Cytoskeleton, Cilia and Flagella, Centrosome and Centrioles, Nucleus, Microbodies — NEET Biology Questions

Practice 31 questions on Cytoskeleton, Cilia and Flagella, Centrosome and Centrioles, Nucleus, Microbodies from Cell: The Unit of Life (NCERT Class 11, Chapter 8). Free samples below — get all 31 in the app.

31 Questions Cell: The Unit of Life Class 11

Sample Questions — Cytoskeleton, Cilia and Flagella, Centrosome and Centrioles, Nucleus, Microbodies

Try 5 questions below from Cytoskeleton, Cilia and Flagella, Centrosome and Centrioles, Nucleus, Microbodies. Get all 31 in the MedicNEET app.

MCQ
Why are nucleosomes important for DNA packaging?
  • A. They unwind the DNA for transcription
  • B. They store genetic material within themselves
  • C. They form the fundamental unit of DNA packaging
  • D. They help in DNA replication and packing
✅ Correct Answer: C
DNA wraps around histone octamers forming nucleosomes, which compact long DNA strands. They do not help in replication.
MCQ
Which component of chromatin is transcriptionally active?
  • A. Heterochromatin
  • B. Euchromatin
  • C. Histone
  • D. Nucleosome
✅ Correct Answer: B
Euchromatin is loosely packed and transcriptionally active, while heterochromatin is tightly packed and inactive.
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MCQ
Which two types of protein filaments constitute the cytoskeleton in eukaryotic cells?
  • A. Actin and tubulin
  • B. Myosin and collagen
  • C. Elastin and tubulin
  • D. Myosin and elastin
✅ Correct Answer: A
Actin filaments and microtubules (made of tubulin) form the cytoskeletal framework in eukaryotic cells.
MCQ
Cilia and flagella are structurally similar but differ primarily in:
  • A. Diameter
  • B. Internal microtubule arrangement
  • C. Length and beating pattern
  • D. Presence of basal body
✅ Correct Answer: C
Both have a 9+2 arrangement but differ in length and how they move — cilia are shorter and beat in coordinated waves, flagella are longer with undulating movement.
MCQ
What is the name of the fibrous network found inside the nucleus?
  • A. Endomembrane system
  • B. Nucleoplasm
  • C. Chromatin
  • D. Nuclear matrix
✅ Correct Answer: D
The nucleus contains a dense nucleoplasm and a fibrous network known as the nuclear matrix.

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