Prepare for NEET Biology Cell: The Unit of Life with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert solutions to understand cell structure and function.
Which of the following is NOT a characteristic feature exclusively found in prokaryotic 70S ribosomes?
Presence of 16S rRNA in the small subunit
Sensitivity to antibiotics like streptomycin
Presence of 28S rRNA
Sedimentation coefficient of 70S
A prokaryotic cell lacking MreB protein is most likely to exhibit which shape?
Rod-shaped
Spiral
Spherical
Filamentous
Which structural component of a prokaryotic cell exhibits the highest resistance to lysozyme digestion?
Gram-positive cell wall
Gram-negative cell wall
Mycoplasma membrane
Bacterial capsule
Polyhydroxybutyrate (PHB) granules in prokaryotes serve primarily as a reserve of:
Nitrogen
Phosphorus
Carbon and energy
Sulfur
Which unique feature of prokaryotic DNA replication allows for rapid cell division?
Presence of introns
Single origin of replication
Linear chromosomes
Multiple replication forks
The presence of hopanoids in some prokaryotic plasma membranes primarily contributes to:
Protein synthesis
Nutrient transport
Membrane stability
Photosynthesis
Which of the following is NOT a characteristic of prokaryotic DNA?
Circular in shape
Located in the nucleoid region
Associated with histone proteins
Not enclosed within a nuclear membrane
The 70S ribosomes of prokaryotes are composed of which subunits?
60S and 40S
50S and 30S
40S and 20S
80S and 60S
Which structure is primarily responsible for the motility of many bacteria?
Pili
Flagella
Fimbriae
Capsule
In prokaryotes, respiratory enzymes are associated with the:
Ribosomes
Nucleoid
Plasma membrane
Cell wall
