MCQOPTIONS
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MCQOPTIONS
This section includes 370 Mcqs, each offering curated multiple-choice questions to sharpen your Medical Subjects knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The major cells seen in gingiva are______________? |
| A. | Fibro blast |
| B. | Odontoblasts |
| C. | Cementoblasts |
| D. | Merkel cells |
| Answer» B. Odontoblasts | |
| 102. |
The main function of horizontal fibres of P.D ligament is____________? |
| A. | Prevent extrusion |
| B. | Prevent rotation |
| C. | Maintains the mesiodistal width |
| D. | All of the above |
| Answer» D. All of the above | |
| 103. |
The main bulk of dentin is formed by______________? |
| A. | Peritubular dentin |
| B. | Mantle dentin |
| C. | Inter tubular dentin |
| D. | Predentin |
| Answer» D. Predentin | |
| 104. |
The key hole, pattern appearance in the cross section is feature of______________? |
| A. | Aprismatic enamel |
| B. | Prismatic enamel |
| C. | Intertubular dentin |
| D. | Intratubular dentin |
| Answer» C. Intertubular dentin | |
| 105. |
The intimal B cells of synovical memrbane of temporomandibular joint are_______________? |
| A. | Fibroblast like |
| B. | Macrophage like |
| C. | Lmphocyte like |
| D. | Plasma cell like |
| Answer» B. Macrophage like | |
| 106. |
The high level clear cell present in the oral epithelium is_____________? |
| A. | Melanocyte |
| B. | Lymphocyte |
| C. | Merkel cell |
| D. | Langerhans cell |
| Answer» E. | |
| 107. |
The hertwig’s epithelial root shealth is essential to development of the root because it_______________? |
| A. | Gives rise to cementoblasts that produce cementum of the root |
| B. | Moulds the shape of roots and stimulates differentiation of odontoblasts |
| C. | Given rise to odontoblasts that lay down dentin of the root |
| D. | Remians as an essential constituents of the periodontal ligament |
| Answer» C. Given rise to odontoblasts that lay down dentin of the root | |
| 108. |
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 |
| Answer» C. The glossopalatine glands | |
| 109. |
The function of myoepithelial cells may be______________? |
| A. | Initiating contraction |
| B. | Support for the end piece during active secretion of saliva |
| C. | Provide signals to the acinar secretary cells for structure organization |
| D. | All of the above |
| Answer» E. | |
| 110. |
The function of merkel cells is_______________? |
| A. | Sensory function |
| B. | Secretory function |
| C. | Neuro sensory |
| D. | Nutritive function |
| Answer» D. Nutritive function | |
| 111. |
The formative cells of which of the following dental tissues disappear once tissue is formed___________? |
| A. | Enamel |
| B. | Dentin |
| C. | Periodontal ligament |
| D. | Cementum |
| Answer» B. Dentin | |
| 112. |
The formation of the dental lamina is initiated by______________? |
| A. | Forebrain |
| B. | Rathke’s pouch |
| C. | Neural crest cells |
| D. | Odontoblasts |
| Answer» D. Odontoblasts | |
| 113. |
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 |
| Answer» D. All of the above | |
| 114. |
The first sign of future deciduous teeth as a thickening of oral ectoderm appears at about_____________? |
| A. | 25th day of Intra uterine life |
| B. | 34th day of Intra uterine life |
| C. | 56th day of Intra uterine life |
| D. | 20 wks of Intra uterine life |
| Answer» D. 20 wks of Intra uterine life | |
| 115. |
The fibroblasts associated with capillaries are__________? |
| A. | Plasma cell |
| B. | Histocytes |
| C. | Lymphocytes |
| D. | Pericytes |
