Free Oral Histology MCQs Mock Test Online with Answers

Q1 : The marrow found in the mandible is____________?

A: All fatty marrow B: All red marrow C: All fibrous marrow D: A combination of fatty and fibrous marrow

Q2 : Thin leaf like structures that extend from enamel surface in to DEJ are____________?

A: Enamel spindles B: Enamel lamella C: Enamel tufts D: Perikymata

Q3 : The formation of which of the following does not represent normal physiologiacl process of dentin formation_______________?

A: Primary and secondary dentin B: Secondary dentin and circumpulpal dentin C: Tetiary dentin and sclerotic dentin D: All of the above

Q4 : The average diameter of coronal dentinal tubules near the pulp is____________?

A: 0.2-0.5 microns B: 2-3 microns C: 0.2-0.3 microns D: 7 microns

Q5 : Ionic exchange between enamel surface and environment______________?

A: Does not take place once enamel surface and invironment B: Stops after 2 years of eruption C: Continues till adult life D: Continues through out life

Q6 : Stippling’s______________?

A: Due to alternate elevations and depressions in epithelium B: Functional adaptation to mechanical impact C: Disappeared in progressing gingivitis due to edema and this change is reversible D: All of the above

Q7 : Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?

A: Third power of the diameter B: Sixth power of the diameter C: Square of the diameter D: Fourth power of the diameter

Q8 : Metalloprotienases are used in which stage of the amelogenesis_____________?

A: Organising B: Formative/ Secretory C: Protective D: Desmolytic

Q9 : Normal interincisal distance is____________________?

A: 48 mm B: 38 mm C: 58 mm D: 28 mm

Q10 : Ratio of diameter of enamel rods in the DEJ to the enamel surface is______________?

A: 1:4 B: 1:1 C: 1:2 D: 2:1

Q11 : In dysplasia mitotic figures are seen in_________________?

A: In basal layers of epithelium B: In surface layers only C: From basal layer to surface D: None of the above

Q12 : The connective tissue of the gingiva is known as the______________?

A: Lamina dura B: Dental cuticle C: Lamina propria D: Fibroblasts

Q13 : calcification in enamel starts at____________?

A: Enamel matrix B: Root C: CEJ D: DEJ

Q14 : Atypical or osteodentin is formed due to disturbance during____________?

A: Morphodifferentiation B: Histodifferentiation C: Apposition D: Initiation

Q15 : The time taken for primary tooth root completion after eruption_____________?

A: 3 years B: 1 years C: 2 years D: 1 month

Q16 : The glands of Blandin and Nuhn are_____________?

A: The posterior lingual glands B: The anterior lingual glands located near the apex of tongue C: The glossopalatine glands D: The palatine glands

Q17 : Which of the following is not correct?

A: Free denticles are entirely surrounded by pulp tissue(free of dentin) B: Embedded denticles are entirely surrounded by dentin (embedded in dentin) C: Attached denticles are partly fused with dentin D: False denticles contains many dentinal tubules

Q18 : All of the following is true about dentinal tubules except______________?

A: Inner pulpal layer contains more dentinal tubules than outer dentin layer B: The diameter of dentin tubules ranges from 5 to 7μm C: The diameter of dentinal tubule is more at pulpal layer than outer layer D: The bonding is more on the inner layer of dentin compared to outer surface

Q19 : Elongated rete pegs are seen in______________?

A: Alveolar mucosa B: Floor of the mouth C: Attached gingiva D: Buccal mucosa

Q20 : The periodontal ligament_____________?

A: Derives its blood supply primarily from the branches of vessels entering the pulp B: Has a slow rate of turn over C: Contains epithelial cells D: Comprises primarily of type II collagen

Q21 : During the formation of primary teeth_______________?

A: Enamel forms more cervically than dentin B: Enamel forms faster than dentin C: Dentin forms faster than enamel D: Processes of their cells remain in content with each other

Q22 : Korffs fibres are seen in______________?

A: Mantle dentin B: Secondary dentin C: Reactionary dentin D: Indeed dermal tubules

Q23 : Cementum that forms in conjunction with root end formation and eruption_____________?

A: Cellular cementum B: Acellular cementum C: Both of the above D: None of the above

Q24 : Stratum germinatum is_______________?

A: Stratum basale B: Stratum granulosum C: Stratum basale and parabasal spinous cells D: Stratum spinosum

Q25 : Hardness of fully mineralized cementum is_____________?

A: Less than dentin B: More than dentin C: Equal dentin D: None of the above

Q26 : Keratohyaline granules are found in________________?

