Download App

The Fundamental Unit of Life — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceThe Fundamental Unit of Life1 Mark
MCQ
The nucleus has:
  • A
    One membrane with pores.
  • B
    Two membranes with pores.
  • C
    Two membranes with pores through which substances do not pass.
  • ✓
    Two membranes with pores through which macromolecules may pass.
✓

Answer

Correct option: D.
Two membranes with pores through which macromolecules may pass.
The nuclear membrane is made up of two membranes surrounded by a perinuclear space. Nuclear envelope has a large number or pores with a diameter of $200-800$ angstroms. Nuclear pores have diaphragms, septa annuli, microspores for movement of substances between nucleus and cytoplasm.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 M]" from The Fundamental Unit of Life→The Fundamental Unit of Life — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

A bus increases its speed from $36 \mathrm{~km} / \mathrm{h}$ to $72 \mathrm{~km} / \mathrm{h}$ in 10 seconds. Its acceleration is:
→
Symptomatic treatment needs which of the following procedures$?$
→
The sound propagates in a gaseous medium by:
→
The universal Law of Gravitation explained:
→
In a plant cell, structure, support, and protection of the cell are provided by the:
→
Which of the following are homogeneous in nature?
  1. Ice
  2. Wood
  3. Soil
  4. Air
→
Which of the following does not have a fixed melting point/ boiling point?
→
A few substances are arranged in the increasing order ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
→
Species diversity ___ the further from the mainland.
→
............... plays a crucial role in detoxifying many poisons and drugs in a cell.
→