MCQ on Nucleus:
1. Genome is______
(1) Part of chromosome
(2) Half chromosome
(3) Total DNA in cell
(4) A complete set of chromosomes
Answer: 4
2. Nucleolar organizer is a_____
(1) Primary constriction
(2) Secondary constriction
(3) Tertiary constriction
(4) Centriole
Answer: 2
3. Kinetochore is present in______
(1) Mitochondria
(2) Sphaerosome
(3) Chromosome
(4) Flagella
Answer: 3
4. A complete set of chromosomes inherited as an unit from one parent is known as_______
(1) Karyotype
(2) Gene pool
(3) Genotype
(4) Genome
Answer: 4
5. Chromosomes composed of________
(1) DNA, RNA, Histones, Non histones
(2) DNA and Histones
(3) DNA and RNA
(4) DNA, RNA and Histones
Answer: 1
6. Which part of chromosome is concern with ageing of organism and cancer.
(1) Centromere
(2) Telomere
(3) Kinetochore
(4) Satellite
Answer: 2
7. The non–sticky chromosomal ends are known as__________
(1) Chromatids
(2) Centromere
(3) Satellite
(4) Telomere
Answer: 4
8. Highest arm ratio occur in which chromosome_________
(1) Telocentric
(2) Metacentric
(3) Submetacentric
(4) Acrocentric
Answer: 4
9. Nucleus controls the activity of cytoplasm by sending_________
(1) Enzymes
(2) cAMP
(3) Hormones
(4) RNA
Answer: 4
10. The protein nucleoplasmin occurs in________
(1) Nuclear pore complex
(2) Sieve cells
(3) Nucleolus
(4) Hetero chromatin
Answer: 1
11. The telomeres of eukaryotic chromosomes consist of short sequences of –
(1) Cytosine rich repeats
(2) Adenine rich repeats
(3) Guanine rich repeats
(4) Thymine rich repeats
Answer: 3
12. Which of the following is true for nucleolus ?
(1) Larger nucleoli are present in dividing cells.
(2) It is a membrane-bound structure.
(3) It takes part in spindle formation.
(4) It is a site for active ribosomal RNA synthesis.
Answer: 4
13. If you are provided with root–tips of onion in your class and are asked to count the chromosomes which of the following stages can you mostconveniently look into :-
(1) Telophase
(2) Anaphase
(3) Prophase
(4) Metaphase
Answer: 4
14. In a human cell 2.2 metre long thread of DNA distributed in________
(1) one chromosome
(2) 23 chromosome
(3) X chromosome
(4) 46 chromosome
Answer: 4
15. Ribonucleic acid occurs in________
(1) Nucleus
(2) Cytoplasm
(3) Nucleus and cytoplasm
(4) Mitochondria and lysosome
Answer: 3
16. Nucleus is_________
(1) Single layered structure
(2) Three layered structure
(3) Four layered structure
(4) Two layered structure
Answer: 4
17. Telomerase is an enzyme which is a________
(1) RNA
(2) Ribonucleoprotein
(3) Repetitive DNA
(4) Simple protein
Answer: 2
18. Protein synthesis in an animal cell occurs________
(1) On ribosomes present in cytoplasm as well as in mitochondria
(2) On ribosomes present in the nucleolus as well as in cytoplasm
(3) Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
(4) Only on the ribosomes present in cytosol
Answer: 1
19. Which of the following is observed in the interphase nucleus ?
(a) Chromatid, (b) Chromatin, (c) Centriole,
(d) Nucleolus, (e) Centromere, (f) Kinetochore
(1) a, b, c
(2) Only b
(3) a, b, c, f
(4) b and d
Answer: 4
20. Part of chromosome after secondary constriction is called___________
(1) Chromomere
(2) Telomere
(3) Satellite
(4) Nucleolar organiser
Answer: 3
21. Chromatin is made up of________
(1) Nucleoprotein
(2) Nucleoside
(3) Pentose sugar
(4) Nitrogenous base
Answer: 1
22. If the centromere is sub–median the two arms are unequal then the chromosome is called as
(1) Metacentric
(2) Submetacentric
(3) Acrocentric
(4) Telocentric
Answer: 2
23. Nucleolus is formed by ________
(1) Mitochondria
(2) Nucleus and Ribosome
(3) Primary constriction
(4) Secondary constriction
Answer: 4
24. Hetero-chromatin is_________
(1) Darkly stained part of chromatin
(2) Lightly stained part of cristae
(3) Lightly stained part of grana
(4) Scattered Lobes in cytoplasm
Answer: 1
25. Which of the following are correct for the cell which has naked ds circular DNA?
(a) Both 70S and 80S ribosomes
(b) Histone absent
(c) Compartmentalisation of cytoplasm absent
(d) Always diploid
(1) a and d
(2) b and c
(3) a and c
(4) b and d
Answer: 2
26. Chromosome with centromere at one end__________
(1) Metacentric
(2) Submetacentric
(3) Telocentric
(4) Acrocentric
Answer: 3
27. One genome is which type of set of chromosomes?
(1) Haploid
(2) Diploid
(3) Triploid
(4) Polyploid
Answer: 1
28. Part of chromosome which joins with spindle fibres is________
(1) Chromatid
(2) Chromonema
(3) Chromomere
(4) Centromere
Answer: 4
29. The cells without nuclei are present in________
(1) Vascular cambium
(2) Root hair
(3) Companion cell
(4) Members of seive tube
Answer: 4
30. DNA is not present in________
(1) Ribosomes
(2) Nucleus
(3) Mitochondria
(4) Chloroplast
Answer: 1
40. Nuclear envelope is a derivative of__________
(1) Membrane of Golgi complex
(2) Microtubules
(3) Rough endoplasmic reticulum
(4) Smooth endoplasmic reticulum
Answer: 3