A: St. granulosum B: St. spinosum C: St. basale D: Prickle cell layer

Q27 : Pericytes are found___________?

A: In thymus B: Around capillaries of pulp C: In gallbladder D: Along with heparin on surface of mast cells

Q28 : The process of recesses formation in maxillary sinus is most frequently seen with________________?

A: Zygomatic process B: Frontal process C: Alveolar process D: Palatine process

Q29 : The neutralization of saliva is due to______________?

A: Mucin B: Ammonia C: Amino acids D: Bicarbonates

Q30 : After the eruption of crown, reduced enamel is known as_____________?

A: Primary attachment epithelium B: Secondary attachment epithelium C: Primary enamel cuticle D: Reduced enamel epithelium

Q31 : Sharpey’s fibres are derived from_____________?

A: Hertwig’s root sheath B: Epithelial rests of malassez C: Alveolar bonez D: Dental follicle

Q32 : The most accepted theory of tooth eruption is____________?

A: Hydrodynamic theory B: Clone theory C: Periodontal ligament traction theory D: Vascular theory

Q33 : The thinnest epithelium of oral cavity is found in the____________?

A: Buccal gingiva B: Lingual gingiva C: Oral surface of lip D: Sublingual mucosa (floor of mouth)

Q34 : Hertwig’s epithelial root sheath is made up of_______________?

A: Outer and inner enamel epithelium B: Stratum intermedium C: Stellate reticulum D: Hyaline layer of Hopewell-smill

Q35 : An enzyme present in saliva which causes cell wall lysis____________?

A: Lysozhyme B: Peroxidase C: Lactoferin D: Hyaluronidase

Q36 : The primary cause of acantholysis in pemphigus vulgaris is___________?

A: auto immunity B: Intercellular oedema C: intra epithelial oedema D: chronic alcoholism

Q37 : Matrix vesicles_______________?

A: Are found in mantle dentin B: Contain collagen C: Produce alkaline phosphatase D: Inhibit mineralization

Q38 : Articular disc of tmj receives insertion from which muscle______________?

A: Medial pterygoid B: Massetor C: Temporalis D: Lateral pterygoid

Q39 : The key hole, pattern appearance in the cross section is feature of______________?

A: Aprismatic enamel B: Prismatic enamel C: Intertubular dentin D: Intratubular dentin

Q40 : Which of the following is true?

A: Maxillary sinus communicates with environment through middle meatus and nasal vestibule B: Maxillary sinus is four- sided pyramid C: In most of the cases, the main ostium is present in posterior third of hiatus semilunar D: All of the above

Q41 : Membrane coating granules may_____________?

A: Appear as circular with an amorphous core in keratinized epithelium B: Originate from golgi system C: Packed with tonofilaments D: Helps in adhesion of fully keratinized epithelial cells

Q42 : A special feature of the periodontal ligament fibroblasts is______________?

A: The number or organelles B: Presence of actin fibres and shape change C: size of the cells D: Collagen fibre formation

Q43 : The cells of the enamel organ which differentiate into future ameloblasts are_____________?

A: Cells of inner enamel epithelium B: Cells of outer enamel epithelium C: Cells of stellate reticulum D: Cells of stratum intermedium

Q44 : Bone at forming stage has_________________?

A: Osteoclasts, osteoblasts, osteoid B: Odontoblasts & megakaryocyte C: Megakaryocytes, osteoblasts, osteoclasts D: None of the above

Q45 : In multirooted teeth, formation of multiple roots is due to presence of_____________?

A: Epithelial diaphragm B: Cell rests of Malassez C: Toot bud division or bell stage D: None of the above

Q46 : Enamel pearls are found in_____________?

A: Occlusal surface of premolars B: Furcation areas of permanent molars C: On the incisal edges of incisors D: None of the above

Q47 : Unmyelinated nerve fibres of pulp are____________?

A: Sensory in nature B: Respond to hot and cold C: carry pain sensation D: Associated with blood vessels and are sympathetic in nature

Q48 : Cellular cementum is____________?

A: Cellular cementum is____________? B: Less calcified than acellular type C: More calcified than acellular type D: Less irregular

Q49 : Pap smear is used to detect dysplasia, carcinoma insitu and invasive carcinoma of uterine cervix. This is based on the principle of_______________?

A: Neoplastic cells are cohesive B: Neoplastic cells are are non cohesive C: Hyper chromatic and pleomorphism of tumour cells D: All of the above

Q50 : The swollen degenerating epithelial cell due to acantholysis is:__________?

