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
What is the primary function of the nucleolus?
DNA replication
Protein synthesis
Ribosome biogenesis
Cellular respiration
Which of the following statements accurately describes the nucleolus?
It is the site of ribosomal RNA (rRNA) synthesis and ribosome biogenesis.
It is a membrane-bound organelle involved in protein synthesis.
It stores DNA and is responsible for DNA replication.
It is the primary site of cellular respiration.
Which component of the ribosome is synthesized within the nucleolus?
mRNA
tRNA
rRNA
Ribosomal proteins
Polyribosomes are aggregation of
Peroxisomes
Ribosomes and RNA
Several ribosomes held together by a string of RNA
RNA and RNA
Which of the following subunits of ribosome is composed of 23 S rRNA and a 5 S RNA + 32 different proteins?
30S
50S
40S
60S
Nucleolus is
Rounded structure found in cytoplasm near nucleus
Rounded structure inside nucleus and having rRNA
Rod-shaped structure in cytoplasm near the nucleus
None of the above
Nucleolus is
Rounded structure found in cytoplasm near nucleus
Rounded structure inside nucleus and having rRNA
Rod-shaped structure in cytoplasm near the nucleus
None of the above
Which of the following is true for nucleolus ?
It is a site for active ribosomal RNA synthesis.
Larger nucleoli are present in dividing cells.
It takes part in spindle formation.
It is a membrane-bound structure.
