737. Which of the following would you consider to be general properties of viruses______________?

by
A. New virus particle arises directly (by division) from preexisting viruses
B. Fall in to the general size range of 200-3000 angstrom unit
C. Contain equal proportions of protein, lipo polysaccharide and nucleic acids
D. Contain DNA but no RNA
✅ The correct answer is option Fall in to the general size range of 200-3000 angstrom unit.

711. The contact area on the distal side of a maxillary first premolar is located _____________?

by
A. Middle of the middle third with buccal embrasure wider than lingual
B. Middle of the middle third with lingual embrasure wider than buccal
C. Litter cervical to the junction of occlusal and middle third of the crown with wide occlusal embrasure
D. Cervical third with buccal embrasure wider than lingual embrasure
✅ The correct answer is option C. Litter cervical to the junction of occlusal and middle third of the crown with wide occlusal embrasure.