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:

A ‘slime layer’ or a ‘capsule’ is a modification of which of the following layers of the cell envelope of a prokaryotic cell?

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:

The surface appendage on the bacterial cells that helps in conjugation is:

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

Which of the following is absent in almost all plant cells?