Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2026BiologyChapterActual

Which of the following statements regarding the nucleus and its components is incorrect?

Options

  1. AThe outer nuclear membrane usually remains continuous with the endoplasmic reticulum.
  2. BThe nucleolus is a spherical, membrane-bound structure present inside the nucleoplasm.
  3. CChromatin contains DNA, basic histone proteins, non-histone proteins, and also RNA.
  4. DMature erythrocytes of many mammals lack a nucleus.

Correct answer

B. The nucleolus is a spherical, membrane-bound structure present inside the nucleoplasm.

Step-by-step solution

The nucleolus is a spherical structure present in the nucleoplasm. Its content is continuous with the rest of the nucleoplasm as it is not a membrane-bound structure. It is a site for active ribosomal RNA synthesis. The outer nuclear membrane usually remains continuous with the endoplasmic reticulum and also bears ribosomes on it. Chromatin contains DNA and some basic proteins called histones, some non-histone proteins, and also RNA. Mature erythrocytes of many mammals and sieve tube cells of vascular plants lack a

Practice Chapter on Quantrex Academy →

More from Chapter

Consider the following three biomolecules: X: Uridine Y: Cytidylic acid Z: Guanine Choose the option that correctly categorizes X, Y, and Z. 2026The complete, catalytically active enzyme together with its bound non-protein constituent is known as: 2026During a laboratory experiment, a student accidentally boils a sample of salivary amylase before adding it to a starch solution. Which of the following best explains the most likel 2026During a biological survey, a researcher discovers a new organism. To classify it properly, she examines its external and internal structure, cellular organization, developmental p 2026Given below are the stages in the sexual reproduction of higher fungi. Arrange the following stages in the correct sequence. A. Fusion of parental nuclei (Karyogamy) B. Meiosis in 2026Read the given statements regarding the general characteristics of bryophytes and select the incorrect statement. 2026Arrange the following male reproductive structures of gymnosperms in descending order of their physical hierarchy (macroscopic to microscopic). A. Microsporangium B. Microspore C. 2026Which of the following sets of plants is correctly paired with the nature of its dominant plant body and the status of its vascular tissues? 2026 Full Chapter list All NEET PYQs