Nucleus

Nucleus
Advance Level Question

1. Experiments with Acetabularia successfully proved that the nucleus determines the structural of a plant due to the fact that:-
a. The plants of Acetabularia are unicelled     b. The shape of crown is specific     c. The stalk of the plant is very long     d. The rhizoidal part of the plant is swollen

2. Which of the following chromosomes is of rare occurrence ?
a. Metacentric     b. Acrocentric     c. Sub-metacentric     d. Telocentric

3. Chromosome is composed of:-
a. DNA     b. RNA     c. Protein     d. DNA, RNA and proteins

4. The structure of the nuclear membrane facilitates:-

a. Synapsis of homologous chromosomes at meiosis     b.Nucleo-cytoplasmic exchange of materials     c. Anaphasic separation of daughter chromosomes     d. Organisation of spindle

5. SAT-chromosome means:-
a. Satellite chromosome     b. Nucleolus organiser     c. Sine Acid Thymonucleinico     d. None of these

6. Double tetrasomic means:-
a. 2n + 2 + 4     b. 2n + 2    c. 2n+ 1 + 2     d. 2n + 2 + 2

7. The diameter of the nucleosome is:-
a. 55 A0     b. 110 A0    c. 40 A0     d. 80 A0

8. Study of nuclear cytology is:-
a. Neurology     b. Karyology    c. Radiology     d. Rhinology

9. Below are given a few cell organelles :
(a). Nucleus
(b) Lysosomes
(c) Peroxisomes
(d) ER
(e) Mitochondria
(f) Centrioles
(g) Plastids
Select the correct choice of organelles not bounded by two lipoprotein membranes.
a. b,c,d,f     b. a, e,f     c. b,c,f     d. d, a, e, g

10. Choose the correct statement about Nucleolus is the site of:-
Option:-
I. r-RNA synthesis
II. RNP synthesis
III. t-RNA synthesis
IV. DNA and ribosome synthesis
V. assemblage of ribosomal units
Choose the correct option:-
a. II & IV     b.I & V     c.III, IV & V    d. I, II, III, IV & V

11. Choose the correct statement about the nuclear envelope is porous. These pores control the passages of :-
Option:-
I. mRNA
II. nucleoproteins
III. mRNA + Protein
IV. shuttling protein
V. tRNA
Choose the correct option:-
a. II & V     b. I, IV & V     c.I & IV     d. I, II, III, IV & V/span>

12. Choose the correct sattement about the part which does not take stain amongst the following is:-
Option:-
I. chromatin
II. centromere
III. chromatid
IV. chromomere.
V.kinetochore
Choose the correct option:-
a. I & IV     b. II & V     c. II & III     d. I, II, III, IV & V/span>

13. Smallest chromosomes (size 0.025 u) are found in Algae. Largest eukaryotic normal chromosome is 32 u in size and found in :-
a. Trillium     b. Ophioglossum     c. Radiolarians     d. Maize

14. During staining, chromatin part of nucleus shows darker and lighter staining areas. Such a difference in staining is called :-
a. Metachromasia     b. Heteropyknosis     c. Eupyknosis     d. Gram's staining

15. Choose the correct statement about the syncitium is found in
Option:-
I. Vaucheria
II. Plasmodium
III. Rhizopus
IV. Saprolegnia
V. Fruiting bodies of fungi
Choose the correct option:-
a. II & V     b. I & IV     c. III, IV & V     d. I, II, III, IV & V

16. Choose the correct statement about which protein of nucleoplasm activates DNA to replicate and transcribe:-
Option:-
I. Histone
II. Nonhistone
III. Phosphoproteins
IV. Nucleoproteins
V. Scaffold protein
Choose the correct option:-
a.I & II     b. II & V     c. IV & V     d. I, II, III, IV & V

17. Choose the incorrect statement about enucleated plant cell is
Option:-
I. Vessel
II. Sieve tube
III. Fibre
IV. Xylem
V. Sieve cells
Choose the correct option:-
a. II & V     b.I & II     c. IV & V     d. I, II, III, IV & V

