Glycocalyx:
I. serves to protect the bacterium from harmful phagocytes
II. allow the bacterium to attach itself to inert surfaces
III. prevent desiccation of bacteria
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Most bacteria contain plasmids that often encode for traits that are:
1. advantageous but not essential to their bacterial host
2. advantageous and essential to their bacterial host
3. not advantageous but essential to their bacterial host
4. neither advantageous nor essential to their bacterial host
The given diagram shows:
1. Staphylobacilli
2. Staphylococci
3. Streptobacilli
4. Streptococci
Consider the given two statements:
Statement-I | After the application of decolourizer in Gram staining, the Gram negative bacteria do not retain the stain. |
Statement-II | Gram-negative cells have a thinner peptidoglycan layer that allows the crystal violet to wash out on addition of ethanol. |
1. | Both I and II are correct and II explains I |
2. | Both I and are correct but II does not explain I |
3. | I is correct and II is incorrect |
4. | Both I and II are incorrect |
The largest structures passed through the nuclear pores are:
1. | rDNA | 2. | Lamin proteins |
3. | mRNA | 4. | Ribosome subunits |
Cytoskeleton elements involved in intracellular transport, the formation of the axoneme of cilia and flagella and the mitotic spindle, are:
1. Microfilaments
2. Intermediate filaments
3. Microtubules
4. FTS-Z
The type of chromosomes not seen in humans are:
1. Metacentric
2. Sub-metacentric
3. Acrocentric
4. Telocentric
If a species of bacteria has multiple strains but only some are pathogenic, it is likely that unlike the non-pathogenic strains, the pathogenic strains will have:
1. Plasmids
2. Lipopolysaccharide
3. Pili
4. Flagellum
Consider the given two statements:
I. Gas vacuoles, found in cyanobacteria, are membrane-bound, spindle-shaped vesicles that provides buoyancy to these cells.
II. Positive buoyancy is needed to keep the cells in the upper reaches of the water column, so that they can continue to perform photosynthesis.
1. Both I and II are correct and II explains I
2. Both I and are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect
A true fungal cell wall does not contain:
1. Chitin
2. Glucans
3. Proteins
4. Cellulose