A: Anitschow cell B: Tzanck cell C: Ghost cell D: Prickle cell

Q51 : Periodontal ligament has predominantly_________?

A: Type II collagen fibres B: Oxytalan fibres C: Elastic fibres D: Type I collagen fibres

Q52 : Width of PDL is_______________?

A: 0.10 mm B: 0.50 mm C: 0.25 mm D: 0.75 mm

Q53 : The fibroblasts associated with capillaries are__________?

A: Plasma cell B: Histocytes C: Lymphocytes D: Pericytes

Q54 : perikymata are the external surface manifestations of_____________?

A: Enamel rods B: Incremental lines of retzius C: Nasmyth’s membrane D: Pellicle

Q55 : Butt joint in cementoenamel junctions seen is _________% of cases?

A: 10% B: 30% C: 60% D: 90%

Q56 : Long connective tissue papillae and keratinized epithelia are a feature of these parts of oral mucosa____________?

A: gingiva and alveolar mucosa B: Hard palate and gingiva C: Buccal andalveolar mucosa D: Hard and soft palate

Q57 : Static bone cyst is a cyst developing from______________?

A: Infection of Salivary gland in the mandible B: Tissue of the odontogenic apparatus C: Tissue of the oral mucosa D: None of the above

Q58 : Cementicles are found in the_____________?

A: Gingiva B: Periodontal ligament C: Alveolar bone D: Cementum

Q59 : Remnants of the Hertwig’s root sheath are found in____________?

A: Gingiva B: Alveolar bone C: Periodontal ligament D: Cementum

Q60 : Insulin facilitates glucose uptake in____________?

A: Kidney tubules B: Red blood cells C: Brain D: Skeletal muscle

Q61 : Salivary gland stone most commonly involves___________?

A: Submandibular gland B: Parotid gland C: Sub lingual glands D: Lingual glands

Q62 : Cementum is_____________?

A: Avascular B: Vascular C: Has blood supply initially only D: None of the above

Q63 : Dead tracts in ground section appears as_____________?

A: Dentinal tubules B: Coarse fibril bundles arranged at right angle to the dentinal surface C: Black in transmitted light and white in reflected light D: White in transmitted light and dark in reflected light

Q64 : All are diseases of skin except:

A: Erythema multiforme B: Keratosis follicularis C: Erythema migrans D: Psoriasis form lesion

Q65 : Blood supply of ameloblast for most of its life cycle comes form_______________?

A: Dental papilla B: Reduced enamel organ C: Dental Sac D: Dental pulp

Q66 : The range of level of fluoride secreted by the glands into the mouth is_____________?

A: 0.004-0.005 ppm B: 0.006-0.007 ppm C: 0.007-0.005 ppm D: 0.007-0.08 ppm

Q67 : The incisal edges and the incisal thirds of facial surfaces of mandibular incisors and canines generally oppose lingual surfaces of maxillary incisor and canines _____________?

A: Within the incisor thirds B: At the junction of middle and cervical thirds C: At the linguo cervical ridges D: Immediately incisal to cingulam

Q68 :

A: Open faced nucleus in a cell signifies______________? B: That the cell is resting C: that the cell is active D: that the cell is in transition phase

Q69 : Nutrition for ameloblasts after 1st layer of enamel is laid is______________?

A: Dental sac B: Odontoblastic process C: Ree D: Dental Papilla

Q70 : The rest of malassez in the periodontal ligament are derived from_____________?

A: Dental pulp B: Lamina propria C: Odontogenic epithelium D: Vestibular lamina

Q71 : The cell free zone in pulp lies____________?

A: Above odontoblast B: Below odontoblast C: In radicular pulp D: In pulp horn

Q72 : In mineralization which one of the following is known as Epitaxy ?

A: Booster Mechanism B: Seeding theory C: Alkaline Phosphatase theory D: Cartier/s Adenosine Triphosphate theory

Q73 : Ions participating in clotting mechanism are________________?

A: Iron B: Copper C: Calcium D: Aluminum

Q74 : The common site for narcotizing sialometaplasia____________?

A: cheeks B: dorsum of tongue C: palate D: palate

Q75 : Chronological hypoplasia is_____________?

A: Hypoplasia of local origin B: Hypoplasia of systemic origin C: Hypoplasia of hereditary origin D: None of the above

Q76 : Pain originate in the pulp due to_________?