18.Minimum number (2n = 4) of chromosomes in an angiosperm is found in:-
a. Haplopappus     b.Allium     c.Trillium     d. Ophioglossum

19. Choose the correct statement about the Interphase nucleus enclosed by :-
a. nonporous nuclear membrane     b. porous double nuclear membrane     c. nonporous double discontinuous nuclear membrane     d. a single porous unit membrane

20. Choose the incorrect statement about the chromosomes of higher plants have:-
Option:-
I. DNA
II. Histone
III. RNA
IV. RNP
V. Fibrillar protein
Choose the correct option:-
a. I & IV     b. IV & V     c. II, III & IV     d. I, II, III, IV & V

21. The characteristics which identify a set of chromosome of an individual or species are called :-
a. Diploid     b. Karyotype    c. Diploid karyotype     d. Genome

22. The chief role of chromosomes in an organisms is :-
a. To bring about carbohydrate metabolism     b. To regulate the process of photosynthesis     c. To synthesize sugar     d. To regulate the heredity traits of an organisms

23. The total hereditary material out side the chromosome is called:-

a. Plasmagene     b. Plasmon     c. Cytogenome     d. Muton, cistron and recon

24. Choose the correct statement about the heterochromatin is condensed in the following region of the chromosome:-
Option:-
I. Secondary constriction I
II. Kinetochore
III. Secondary constriction II
IV. Telomere
V. Centromere
Choose the correct option:-
a. I & III     b.II & IV    c. I, II & III     d. I, II, III, IV & V

25. Exceptionally large chromosomes are called :-
a. m-chromosome     b. S-chromosome     c. Megachromosome     d. L-chromosome

26. The hexasomic complement can be expressed as under:-
a. ABC ABC ABC ABC ABC ABC     b. ABC ABC ABC AA BB CC    c. ABC ABC AA AA     d. ABC ABC AA AA AA

27. Which three cellular structures are mostly directly concerned with continuation of species:-
a. Cell membrane, nucleus, mitochondria     b. Cytoplasm, cell membrane vacuoles    c. Nucleus, chromosomes, genes     d. Cytoplasm, cell wall, plastids

28. Which of the following chromosomes are entirely heterochromatic ?
a. X - chromosome in Drosophila     b. Y - chromosome in Drosophila     c. Autosomes in plants     d.Autosomes in human beings

29. Constitutive heterochromatin was originally called :-
a. C-DNA     b. Z-DNA     c. B-DNA     d. S-DNA

30. Facultative heterochromatin is concentrated in:-
a. X - chromosome of human males     b. X - chromosome of human females     c. Y - chromosome of human males     d. Beaded autosomes

31. Choose the correct statement about the movement of metabolites through nuclear pores is controlled by:-
Option:-
I. Signal sequences only
II. Nuclear pore complex
III. Signal receptors only
IV. Nuclear lamins
V. Shuttling protein
Choose the correct option:-
a. II & IV     b. I & III     c. I, III & V     d. I, II, III, IV & V

32. An annulate lamella develops due to blebbing from the:-
a. Inner unit membrane of nuclear envelope     b. Outer unit membrane of nuclear envelope     c. Both the membranes of nuclear envelope    d. Annulus of the nuclear pore

33. Choose the incorrect statement about nucleosomes giving beaded appearance to chromosomes. They help in packing of DNA in the chromosomes.
A nucleosome has:-
Option:-
I. About 2 turns of DNA
II. 8 histone molecules of 4 types (2 mols each of H2a, H2b,H3 and H4)
III. scaffold protein
IV. linker DNA
V. 166 nitrogen base pairs
Choose the correct option:-
a. I & III     b. II & IV     c. III & V     d. I, II & V

34. Choose the correct statement about the filaments forming a chromosome called ?

Option:-
I. Chromonema
II. Chromomeres
III. Centromere
IV. Chromatin.
V. Chromatid
Choose the correct option:-
a. I only     b.IV only     c. II, IV & V     d. I, II, III, IV & V

