A non-membrane bound organelle found in animal cells that helps in cell division would be:
1. | Centromere | 2. | Centrosome |
3. | Basal body | 4. | Fimbriae |
A ‘comma’ shaped bacterium is known as a:
1. Bacillus
2. Coccus
3. Vibrios
4. Spirillum
The genomic DNA of a bacterial cell is:
1. circular and located on a single chromosome
2. circular and located on multiple chromosomes
3. linear and located on a single chromosome
4. linear and located on multiple chromosomes
Extra-chromosomal circular double stranded and autonomously replicating DNA found in many bacteria is known as:
1. | Plastid | 2. | Genophore |
3. | Plasmid | 4. | Genome |
A ‘slime layer’ or a ‘capsule’ is a modification of which of the following layers of the cell envelope of a prokaryotic cell?
1. | Glycocalyx | 2. | Cell wall |
3. | Lipoprotein layer | 4. | Cell membrane |
Mesosomes, extensions of plasma membrane in bacterial cells, help in all the following except:
1. Cell wall formation
2. DNA replication and distribution to daughter cells
3. Respiration
4. Photosynthesis
A basal body is a part of bacterial:
1. | Inclusion bodies | 2. | Chromosomal DNA |
3. | Flagellum | 4. | Plasmid |
The surface appendage on the bacterial cells that helps in conjugation is:
1. | Flagellum | 2. | Fimbria |
3. | Pilus | 4. | Cilia |
Identify the incorrect statement regarding bacterial ribosomes:
1. They are associated with plasma membrane
2. They are 70 S with two subunits being 30 S and 40 S
3. Several ribosomes may attach to a single mRNA
4. They translate the mRNA into proteins
Reserve materials in prokaryotic cells are stored in the cytoplasm in the form of:
1. Non-membrane bound lysosomes
2. Gas vacuoles
3. Chromatophores
4. Inclusion bodies