Ribosome

Ribosome
Advance Level Question

1. Choose the correct statement about smallest, membraneless submicroscopic organelleas :-
Option:-
I. Ribosome
II. Palade particles
III. RNP
IV. Engine of the cell
V. Protein factory
Choose the correct option:-
a. I & V       b. II & IV        c. I , II & V      d. I, II, III, IV & V

2. Which statement is correct about negatively charged:-
Option:-
I. Ribosome
II. Golgi body
III. ER
IV. r-RNA
V. t-RNA
Choose the correct option:-
a. I & V       b. II & IV        c. III, IV      d. I & IV

3. What are the bivalent metallic ions found in ribosome :-
a. Mg++          b. Ca++           c. Mn++         d. All of these

4. What is the size and diameter of ribosome respectively:-

a. Size:-210- 340 A0 diameter:- 170-240A0         b. Size:-200-440 A0 diameter:- 170-240A0         c. Size:-100-340 A0 diameter:- 180- 240A0        d. Size:-200-340 A0 diameter:- 170-240A0
00
5. Choose the incorrect statement about the presence of ribosome :-
a. found in prokaryotic cell        b. found in eukaryotic cell        c. found in plant & animal cell      d. found in sperm & matured RBC

6. Which is the most abundant cell organelle in the cell :-
a. ER        b. Mitochondria       c. Ribosome        d. Nucleus

7. The first cell organelle to be first seen under electron microscope:-
a. Nucleolus      b. Chromosome      c. DNA       d. Ribosome

8. Given below are assertion and reason. Point out if both are true and the reason is correct explanation (a). both are true but reason is not correct explanation (b), assertion is true but reason is wrong (c) : and both are wrong (d).
Assertion:- Ribosome is regarded as the protein factory of the cell.
Reason :- In ribosome polypeptide chain formation takes place

a. a       b. b      c. c       d. d

9. Choose the correct statement about the number of ribosome in a cell depends on :-
Option:-
I. Number of ribosomes in a cell is directly related to the DNA content of the cell.
II. Number of ribosomes in a cell is directly related to the Nucleolus content of the cell.
III. Number of ribosomes in a cell is directly related to the RNA content of the cell.
IV. Number of ribosomes in a cell is directly related to the r-RNA content of the cell.
V. Number of ribosomes in a cell is directly related to the cytoplasmic content of the cell.
Choose the correct option:-
a. I only       b. II, III & V        c. III only      d. I, II, III, IV & V

10. Ribosome was first observed by :-
a. Claude       b. Palade       c. Robinson & Brown      d. None of these

11. Who named ribosome as microsome :-
a. Palade      b. Robinson       c. Brown     d. Claude

12. Robinson and Brown (1950) noticed ribosome in plant cells of:-
a. Maize root       b. Pea root    c. Vicia root     d. Solanum root

13. Which statemet is correct about Ribosome attachment to RER:-
Option:-
I. Glycoprotein
II. Ribophorin - I
III. Ribophorin - II
IV. Ribophorin - III
V. Mucoprotein
Choose the correct option:-
a.I & III     b. II & III       c. I, II & III       d. IV & V

14. 73 S ribosome is found in :-
a. nucleolus      b. nucleus       c. mitochondria      d. plastid

15. Ergasome contains how many ribosome on single mRNA:-
a. 3 to 7      b. 6 to 8       c. 8 to 10    d. 1 to 3

16. What is the rRNA & Protein ratio of 70 S ribosome:-
Choose the correct option:-
a. 60-65 : 35-40    b.45 : 55     c. 2 : 1     d. Both ‘60-65 : 35-40’ & ‘2 : 1’

17. The different types of rRNA found in 70 S ribosome is/are :-
a. 16s, 23s, 5s       b. 16s, 28s, 5.8s, 5s       c. 18s, 28s, 5.8s, 5s       d. 16s, 23s, 5.8s, 5s

18.Choose the correct statement about the presence of rRNA & Proteins:-
Option:-
I. 70S ribosome has 55 proteins and 3 rRNA
II. 70S ribosome has 53 proteins and 3 rRNA with common protein with both subunit.
III. 80S ribosome has 75 proteins and 5 rRNA
IV. 80S ribosome has 73 proteins and 4 rRNA
V. 70S ribosome has 50 proteins and 3 rRNA
Choose the correct option:-
a. I & II     b. III & V     c. I, II & IV      d. I, II, III, IV & V

19. What is the ratio of rRNA & protein in 80S ribosome:-
a. 60-65 : 35-40      b. 2 : 1       c. 45 : 55 or 1 ; 1     d. None of these

20. In mammal mitochondria the type of ribosome is :-
a. 67 S       b. 55 S       c. 70 S     d. 73 S

21. When the concentration of Mg++ is less than 0.001 M then :-
a. Both the subunits of ribosome functionless.       b. Both the subunits of ribosome separate     c. Both the subunits of ribosome unite       d. All of these

22. When the concentration of Mg++ is more than 0.001 M then :-
a. Both the subunits of ribosome functionless.       b. Both the subunits of ribosome unite       c. Both the subunits of ribosome separate       d. All of these

23. The smaller subunit of ribosome has a head, base and a cleft that helps :-

a. for recognising tRNA during protein synthesis       b. for recognising and protecting mRNA during protein synthesis       c. for protecting larger subunit during protein synthesis       d. All of these

