NEET-UG Biology · Class 11
Nucleus, chromatin and chromosome types — NEET & JEE Questions
Nucleus, chromatin and chromosome types is a topic in Cell: The Unit of Life, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 12 published NEET-UG questions on Nucleus, chromatin and chromosome types, each with the marking scheme of the real paper.
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Nucleus, chromatin and chromosome types MCQs with solutions
10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Which nuclear structure is the main site of ribosomal RNA synthesis and ribosome-subunit assembly?
- A. Nucleolus
- B. Nuclear pore
- C. Centromere
- D. Chromatid
What is chromatin?
- A. DNA associated with proteins in the nucleus
- B. A membrane surrounding the nucleus
- C. A stack of ribosomes
- D. A component of the Golgi apparatus
How does a metacentric chromosome differ from an acrocentric chromosome?
- A. A metacentric chromosome has a centrally placed centromere, while an acrocentric chromosome has the centromere near one end
- B. A metacentric chromosome lacks a centromere
- C. An acrocentric chromosome always has equal arms
- D. A metacentric chromosome occurs only in prokaryotes
The nuclear envelope of a typical eukaryotic cell is
- A. a double membrane containing nuclear pores
- B. a single cellulose wall
- C. a protein coat with no membrane
- D. continuous with the plasma membrane only
A chromosome observed at metaphase has two sister chromatids joined at a constricted region. What is this constricted region?
- A. Centromere
- B. Nucleolus
- C. Nuclear pore
- D. Telomere
During interphase, genetic material is usually present mainly as
- A. less-condensed chromatin
- B. fully condensed metaphase chromosomes
- C. free nucleotides only
- D. ribosomal proteins only
A chromosome has its centromere approximately in the middle, producing two nearly equal arms. It is classified as
- A. metacentric
- B. acrocentric
- C. telocentric
- D. submetacentric only
A chromosome with its centromere near one end, producing one very short arm and one very long arm, is
- A. acrocentric
- B. metacentric
- C. telocentric
- D. isodicentric
Which nuclear structure is especially associated with rRNA synthesis and ribosome-subunit assembly?
- A. Nucleolus
- B. Centromere
- C. Lysosome
- D. Peroxisome
Why do chromosomes become highly condensed during mitosis?
- A. Condensation helps compact and segregate long DNA molecules accurately
- B. Condensation is required for DNA replication in S phase
- C. It removes histones permanently
- D. It converts DNA into RNA
Common mistakes in Nucleus, chromatin and chromosome types
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Classifying chromosomes by total size instead of by centromere position.
- Confuses a terminal centromere with the near-terminal position of an acrocentric chromosome.
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