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
A novel unicellular eukaryote is discovered with an unusual Golgi apparatus. Instead of the typical cis-trans polarity, its Golgi cisternae appear randomly distributed throughout the cytoplasm. Which cellular process would be MOST severely impacted by this disorganized Golgi?
Ribosome biogenesis
Transcription of mRNA
Targeted protein delivery to lysosomes and the plasma membrane
ATP synthesis via oxidative phosphorylation
Which of the following is NOT a function associated with the smooth endoplasmic reticulum (SER)?
Lipid synthesis
Detoxification of drugs and poisons
Calcium ion storage
Glycosylation of proteins
A mutation affects a eukaryotic cell's ability to add mannose-6-phosphate tags to proteins. Which organelle's function would be MOST directly compromised?
Nucleus
Peroxisome
Lysosome
Mitochondrion
Certain eukaryotic cells possess extensive networks of both smooth and rough ER. Which of the following cell types would likely have the HIGHEST combined surface area of ER?
Red blood cells
Skin epithelial cells
Steroid-producing cells
Muscle cells
