331. Accessory canals result from____________?
A. Defects in cementogenesis
B. Dividing epithelial bridges
C. Break in Hertwig’s root sheath
D. Adherent epithelial rests
✅ The correct answer is option C. Break in Hertwig’s root sheath.
Oral Histology
332. The red zones of lips have_____________?
A. 30% Sebaceous glands
B. 75% sebaceous glands
C. very small number of sebaceous glands, if any
D. Absolutely no sebaceous glands
✅ The correct answer is option C. very small number of sebaceous glands, if any.
333. Which of the following enzymes are involved in bone formation________________?
A. Alkaline phosphatase and urease
B. Catalase and phosphorylase
C. Alkaline phosphatase and phosphorylase
D. Acid phosphatase and catalase
✅ The correct answer is option C. Alkaline phosphatase and phosphorylase.
334. Incremental lines of Retzius appear_____________?
A. As lines in the enamel running at right angles to the enamel surface
B. As lines in the dentin running at right angles to the dentino-enamel junction
C. In enamel and follow the apposition pattern
D. In dentin and follow the appositional pattern
✅ The correct answer is option C. In enamel and follow the apposition pattern.
335. Cementum is_____________?
A. Avascular
B. Vascular
C. Has blood supply initially only
D. None of the above
✅ The correct answer is option A. Avascular.
336. 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
✅ The correct answer is option C. Apical third of the root.
337. 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
✅ The correct answer is option C. Alveolar process.
338. The position of mucogingival line____________________?
A. Shifts apically with age
B. Shifts coronally with age
C. Constant throughout the life
D. None of the above
✅ The correct answer is option C. Constant throughout the life.
339. A suitable fixative for a routine biopsy specimen is_____________?
A. 10% formalin
B. 40% formalin
C. 20% formalin
D. 10% alcohol
✅ The correct answer is option A. 10% formalin.
340. All of the following cells of periodontal ligament are of mesenchymal origin except______________?
A. Fibroblasts
B. Multi totipotent cells
C. Cementoblasts
D. Cell rests of malassez
✅ The correct answer is option D. Cell rests of malassez.