Question: Collagen molecule exhibits all of the following features except_____________?

• 1. Triple pleated sheath
• 2. Mostly contains glycine residues
• 3. Exhibit cross striations at 64 μm
• 4. Intracellular in nature

Question: Which of the following is not the principle fibre group of the periodontal ligament___________?

• 1. Horizontal
• 2. Oblique
• 3. Alveolar crest
• 4. Transseplat

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

• 1. The number or organelles
• 2. Presence of actin fibres and shape change
• 3. size of the cells
• 4. Collagen fibre formation

Question: The component of future T.M.J shows development at _____________?

• 1. 6 weeks
• 2. 10 weeks
• 3. 18 weeks
• 4. 16 weeks

Question: Centre of the disc in TMJ is_____________?

• 1. Avascular
• 2. Devoid of nervous tissue
• 3. Avascular & deviod of nervous tissue
• 4. None of the above

Question: Narrowing of periodontal ligament in labially placed mandibular canine with age is due to_____________?

• 1. Due to deposition of cementum and bone
• 2. Down growths of gingival epithelium
• 3. Gingival cysts formed from cell rests
• 4. Reversal of function of horizontal and oblique fibres

Question: The main function of horizontal fibres of P.D ligament is____________?

• 1. Prevent extrusion
• 2. Prevent rotation
• 3. Maintains the mesiodistal width
• 4. All of the above

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

• 1. Dental pulp
• 2. Lamina propria
• 3. Odontogenic epithelium
• 4. Vestibular lamina

Question: The most abundant group of fibres in the PDL are_____________?

• 1. Trans-septal
• 2. Horizontal
• 3. Oblique
• 4. Apical

Question: True about osteoclasts_____________?

• 1. Monocytes are precursor cells of osteoclasts
• 2. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border
• 3. Contain lysosomes with acid phosphates
• 4. All of the above are true