24. Lysosomal proteins are synthesized by :-
a. Free ribosome of cytoplam      b.Fixed ribosome of RER       c. Mitoribosome      d. All of these

25. Chaperons are specific proteins which help in folding and transport of proteins into organelles, are synthesized:-
a. fixed ribosome       b. free ribosomes        c. mitoribosome       d. Both ‘free ribosomes ’ & ‘mitoribosome’

26. Which organelle protect m-RNA inbetween two subunits from nuclease enzyme:-
a. RER       b. Ribosomes       c. Mitoribosome       d. Plastido ribosome

27. In eukaryotes, synthesis of 80S ribosomes is :-
a. totally nucleolar        b. partly nucleolar and partly mitochondria       c. partly nucleus and partly cytoplasmic        d. partly nucleolar and partly cytoplasmic

28. 5.8S, 18S and 28S rRNA of 80 S ribosome are transcribed by:-
a. rRNA genes (rDNA) of Nucleus        b. ribo - genes (rDNA) of Nucleolar organising region (NOR)       c. rRNA genes (rDNA) of perichromatic nucleolus      d. rRNA genes (rDNA) of Nucleolar organising region (NOR)

29. 5S rRNA is synthesized:-
a. outside nucleolus in cytoplasm        b. outside nucleolus in mitochondria       c. outside nucleolus in nucleus        d. outside nucleolus in RER

30. Sedimentation coefficient or Svedberg unit is equal to:-
a. Ribosomes and centriole are non-membrane bound organelles of a cell      b. Ribosomes are enveloped by a double membrane       c. Plasmodesmata are the cytoplasmic connections between cells       d. Cell membrane is semipermeable or selectively permeable

31. Select the false statement:-
a. 1 X 10-14 sec       b. 1 X 10-11 sec        c. 1 X 10-12 sec       d. 1 X 10-13 sec

32. Secretory proteins and other proteins such as those to be incorporated into biomembranes are synthesized on:-
a. free ribosome       b. bound ribosome       c. RER      d. mitoribosome

33. Identify the incorrect statement:-
a. Glycoprotein and glycolipids of plasma membrane facilitate cellular recognition and adhesion       b. The semipermeable membrane surrounding the vacuole is called tonoplast      c. Gametes of plants are without cell wall        d. Ingestion of solid particles is called pinocytosis


34. Protein to lipid ratio in Golgi bodies and endoplasmic reticulum is:-

a. 50 : 50        b. 40 : 60       c. 60 : 40      d.None of these

35. Which of the following statements is correct :-
a. Ribosomes do not contain DNA      b. Eukaryotic 80 S ribosomes break into 50 S      c. Plasmodesmata are found as intercellular between animal cells       d. Ribosomes were discovered by Beadle and Tatum

36. Ribosomes are so called because of high:-
a. ribose content       b. RNA content       c. Both (ribose content) and (RNA content)       d. None of these

37. Nucleoprotein in a cell are synthesized in:-
a. nucleolus       b. nuclear membrane       c. outside the nucleus     d. nucleoplasm

38. RER is frequently observed in the cells actively involved in the:-
a. synthesis of lipids      b. synthesis of steroidal hormones       c. protein synthesis and secretion       d.All of the above

39. Choose the correct statement:-
a. ribosomal subunits are united during protein synthesis.       b. Ribosomal subuits always remain united.       c. Ribosomal subunits are united in nucleus during r-RNA synthesis.      d. All are correct statements.

40. Non membranous cell organelles are:-
a. Mitochondria       b. Ribosomes     c. ER and Nucleolus      d. Ribosomes and Centrioles

41.Site of formation of ribosomal precursor/ribosomal subunits in cell is:-
a. Nucleus       b. Nucleolus      c. Golgi body      d. Stroma

42. The only organelle found in PPLO is:-
a. Nucleus        b. Ribosome       c. Plastids        d. Vacuoles

43. Which is absent in intact cells ?
a. Ribosomes      b. Microsome      c. Lomasomes      d. Dictyosomes

44. Cells specialize in protein secretions have a large proportion of:-
a. free ribosomes       b. bound ribosome       c. golgi bodies       d. ER

45. 
Match the following:-

 

Column I

 

Column II

A

Karyolymph

1

Nucleolus

B

Ribonucleoprotein

2

Nucleus

C

Spindle fibre

3

DNA

D

Genes

4

Centrioles

D

Rough endoplasmic reticulum

4

Protein synthesis

a.  A - 1, B - 2 , C - 4 , D - 3, E - 5 
b.  A - 4, B - 2 , C - 3 , D - 5, E - 1
c. A - 1, B - 2 , C - 3 , D - 4, E - 5 
d. A - 2, B - 1 , C - 4 , D - 3, E - 5

46. Identify ‘A’ in the given diagram and choose the correct answer:-


a. Peptidyl site       b. Amino acyl site      c. Exit site      d. mRNA site

47. Identify ‘D’ in the given diagram and choose the correct answer.


a. Peptidyl site       b. mRNA site       c. Amino acyl site       d. None

48. Identify ‘B in the given diagram and choose the correct answer.


a. Aminoacyl site       b. Peptidyl site       c. mRNA site       d. Exit site

49. Identify ‘C in the given diagram and choose the correct answer.


a. Exit site        b. Amino acyl site        c. Peptidyl site         d. mRNA site.

50. Most proteins to be used within cytosol (cytoplasmi) are synthesized on:-

a. free ribosome     b. bound ribosomes       c. golgi bodies        d. nucleus.

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