MDS PREP
What is the role of troponin in skeletal muscle contraction?
1) It initiates contraction by binding to calcium ions
2) It is essential for the sliding of actin and myosin filaments
3) It is involved in the excitation-contraction coupling process
4) It is not present in skeletal muscles and plays no direct role in their contraction
Troponin is a protein complex found in cardiac and smooth muscles, not in skeletal muscles. In skeletal muscles, it is the regulatory proteins tropomyosin and the troponin complex that are crucial for excitation-contraction coupling.
Polycarboxylate cement powder contains all of the following, except
1. stannic oxide and stannous fluoride 2. magnesiumoxide
3. potash alum 4. polyacrylic acid
Dental Material
Answer: 3
Most susceptible to radiations are
1) Nucleic acids
2) Nerve cells
3) Muscle cells
4) Epithelial cells
Radiology
Answer: 1
Preparation of class I cavities for dental amalgam, direct filling gold or gold inlays have in common
1. Occlusally diverging facial and lingual walls
2. Occlusally diverging mesial and distal walls
3. Occlusally diverging facial and lingual walls
4. Occlusally diverging mesial and distal walls
Conservative Dentistry
Answer: 2
Resistance form in root canal refers to
1) Parallel walls of apical seat to preserve natural constriction
2) Tapering of funnel shaped canal walls
3) Shape of access cavity preparation
4) None of the above
Endodontics
Answer: 1
If the pulp of the single rooted canal is triangular in cross-section with the base of the triangle located facially and apex located lingually with the mesial arm longer than the distal, the tooth is most likely
1. Maxillary central incisor
2. Maxillary lateral incisor
3. Mandibular second premolar
4. Mandibular central incisor
Endodontics
Answer: 1
Kaussmaul"s breathing is due to presence of
1) Bicarbonate
2) H+ ions
3) Chloride ions
4) K+ ions
General Medicine
Answer: 2
Kaussmaul's breathing is due to the presence of H+ ions