A: free nerve ending in cell rich zone B: free nerve ending at sub odontoblastic layer C: Krause bulb at the center of the pulp D: Meisseners corpuscles at cell rich zone

Q77 : The enamel has no capacity of self repair because______________?

A: It has only a small percent of organic content B: Its formative cells are lost once it is completely formed C: It is essentially a keratin tissue and has no blood vessels D: It has no direct connection with the active cells of the dental pulp

Q78 : The periodontal ligament is approximately_____________?

A: 0.25 mm in thickness B: 0.5 mm in thickness C: 0.75 mm in thickness D: mm in thickness

Q79 : The zone of dentin most recently formed and uncalcified is known as____________?

A: Mantle dentin B: Circumpulpal dentin C: Predentin D: Secondary dentin

Q80 : Inorganic content of enamel is about______________?

A: 35% B: 50% C: 4% D: 96%

Q81 : In which of the following papillae of the tongue are the taste buds predominantly located ?

A: Circumvallate B: Filliform C: Foliate D: Fungiform

Q82 : Among various glands, salivary gland secretion is unique in that, its secretions is unique in that, its secretion are controlled by___________?

A: Hormones B: Nerves C: Chemicals D: All of the above

Q83 : Following is derivative of dental lamina____________?

A: Epithelial rests of Malassez B: Enamel pearls C: Rests of serrae D: All of the above

Q84 : The most abundant principle fibre group in periodontal ligament is____________?

A: Horizontal B: Transeptal C: Apical D: Oblique

Q85 : Development of supporting tissues of the tooth is initiated by____________?

A: Cells of dental follicle B: Cells of odontogenic layer C: Cementoblasts D: Cells of the gingiva

Q86 : The main bulk of dentin is formed by______________?

A: Peritubular dentin B: Mantle dentin C: Inter tubular dentin D: Predentin

Q87 : Total volume of saliva secreted by submandibular gland daily is______________?

A: 750 ml B: 450 ml C: 1500 ml D: 1000 ml

Q88 : The oral epithelium is attached to the enamel via_______________?

A: Reticular fibers B: Collagen fibers C: Hemidesmosomes D: Desmosomes

Q89 : The 2nd most prominent cells in pulp are______________?

A: Fibroblasts B: defense cells C: Odontoblasts D: Histocytes or resting wandering cell

Q90 : Dendritic cell located in the stratified squamous keratinizing epithelium of the oral cavity include_____________?

A: Keratinocytes B: Mast cells C: Melanocytes D: Myoepithelila cells

Q91 : Basement membrane________________?

A: Contains lamina lucida & Lamina dura B: Consists luratihyaline granules C: consists of lamina densa and lamina lucida D: consists of desmosomes and hemi desmosomes

Q92 : Which dental tissue doesn’t contain nerves ?

A: Bone B: Dentin C: Cementum D: Pulp

Q93 : The primary function of the dental pulp is____________?

A: Nutritive B: Production of dentin C: Production of enamel D: Vascular supply to the teeth

Q94 : Nitrates are not used in______________?

A: CCF B: Esophageal spasm C: Renal colic D: Cyanide poisoning

Q95 : Which of the following is not correct ?

A: In case of pituitary gigantis, all sinuses assume a larger volume than normal B: In chronic infections, the pain may mimic neuralgia of dental origin C: Malignant lesions of maxillary sinus produce their manifestations in maxillary teeth D: None of the above

Q96 : Buccal mucosa is_______________?

A: Keratinized B: Non-keratinized C: Parakeratinised D: Orthokeratinized

Q97 : Epithelium of oral mucous membrane is_______________?

A: Keratinized B: Non keratinized C: Ortho, para and non keratinized D: Only para keratinized

Q98 : Which of the following is true?

A: Cutting cone or resorption tunnel is the area of resorption seen in alveolar bone B: CAMP or cyclic adenosine monophosphate levels are increased on pressure side of bone and this results in bone resorption C: Immature born / embryonic bone seen during fracture healing contains less calcified material and greater number of large osteocytes D: All of the above

Q99 : Which of the following is not true___________?

A: Alveolar bone proper surrounds the root and gives attachment to fibres of periodontal ligament B: supporting alveolar bone surrounds the alveolar bone proper and supports the socket C: The cortical plates are thinner in maxilla than in mandible D: They are thickest in anterior portion of jaw

Q100 : At the cemento enamel junction, which of the following occurs_____________?

A: Cementum meets enamel B: Cementum overlaps enamel C: Cementum does not meet enamel D: All of the above

Free Oral Histology MCQs Mock Test Online with Answers

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