Oral Histology MCQs

Option A: Hyperplasia

Option B: Hypoplacification

Option C: Normal development

Option D: Interstitial development

Correct Answer: Normal development ✔

Option A: A cell from which tooth enamel is formed:

Option B: A tissue from which tooth erupts

Option C: A tumour of the jaw

Option D: Pertaining to dentin

Correct Answer: A cell from which tooth enamel is formed: ✔

Option A: Key hole or paddle shaped

Option B: Square

Option C: Round

Option D: None of the above

Correct Answer: Key hole or paddle shaped ✔

Option A: Odontodysplasia

Option B: Amelogenisis stage

Option C: Desmolytic stage

Option D: Mottled enamel

Correct Answer: Odontodysplasia ✔

Option A: Stratum inter medium

Option B: Stellate reticulum

Option C: Outer enamel epithelium

Option D: Cervical loop

Correct Answer: Cervical loop ✔

Option A: Enamel spindles

Option B: Enamel lamella

Option C: Enamel tufts

Option D: Perikymata

Correct Answer: Enamel lamella ✔

Option A: In cross sections enamel rods appear hexagonal and resembles fish scales

Option B: The bodies of rods are near occlusal and incisal surfaces, where as the tails point cervically

Option C: The apatite crystals are parallel to bodies and deviate 65° from the tails

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Greater than the thickness of enamel

Option B: Less than the thickness of enamel

Option C: Equal to the thickness of enimal

Option D: None of the above

Correct Answer: Greater than the thickness of enamel ✔

Option A: 2.8

Option B: 3.8

Option C: 4.8

Option D: 2.3

Correct Answer: 2.8 ✔

Option A: Tono filament

Option B: Keratin like fibre

Option C: Collagen fibre

Option D: Vimentin filament

Correct Answer: Keratin like fibre ✔

Option A: Enamel

Option B: Dentin

Option C: Cementum

Option D: Periodontal ligament

Correct Answer: Enamel ✔

Option A: Hunter schreger bands

Option B: Enamel spindles

Option C: Enamel tufts

Option D: Enamel lamellae

Correct Answer: Enamel spindles ✔

Option A: Enamel of primary incisors

Option B: Enamel of permanent canines

Option C: Enamel and dentin of permanent first molars

Option D: Dentin of permanent mandibular incisors

Correct Answer: Enamel of permanent canines ✔

Option A: 5 million

Option B: 7 million

Option C: 9 million

Option D: 12 million

Correct Answer: 12 million ✔

Option A: Produced by ameloblasts

Option B: Found in the region of cusps

Option C: Surrounded by inter prismatic enamel

Option D: Terminate as rounded process

Correct Answer: Produced by ameloblasts ✔

Option A: Enamel spindles

Option B: Gnarled enamel

Option C: Incremental lies of woven

Option D: Incremental lines of retzius

Correct Answer: Gnarled enamel ✔

Option A: 1:4

Option B: 1:1

Option C: 1:2

Option D: 2:1

Correct Answer: 1:1 ✔

Option A: Thin tuft like structure extending from enamel surface of dentin enamel junction

Option B: Tuft like structure arising from dentin-enamel junction towards enamel surface

Option C: Odontoblastic processes extending into enamel

Option D: None of the above

Correct Answer: Tuft like structure arising from dentin-enamel junction towards enamel surface ✔

Option A: Cervical third of buccal surface

Option B: Middle third of buccal surface

Option C: Middle third of lingual surface

Option D: Occlusal surface

Correct Answer: Occlusal surface ✔

Option A: Enamel rods

Option B: Incremental lines of retzius

Option C: Nasmyth’s membrane

Option D: Pellicle

Correct Answer: Incremental lines of retzius ✔

Option A: Resorption of roots of deciduous incisors and canines begins on their lingual surfaces

Option B: Resorption of roots of deciduous molars begins on their inner surfaces

Option C: Shedding of deciduous teeth is delayed in the absence of their successor teeth

Option D: None of the above

Correct Answer: None of the above ✔

Option A: Non-keratinized epithelium is characterized by absence of stratum granulosum and stratum corneum, The surface cells are nucleated

Option B: Parakeratinished epithelium is characterized by superficial cells with pyknotic nuclei and absence of stratum granulosum

Option C: In ortho keratinisation the superficial cells lose their nuclei, but stratum granulosum is present