35. The two nucleosomes are joined by linker DNA to which is attached:-
a. H1     b. H2     c. H3     d. H4

36. Choose the correct statement about the following histone proteins is least conserved in course of evolution:-
Option:-
I. H4
II. H3
III. H2
IV. H1
V. H5
Choose the correct option:-
a. I & IV     b.II & V     c. I & V     d. I, II, III, IV & V

37. In nucleosome core is formed by:-
a. 2 turns of DNA     b. Histones H1     c. 2 molecules ecah of H2A, H2B, H3 and H4 histones     d. DNA and histones

38. When nucleosome becomes once again coiled, the string of nucleosome is called:-
a. solenoid     b. chromomere     c. chromatin     d. none of these

39. In Nucleosome H1 histone does not take part in its formation. It rimply helps in grouping of nucleosomes. The DNA between two nucleosomes is called linker DNA that has 60 base pairs. The nucleosome and linker DNA are collectively called:-
a. chromosome     b. chromomere     c. chromatosome     d. centromere

40. In a cell:-
a. Heterosomes are more than autosomes     b. Autosomes are more than heterosomes     c. The heterosomes are more in a sex cell and autosomes in body cell     d. None of these

41.Which is the correct statement ?
Option:-
I. Nucleosomal organisation provides a chromatin fibre about 10 nm in thickness and chromatin fibres further condensed to produce a solenoid of 30 nm diameter.
II. The solenoid structure further coils to produce a chromatin fibre of 200 nm and then a chromatid of 700 nm diameter.
III. All the folded loops of chromatin are held by Scaffold formed by non-histone proteins..
IV. Nucleosome is the octamer of histone protein with DNA coil.
V. Scaffold proteins help in maitaining structure.
Choose the correct option:-
a. I, III & V     b. II & V    c. IV & V     d. I, II, III, IV & V

42. Hammeriing used Acetabularia (a marine,acellular green alga of 10cm size) for his grafting experiment to prove that:-
a. genes are located on chromosomes     b. chromosomes are bearers of hereditary characters    c. characters are controlled by nucleus in the cell     d. one gene is associated with one enzyme

43. The types of NHP found in the chromosome:-
a. Three     b. Two     c. Four     d. Five

44. In the first level of organisation of chromatin(called nucleosome) DNA is folded (Packed 5-7 times) to shorten length. It is further folded to form solenoids. In this second level of chromatin organisation, DNA is packed:-
a. 11 times     b. 22 times     c. 40 times     d. 30 times.

45. 
Match the following:-

 

Column I

 

Column II

A

Nucleolus

1

Lipid storage

B

Sphaerosomes

2

Glycolate metabolism

C

Peroxisomes

3

Transport of macromolecules

D

Plasmodesmata

4

RNA synthesis

a.  A - 2, B - 1 , C - 3 , D - 4  
b.  A - 4, B - 3 , C - 1 , D - 2
c. A - 4, B - 1 , C - 2 , D - 3 
d. A - 4, B - 1 , C - 3 , D - 2

46. The correct match is:
a. Peripheral nucleus—Prokaryotic cell     b. Binucleate cell—Nucleus    c. Nucleonema—Nucleolus     d. Chromonema—Phycoerythrin

47. Fibrous lamina is a thick layer of 300 A0. It is seen in nucleus:-
a. Inner to inner membrane     b. Outside outer nuclear membrane     c. In chromatin network     d. In nucleolus.

48. Chromatin is composed of:-
a. DNA + histone     b. DNA + RNA + histone     c. DNA + small amounts of RNA     d. DNA + RNA + histone and nonhistone proteins

49. Nucleoli are typically large in cells:-
a. undergoing mitosis     b. with high energy requirements     c. with high levels of protein synthesis     d.with low levels of protein synthesis.

50.Nucleo cytoplasmic traffic through the nuclear pores is facilitated by:-

a. Nucleoplasm     b. Nuclear lamina     c. Lipid layers     d. Nucleoproteins

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