filopods| |C. Polystomella|3. Reticulopods | |D. Actinophyrus|4. Axopods|