Option D: All of the above

Correct Answer: All of the above ✔

Option A: gingiva and alveolar mucosa

Option B: Hard palate and gingiva

Option C: Buccal andalveolar mucosa

Option D: Hard and soft palate

Correct Answer: Hard palate and gingiva ✔

Option A: Lips

Option B: Tongue

Option C: Roof of the soft palate

Option D: Oropharynx

Correct Answer: Roof of the soft palate ✔

Option A: Appear as circular with an amorphous core in keratinized epithelium

Option B: Originate from golgi system

Option C: Packed with tonofilaments

Option D: Helps in adhesion of fully keratinized epithelial cells

Correct Answer: Originate from golgi system ✔

Option A: Contains lamina lucida & Lamina dura

Option B: Consists luratihyaline granules

Option C: consists of lamina densa and lamina lucida

Option D: consists of desmosomes and hemi desmosomes

Correct Answer: consists of lamina densa and lamina lucida ✔

Option A: Melanocyte

Option B: Lymphocyte

Option C: Merkel cell

Option D: Langerhans cell

Correct Answer: Langerhans cell ✔

Option A: Foliate

Option B: Filiform

Option C: Circumvallate

Option D: Fungiform

Correct Answer: Circumvallate ✔

Option A: Keratinocytes

Option B: Mast cells

Option C: Melanocytes

Option D: Myoepithelila cells

Correct Answer: Melanocytes ✔

Option A: Primary attachment epithelium

Option B: Secondary attachment epithelium

Option C: Primary enamel cuticle

Option D: Reduced enamel epithelium

Correct Answer: Primary attachment epithelium ✔

Option A: It contains more No. of sweat glands

Option B: It contains more do. of sebaceous glands

Option C: It contains less number of sebaceous glands

Option D: It contains less number of sweat glands

Correct Answer: It contains less number of sebaceous glands ✔

Option A: Due to alternate elevations and depressions in epithelium

Option B: Functional adaptation to mechanical impact

Option C: Disappeared in progressing gingivitis due to edema and this change is reversible

