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Multiple Choice Questions on Nucleus

Multiple choice questions on nucleus can help students evaluate their knowledge of concepts in nucleus. Nucleus MCQ answers are also given to help you remember. Try our Multiple choice questions on nucleus to see if you can get all the answers right for the nucleus MCQ questions below.

Multiple Choice Questions on Nucleus

A nucleus is a membrane-bound organelle that contains the cell’s chromosomes. Pores in the nuclear membrane allow for the passage of molecules in and out of the nucleus.

1. Nuclei were first discovered by

  1. Robert Hooke
  2. Christian de Duve
  3. Robert Brown
  4. Robert Koch

2. Which of the following is the central commanding centre of the cell?

  1. Nucleus
  2. Ribosome
  3. Cytoplasm
  4. Golgi complex

3. Which of the following is the control centre of the eukaryotic cell?

  1. Nucleus
  2. Mitochondria
  3. Endoplasmic reticulum
  4. Ribosomes

4. Which of the microorganisms below has two nuclei?

  1. Yeast
  2. Cyanobacteria
  3. Amoeba
  4. Paramecium

5. Which of the following is not a nucleus component?

  1. Chromosome
  2. Nucleolus
  3. Cytoplasm
  4. Nuclear envelope

6. What is the name of the signal that allows proteins to enter or exit the nucleus?

  1. Notch signal
  2. Paracrine signal
  3. Nuclear localization signal
  4. Chemical signals

7. Which of the following statements about chromatin is false?

  1. Organized structure of DNA and protein
  2. These are highly condensed DNA
  3. It is found in the nucleus
  4. It contains a single dsDNA

8. What chromatin region is transcriptionally silent?

  1. Nucleoid
  2. Centromere
  3. Euchromatin
  4. Heterochromatin

9. Nucleus are absent in

  1. Red Blood Cells and Bacterium
  2. Red Blood Cells, Sieve Cells and Bacterium
  3. Red Blood Cells Only
  4. None of These

10. Nucleus has

  1. DNA only
  2. DNA and protein only
  3. DNA, RNA and proteins
  4. None of these

11. The nuclear membrane is in constant contact with

  1. Smooth Endoplasmic reticulum
  2. Rough Endoplasmic reticulum
  3. Golgi apparatus
  4. Lysosomes

12. The most important function of the nuclear envelope is to protect the nucleus.

  1. Nucleolus                                 
  2. Nuclear Matrix
  3. Nuclear Lamina
  4. Nuclear Proteins

13. The number of nuclear pores depends on the

  1. Size of the Cell
  2. Transcriptional Activity of the Cell
  3. DNA Content of the Cell
  4. All of These

14. The most important function of nuclear envelope is to

  1. Regulate nucleo cytoplasmic traffic
  2. Protect genetic material
  3. Prevent the entrance of active ribosomes into the nucleus
  4. Synthesis rRNAs

15. In chromatin, the DNA protein ratio is

  1. 3:1
  2. 2:1
  3. 1:1
  4. 4:1

Answers

1. Robert Brown

2. Nucleus

3. Nucleus

4. Paramecium

5. Cytoplasm

6. Nuclear localization signal

7. Organized structure of DNA and protein

8. Heterochromatin

9. None of These

10. DNA, RNA and proteins

11. Rough Endoplasmic reticulum

12. Nuclear Lamina

13. Transcriptional Activity of the Cell

14. Prevent the entrance of active ribosome into the nucleus

15. 1:1

We hope nucleus MCQ post helps you understand structure, function, components, and concepts are clear for now after reading nucleus MCQ.

Further Readings

  1. Multiple choice questions on Cytoplasm
  2. Molecular Biology MCQs Online
  3. Basic Molecular Biology Multiple choice Questions
  4. Basic Molecular Biology MCQs With Answers
  5. MCQ on Molecular biology – Nucleic acid (DNA)

Reference

  1. https://byjus.com/biology/cell-biology-mcqs/
  2. https://www.bbc.co.uk/bitesize/guides/ztxx97h/revision/1