| Answer» E. | |
| 116. |
The enamel of the posterior teeth is thickest at____________? |
| A. | Cervical third of buccal surface |
| B. | Middle third of buccal surface |
| C. | Middle third of lingual surface |
| D. | Occlusal surface |
| Answer» E. | |
| 117. |
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 |
| Answer» C. It is essentially a keratin tissue and has no blood vessels | |
| 118. |
The duct(s) of gland(s) opening into the floor of the mouth is (are)_______________? |
| A. | Submandibular and sublingual |
| B. | submandibular and parotid |
| C. | Sublingual and parotid |
| D. | Von Ebner |
| Answer» B. submandibular and parotid | |
| 119. |
The disturbances occurred during Calcification stage of tooth development is seen in_____________? |
| A. | Peg laterals |
| B. | Microdontia |
| C. | Supernumerary tooth |
| D. | Interglobular dentin |
| Answer» E. | |
| 120. |
The diameter of the rod is______________? |
| A. | 4 μ m |
| B. | 9 μ m |
| C. | 7 μ m |
| D. | 2 μ m |
| Answer» B. 9 μ m | |
| 121. |
The diameter of the largest arterial vessels in the pulp range from_____________? |
| A. | 50-100 μm |
| B. | 101-150 μm |
| C. | 151-200 μm |
| D. | 201-250 μm |
| Answer» B. 101-150 μm | |
| 122. |
The development of pulp begins__________? |
| A. | 6th week of IU |
| B. | 8th week of IU |
| C. | 10th week of IU |
| D. | 18th week of IU |
| Answer» C. 10th week of IU | |
| 123. |
The dentin receptors are unique because_____________? |
| A. | They elicit pain to hot and cold |
| B. | They elicit pain to touch and pressure |
| C. | They elicit pain to chemicals |
| D. | Elicit only pain as a response |
| Answer» E. | |
| 124. |
The dentin adjacent to the dentinoenamel junction is called the______________? |
| A. | Mantle dentin |
| B. | Circumpulpal dentin |
| C. | Predentin |
| D. | Secondary dentin |
| Answer» B. Circumpulpal dentin | |
| 125. |
The dental pulp contains nerve endings/receptors for____________? |
| A. | Pain |
| B. | Pressure |
| C. | Proprioception |
| D. | Temperature |
| Answer» B. Pressure | |
| 126. |
The dental pulp is derived form____________? |
| A. | Dental papilla |
| B. | Dental sac |
| C. | Odontoblasts |
| D. | Stellate reticulum |
| Answer» B. Dental sac | |
| 127. |
The deciduous teeth can be differentiated from permanent teeth by_____________? |
| A. | Enamel prismatic arrangement |
| B. | Dentinal tubule arrangement |
| C. | Primary and secondary dentin |
| D. | Mineral content |
| Answer» B. Dentinal tubule arrangement | |
| 128. |
The content of saliva include all except____________? |
| A. | Amylase |
| B. | Urea |
| C. | Lysoenzyme |
| D. | Lipase |
| Answer» E. | |
| 129. |
The connective tissue of the gingiva is known as the______________? |
| A. | Lamina dura |
| B. | Dental cuticle |
| C. | Lamina propria |
| D. | Fibroblasts |
| Answer» D. Fibroblasts | |
| 130. |
The condyle of mandible is composed of____________________? |
| A. | Compact bone |
| B. | Cancellous bone |
| C. | Cancellous bone covered by thin layer of compact bone |
| D. | Compact bone covered by cancellous bone |
| Answer» D. Compact bone covered by cancellous bone | |
| 131. |
The components of future TMJ shows development at_____________? |
| A. | 6 weeks |
| B. | 18 weeks |
| C. | 10 weeks |
| D. | 16 weeks |
| Answer» D. 16 weeks | |
| 132. |
The component of future T.M.J shows development at _____________? |
| A. | 6 weeks |
| B. | 10 weeks |
| C. | 18 weeks |
| D. | 16 weeks |
| Answer» C. 18 weeks | |
| 133. |
The class of low molecular weight calcium binding proteins seen predominantly in developing enamel are_____________? |