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Langhan’s cell

Option B: RBC

Option C: Langerhans cell

Option D: Grey cell

Correct Answer: Langerhans cell ✔

Option A: Fungiform

Option B: Filiform

Option C: Circumvallate

Option D: Foliate

Correct Answer: Filiform ✔

Option A: Keratinised

Option B: Non keratinized

Option C: Parakeratinised

Option D: Orthokeratinized

Correct Answer: Orthokeratinized ✔

Option A: Has no rete pegs

Option B: Has prominent rete pegs

Option C: Is keratinized

Option D: Is para-keratinized

Correct Answer: Has no rete pegs ✔

Option A: Alveolar mucosa

Option B: Floor of the mouth

Option C: Attached gingiva

Option D: Buccal mucosa

Correct Answer: Attached gingiva ✔

Option A: Lamina dura

Option B: Dental cuticle

Option C: Lamina propria

Option D: Fibroblasts

Correct Answer: Lamina propria ✔

Option A: Pink

Option B: Red

Option C: Coral pink

Option D: None of the above

Correct Answer: Coral pink ✔

Option A: Keratinized

Option B: Non keratinized

Option C: Ortho, para and non keratinized

Option D: Only para keratinized

Correct Answer: Ortho, para and non keratinized ✔

Option A: Shifts apically with age

Option B: Shifts coronally with age

Option C: Constant throughout the life

Option D: None of the above

Correct Answer: Constant throughout the life ✔

Option A: St. granulosum

Option B: St. spinosum

Option C: St. basale

Option D: Prickle cell layer

Correct Answer: St. granulosum ✔

Option A: Tip

Option B: Sides

Option C: Back

Option D: Front

Correct Answer: Back ✔

Option A: Fibro blast

Option B: Odontoblasts

Option C: Cementoblasts

Option D: Merkel cells

Correct Answer: Fibro blast ✔

Option A: Larger than the basal cells

Option B: Smaller than the basal cells

Option C: same size as that of basal cells

Option D: None of the above

Correct Answer: Larger than the basal cells ✔

Option A: Melanocyte

Option B: Merkel cells

Option C: Langerhan cell

Option D: Keratinocyte

Correct Answer: Langerhan cell ✔

Option A: 0.004-0.005 ppm

Option B: 0.006-0.007 ppm

Option C: 0.007-0.005 ppm

Option D: 0.007-0.08 ppm

Correct Answer: 0.007-0.005 ppm ✔

Option A: Involucrin

Option B: Vinculin

Option C: Filaggrin

Option D: Nectin

Correct Answer: Filaggrin ✔

Option A: Fungiform

Option B: Filiform

Option C: Circumvallate

Option D: Foliate

Correct Answer: Filiform ✔

Option A: Basal cell layer

Option B: Granular cell layer

Option C: Spinous cells and granular cells

Option D: Basal cells and parabasal spinous cells

Correct Answer: Basal cells and parabasal spinous cells ✔

Option A: Reticular fibers

Option B: Collagen fibers

Option C: Hemidesmosomes

Option D: Desmosomes

Correct Answer: Hemidesmosomes ✔

Option A: Keratinized

Option B: Non-keratinized

Option C: Parakeratinised

Option D: Orthokeratinized

Correct Answer: Non-keratinized ✔

Option A: Para keratinised

Option B: Ortho keratinised

Option C: Non keratinised

Option D: Sub keratinised

Correct Answer: Ortho keratinised ✔

Option A: Impaction

Option B: Gingivitis

Option C: Occlusal wear

Option D: Gingival recession

Correct Answer: Gingival recession ✔

Option A: Attachment of ameloblasts to the tooth

Option B: Microscopically it resembles basal lamina

Option C: Derived from secondary attachment epithelium

Option D: All of the above

Correct Answer: All of the above ✔

Option A: It attached to buccinator muscle in cheeks

Option B: It attached to orbicularis oris in lips

Option C: A & B are correct

Option D: None of the above

Correct Answer: A & B are correct ✔

Option A: Sensory function

Option B: Secretory function

Option C: Neuro sensory

Option D: Nutritive function

Correct Answer: Neuro sensory ✔

Option A: Auxillary olfactory sense organ

Option B: Ellipsoid/Cigar shaped

Option C: Undergoes degeneration after 4 months of intrauterine life

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Stratum basale

Option B: Stratum granulosum

Option C: Stratum basale and parabasal spinous cells

Option D: Stratum spinosum

Correct Answer: Stratum basale ✔

Option A: Sustenticular cells

Option B: Taste cells

Option C: Von ebner cells

Option D: Acini

Correct Answer: Sustenticular cells ✔

Option A: I

Option B: II

Option C: III

Option D: IV

Correct Answer: I ✔

Option A: Gingiva and anterior part of hard palate

Option B: Tongue and soft palate

Option C: Retromolar area and hard palate

Option D: Lip and posterior third of the hard palate

Correct Answer: Gingiva and anterior part of hard palate ✔

Option A: Thin lamina and non keratinized mucosa of cheek

Option B: Keratinized mucosa of cheek

Option C: Rete pegs

Option D: Thick lamina propria on skin of cheek

Correct Answer: Thin lamina and non keratinized mucosa of cheek ✔

Option A: Buccal gingiva

Option B: Lingual gingiva

Option C: Oral surface of lip

Option D: Sublingual mucosa (floor of mouth)

