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
Robert Hooke
Christian de Duve
Robert Brown
Robert Koch
2. Which of the following is the central commanding centre of the cell?
Nucleus
Ribosome
Cytoplasm
Golgi complex
3. Which of the following is the control centre of the eukaryotic cell?
Nucleus
Mitochondria
Endoplasmic reticulum
Ribosomes
4. Which of the microorganisms below has two nuclei?
Yeast
Cyanobacteria
Amoeba
Paramecium
5. Which of the following is not a nucleus component?
Chromosome
Nucleolus
Cytoplasm
Nuclear envelope
6. What is the name of the signal that allows proteins to enter or exit the nucleus?
Notch signal
Paracrine signal
Nuclear localization signal
Chemical signals
7. Which of the following statements about chromatin is false?
Organized structure of DNA and protein
These are highly condensed DNA
It is found in the nucleus
It contains a single dsDNA
8. What chromatin region is transcriptionally silent?
Nucleoid
Centromere
Euchromatin
Heterochromatin
9. Nucleus are absent in
Red Blood Cells and Bacterium
Red Blood Cells, Sieve Cells and Bacterium
Red Blood Cells Only
None of These
10. Nucleus has
DNA only
DNA and protein only
DNA, RNA and proteins
None of these
11. The nuclear membrane is in constant contact with
Smooth Endoplasmic reticulum
Rough Endoplasmic reticulum
Golgi apparatus
Lysosomes
12. The most important function of the nuclear envelope is to protect the nucleus.
Nucleolus
Nuclear Matrix
Nuclear Lamina
Nuclear Proteins
13. The number of nuclear pores depends on the
Size of the Cell
Transcriptional Activity of the Cell
DNA Content of the Cell
All of These
14. The most important function of nuclear envelope is to
Regulate nucleo cytoplasmic traffic
Protect genetic material
Prevent the entrance of active ribosomes into the nucleus
Synthesis rRNAs
15. In chromatin, the DNA protein ratio is
3:1
2:1
1:1
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
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