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1) FACT: keratinised epithelium have lesser mitotic activity than non keratinised mucosa and buccal mucosa has the highest mitotic activity. Of the following tissues the one with maximum mitotic activity is:

One answer only.

   a)sulcular epitheliun

   b)hard palate

   c)junctional epithelium

   d)attached gingiva

   e)outer surface of marginal gingiva

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2) FACT: Stratified non keratinised epithelium is characterised by the expression of K4 and K13(oesophageal type cytokeratins) All the following about the sulcular epithelium is true EXCEPT:

One answer only.

   a)k4 and k13 are expressed.

   b)shows hydropic degeneration

   c)rete pegs are absent

   d)merkel cells are absent

   e)is non keratinised at all conditions.

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3) FACT: Mitochondria are decreasing in numbers when we move from the basal cells to the superficial layers All the following are true EXCEPT:

One answer only.

   a)TCA is active in the basal layers

   b)G-6- phsopatase enzyme is uniformly distributed in all the layers of sulcular epithelium.

   c)The differential distribution of glycolysis enzymes in different layers is also related to the keratinisation or the maturation process.

   e)Normally in gingival epithelium Pentose pathway shunt is present more in superficial layers that helps in aerobic glycolysis

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4) FACT: stratum granulosum is a layer of cells with keratohyalin granules which occupy most of the interior of the cells of this layer. All the following are true EXCEPT:

One answer only.

   a)The keratohyalin granules are precursors of filaggrin protein

   b)Degree of epithelial keratinisation is increased with age.

   c)Gingiva is more keratinised when compared with ventral surface of tongue.

   d)Keratinisation is decreased after menopause but is not related to the different phases of the menstrual cycle.

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5) FACT: The maximum width of the attached gingiva is present in the anterior region of the dental arch. The least width of attached gingiva is located with respect to

One answer only.

   a)2nd molar of maxillary arch

   b)2nd molar area of mandibular arch

   c)1 premolar area of maxillary arch

   d)1 premolar area of the mandibular arch

   e)variable

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6) FACT: Merkel cells, langerhans cells and melanocytes are called as non keratinocytes. All the following are correct EXCEPT:

One answer only.

   a)Merkel cells are absent in sulcular epithelium but present in junctional epithelium

   b)Langerhans cells are present in all layers of the oral epithelium.

   c)Keratinosomes are also called as Odland bodies and present in sulcular epithelium, but are absent in junctional epithelium.

   d)Keratinosomes are actually collection of keratin granules inside the cell.

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7) Of the following all are correct EXCEPT:

One answer only.

   a)Width of marginal gingiva- 1mm approximately

   b)Depth of gingival sulcus- 1.08 mm average for a young adult

   c)Normal depth of gingival sulcus increases up to 2.8mm with age

   d)The depth of the gingival sulcus always corresponds to level where the free gingival groove is located on the surface of the gingival.

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8) Length of junctional epithelium is

One answer only.

   a)0.25 mm - 1.35 mm

   b)0.5 - 1.5 mm

   c)0.65mm - 1.35mm

   d)1mm - 1.08 mm

   e)none of the above

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9) The Birbeck's granules are present in

One answer only.

   a)Merkel cells

   b)Langerhans cells

   c)Melanocytes

   d)Cells of the stratum granulosum.

   e)none of the above

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10) When the adjacent teeth have no attachment then the interdental gingiva has all the folllowing features EXCEPT:

One answer only.

   a)the interdental gingiva is attached loosely over the alveolar crest

   b)the interdental gingiva is valley shaped

   c)the interdental papilla is absent

   d)the interdental gingiva forms a rounded and smooth surface.

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11) Normal probing depth is

One answer only.

   a)1-2mm

   b)0.65-6mm

   c)2 -3 mm

   d)1.08-2.82mm

   e)There is no accepted normal value.

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12) Average depth of gingival sulcus as measured from histological sections normally is

One answer only.

   a)1.08mm

   b)1.8mm

   c)zero

   d)0.8mm

   e)none of the above

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13) The distance of the crest of the alveolar ridge to the cementoenamel junction is constant and is

One answer only.

   a)1.08mm

   b)1.8mm

   c)2.08mm

   d)0.8mm

   e)none of the above