Correct Answer: Sublingual mucosa (floor of mouth) ✔

Option A: 30% Sebaceous glands

Option B: 75% sebaceous glands

Option C: very small number of sebaceous glands, if any

Option D: Absolutely no sebaceous glands

Correct Answer: very small number of sebaceous glands, if any ✔

Option A: Floor of the mouth and soft palate

Option B: Alveolar mucosa and vestibular fornix

Option C: Lip and cheek

Option D: Gingiva and hard palate

Correct Answer: Gingiva and hard palate ✔

Option A: Epidermis

Option B: Papillary layer of dermis

Option C: Reticular of dermis

Option D: Hypodermis

Correct Answer: Epidermis ✔

Option A: Attached gingiva

Option B: Free gingiva

Option C: Interdental papilla

Option D: Gingival sulcus

Correct Answer: Gingival sulcus ✔

Option A: Hyper orthokeratosis

Option B: Hyper parakeratosis

Option C: Non keratinized epithelium

Option D: Sulcular epithelium

Correct Answer: Hyper parakeratosis ✔

Option A: Internal basal lamina

Option B: Junctional epithelium

Option C: Reduced enamel epithelium

Option D: Epithelial attachment

Correct Answer: Junctional epithelium ✔

Option A: Keratinizing cells

Option B: Melanocytes

Option C: Non-Keratinizing cells

Option D: Clear cells

Correct Answer: Keratinizing cells ✔

Option A: Type I and III collagen

Option B: Type III collagen

Option C: Type IV collagen

Option D: Type I collagen

Correct Answer: Type IV collagen ✔

Option A: Circumvallate

Option B: Filliform

Option C: Foliate

Option D: Fungiform

Correct Answer: Circumvallate ✔

Option A: Increased ribonucleic acid

Option B: Acidic ground substance

Option C: Increased mitochondria

Option D: Presence of basic ground substance

Correct Answer: Increased ribonucleic acid ✔

Option A: 100

Option B: 75

Option C: 50

Option D: 25

Correct Answer: 75 ✔

Option A: Enamel

Option B: Dentin

Option C: Cementum

Option D: Pulp

Correct Answer: Pulp ✔

Option A: Hydrostatic

Option B: Vascular pressure

Option C: Oncotic pressure

Option D: Masticatory pressure

Correct Answer: Masticatory pressure ✔

Option A: Dentin

Option B: Cementum

Option C: Epithelial rest cells

Option D: The Epithelial diaphragm

Correct Answer: Cementum ✔

Option A: Eosin & haematoxylin

Option B: Carbol fuschin

Option C: Sudan III

Option D: Cresyl violet

Correct Answer: Sudan III ✔

Option A: Saline

Option B: Xylene

Option C: 10% Formalin

Option D: 10% alcohol

Correct Answer: 10% Formalin ✔

Option A: Embedded in paraffin and sectioned

Option B: Embedded in paradion and sectioned

Option C: Frozen and sectioned

Option D: Specimens ground into thin sections

Correct Answer: All of the above ✔

Option A: Acid phosphatase

Option B: Alkaline phosphatase

Option C: Adenosine triphosphate

Option D: Amino peptidase

Correct Answer: Alkaline phosphatase ✔

Option A: Between temporal and sphenoid bone

Option B: Between hamular notch and mandible

Option C: In apical area of a tooth

Option D: As a part of deep cervical fascia

Correct Answer: As a part of deep cervical fascia ✔

Option A: Hydrodynamic theory

Option B: Clone theory

Option C: Periodontal ligament traction theory

Option D: Vascular theory

Correct Answer: Periodontal ligament traction theory ✔

Option A: Stable

Option B: Over erupted

Option C: Supra erupted

Option D: Submerged

Correct Answer: Supra erupted ✔

Option A: Physiological tooth migration

Option B: Active eruption

Option C: Passive eruption

Option D: None of the above

Correct Answer: Active eruption ✔

Option A: Booster Mechanism

Option B: Seeding theory

Option C: Alkaline Phosphatase theory

Option D: Cartier/s Adenosine Triphosphate theory

Correct Answer: Seeding theory ✔

Option A: 25th day of Intra uterine life

Option B: 34th day of Intra uterine life

Option C: 56th day of Intra uterine life

Option D: 20 wks of Intra uterine life

Correct Answer: 56th day of Intra uterine life ✔

Option A: Enamel prismatic arrangement

Option B: Dentinal tubule arrangement

Option C: Primary and secondary dentin

Option D: Mineral content

Correct Answer: Enamel prismatic arrangement ✔

Option A: Type I

Option B: Type II

Option C: Type III

Option D: Type IV

Correct Answer: Type I ✔

Option A: Incremental lines of retzius

Option B: Incremental lines of von Ebner

Option C: Contour lines lines of owen

Option D: None of the above

Correct Answer: Contour lines lines of owen ✔

Option A: Permanent teeth

Option B: Deciduous teeth

Option C: Succedaneous teeth

Option D: None of the above

Correct Answer: Succedaneous teeth ✔

Option A: Osteoblast

Option B: Fibrocytes

Option C: Polymorphs

Option D: Osteoclasts

Correct Answer: Osteoclasts ✔

Option A: Fat

Option B: Mucin

Option C: Cartilage

Option D: Iron

Correct Answer: Fat ✔

Option A: By using 10% formalin

Option B: By using liquid or solid Co2

Option C: By using increasing percentages of alcohol

Option D: By using 5% nitric acid

Correct Answer: By using increasing percentages of alcohol ✔

Option A: 10% formalin

Option B: 40% formalin

Option C: 20% formalin

Option D: 10% alcohol

Correct Answer: 10% formalin ✔

Option A: Reduced enamel epithelium

Option B: Dental papilla

Option C: Inner enamel epithelium

Option D: Dental sac

Correct Answer: Reduced enamel epithelium ✔

Option A: Lingual to primary teeth

Option B: Inferior to primary teeth

Option C: Labial to primary teeth

Option D: A and B

Correct Answer: A and B ✔

Option A: Primary teeth

Option B: Permanent teeth

Option C: Both A and B

Option D: None of the above

Correct Answer: Permanent teeth ✔

Option A: Osteoclasts

Option B: Osteoblasts

Option C: Odontoclasts

Option D: Odontoblasts

Correct Answer: Odontoclasts ✔