| A. | Enamelin |
| B. | Amelogenin |
| C. | Tuftelin |
| D. | Ameloplakin |
| Answer» C. Tuftelin | |
| 134. |
The cementuoenamel junction is approximately at the level at which the root canal becomes_____________? |
| A. | Twisted |
| B. | Curved |
| C. | Pulp chamber |
| D. | Lateral canal |
| Answer» D. Lateral canal | |
| 135. |
The cells, which are responsible for removal of bone matrix in bone resorption, are_____________? |
| A. | Osteoblast |
| B. | Fibrocytes |
| C. | Polymorphs |
| D. | Osteoclasts |
| Answer» E. | |
| 136. |
The cells that form secondary dentin are_______________? |
| A. | Cementoblasts |
| B. | Fibroblasts |
| C. | Odontoblasts |
| D. | Osteoblasts |
| Answer» D. Osteoblasts | |
| 137. |
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 |
| Answer» B. Cells of outer enamel epithelium | |
| 138. |
The cells of the dental pulp which are responsible for the deposition of reparative dentin are_________? |
| A. | Osteoblasts |
| B. | Odontoblasts |
| C. | Ameloblasts |
| D. | Osteocytes |
| Answer» C. Ameloblasts | |
| 139. |
The cell free zone in pulp lies____________? |
| A. | Above odontoblast |
| B. | Below odontoblast |
| C. | In radicular pulp |
| D. | In pulp horn |
| Answer» C. In radicular pulp | |
| 140. |
The cap stage in tooth development is characterized by_____________? |
| A. | morphodifferentiation |
| B. | reversal of functional polarity |
| C. | Formation of hammock ligament |
| D. | Increased mitotic activity |
| Answer» E. | |
| 141. |
The calcified mass found in the PDL are_____________? |
| A. | Cementicles |
| B. | Osteoblasts |
| C. | Cementoclasts |
| D. | Osteoclasts |
| Answer» B. Osteoblasts | |
| 142. |
The bud, cap and bell stage of the developing tooth are based, on growth of the______________? |
| A. | Stellate reticulum |
| B. | Dental papilla |
| C. | Enamel organ |
| D. | Dental sac |
| Answer» D. Dental sac | |
| 143. |
The average width of enamel rods is______________? |
| A. | 10mm |
| B. | 5mm |
| C. | 2mm |
| D. | 0.5mm |
| Answer» C. 2mm | |
| 144. |
The average life time of primary pulp in oral cavity is__________? |
| A. | 8.3 years |
| B. | 2 years |
| C. | 7 years |
| D. | 3 years |
| Answer» B. 2 years | |
| 145. |
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 |
| Answer» C. 0.2-0.3 microns | |
| 146. |
The attached apparatus of tooth is composed of______________? |
| A. | Gingiva, cementum and alveolar bone |
| B. | Gingiva and cementum |
| C. | Cementum and periodontal ligament |
| D. | Peridontal ligament the cementum and the alveolar bone |
| Answer» E. | |
| 147. |
The articular cartilage is characterized by all of the following features except_____________? |
| A. | It is devoid of perichondrium |
| B. | It has a rich nerve supply |
| C. | It is avascular |
| D. | It lacks the capacity to regenerate |
| Answer» C. It is avascular | |
| 148. |
The apical foramen of a fully developed permanent tooth is usually lined by_____________? |
| A. | Dentin |
| B. | Cementum |
| C. | Epithelial rest cells |
| D. | The Epithelial diaphragm |
| Answer» C. Epithelial rest cells | |
| 149. |
The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances___________________? |
| A. | Impaction |
| B. | Gingivitis |
| C. | Occlusal wear |
| D. | Gingival recession |
| Answer» E. | |
| 150. |
Secondary cementum is generally confined to_____________? |
| A. | Cervical third of the root |
| B. | Middle third of the root |
| C. | Apical third of the root |
| D. | No secondary cementum forms |
| Answer» D. No secondary cementum forms | |