Q. No.Which of the following cell organelle is absent in prokaryotic cell?
1. Ribosome
2. Lysosome
3. Mitochondria
4. 2 and 3 both
Identify the accurate explanation of mesosome.
It is :
| 1. | a specialised structure of prokaryotic cell formed by extension of plasma membrane into the cytoplasm |
| 2. | the middle layer of the prokaryotic cell wall |
| 3. | the organelle of eukaryotic cell which helps in lipid synthesis |
| 4. | the middle layer of eukaryotic cell wall. |
Which of the following is not true about plasmid
| 1. | extra chromosomal DNA |
| 2. | give unique genotypic characters to bacteria |
| 3. | helps in antibiotic resistance |
| 4. | helps in reproduction |
| 1. | Ribosomes | 2. | Mesosomes |
| 3. | Golgi Apparatus | 4. | Centrosomes |
| 1. | Membrane bound vesicular structure |
| 2. | Chain of many ribosomes attached to a single mRNA |
| 3. | special structure formed by the extension of plasma membrane |
| 4. | medium sized chromosome |
Prokaryotic mesosomes do not help in:
1. Cell wall formation
2. DNA replication
3. Respiration
4. Photosynthesis
Chromatophores are:
1. present in liopolysaccharide layer of gram negative bacteria
2. colored pigments present in fluorescent bacteria
3. vesicles that store pigments in prokaryotic cells
4. extensions on membrane in cynobacteria
Select the wrong statement.
| 1. | Bacterial cell wall is made up of peptidoglycan |
| 2. | Pili and fimbriae are mainly involved in motility of bacterial cells |
| 3. | Cyanobacteria lack flagellated cells |
| 4. | Mycoplasma is a wall-less microorganism |
Which of the following is true about Inclusion bodies
1. membraneless
2. present freely in cytoplasm
3. store phosphate,glycogen
4. All of the above
Bacterial flagellum is composed of
| 1. | Basal body, axoneme and centrosome |
| 2. | Basal body, hook and filament |
| 3. | Axoneme, basal body and tubulin protein |
| 4. | Centriole, hook and axoneme |
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