Multiple Choice QuestionsWhich one of the following statements about mycoplasma is wrong?
They are also called PPLO
They are pleomorphic
They are sensitive to pencillin
They are sensitive to pencillin
What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?
These are all unicellular protists
They have flagella
They produce spores
They produce spores
A.
These are all unicellular protists
Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists.
Trypanosoma gambiense is the single celled, parasitic zooflagellate causing trypanosomiasis or sleeping sickness.
Giardia or the 'Grand old man of the intestine' is a diplomonadid parasitic flagellate occurring in the intestine of man and other animals and causes giardiasis or diarrhoea (i.e., very loose and frequent stool containing large quantity of fat).
Noctiluca is a marine, colourless dinoflagellate. It is a voracious predator and has a long, motile tentacle, near the base of which, its single short flagellum emerges.
Monocystis is a microscopic, unicellular endoparasitic protoan found in the coelom and seminal vesicles of earthworm. As it is an endoparasite, it does not possess any special structure for locomotion.
Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?
A. Temperature of about 25°C
B. Temperature of about 5°C
C. Relative humidity of about 5%
D. Relative humidity of about 95%
E. A shady place
F. A brightly illuminated place
Choose the answer from the following options
A, C and E only
A, D and E only
B, D and E only
B, D and E only
Which of the following are found in extreme saline
conditions?
Archaebacteria
Eubacteria
Cyanobacteria
Cyanobacteria
Viroids differ from viruses in having :
DNA molecules with protein coat
DNA molecules without protein coat
RNA molecules with protein coat
RNA molecules with protein coat
Which of the following organisms are known as chief producers in the oceans?
Dinoflagellates
Diatoms
Euglenoids
Cyanobacteria
Ciliates differ from all other protozoans in
using flagella for locomotion
having a contractile vacuole for removing excess water
having two types of nuclei
using pseudopodia for capturing prey
Match the following with correct combination.
| Column I | Column II |
| A. Cuscuta | 1. Saprophyte |
| B. Eichhornia | 2. Pneumatophare |
| C. Monotropa | 3. Insectivorous plant |
| D. Rhizophora | 4. Parasite |
| E. Utricularia | 5. Root pocket |
A |
B | C | D | E |
| 3 | 1 | 5 | 4 | 2 |
| A | B | C | D | E |
| 2 | 3 | 1 | 5 | 4 |
| A | B | C | D | E |
| 4 | 3 | 1 | 5 | 2 |
| A | B | C | D | E |
| 4 | 5 | 1 | 2 | 3 |
Thermococcus, Methanococcus and Methanobacterium are groups of
Bacteria containing a cytoskeleton and all membrane-bound organelles
Archaebacteria with peptidoglycan in their cell wall
Archaebacteria that consists of protein homologous to eukaryotic core histones
Most advanced type of bacteria
Switch
