Q1. Which of the following bones is incorrectly matched with its classification?A. Femur - Long boneB. Humerus - Short boneC. Sternum - Flat boneD. Vertebra - Irregular bone
Q2. Which structure in muscles stores calcium ions required for contraction?A. SarcolemmaB. T-tubulesC. Sarcoplasmic reticulumD. Myosin filaments
Q3. Which protein helps in the regulation of muscle contraction by binding calcium?A. MyosinB. ActinC. TroponinD. Tropomyosin
Q5. Which of the following statements about muscle contraction is correct?A. ATP is not required for contraction.B. Myosin heads form cross-bridges with actin filaments.C. Calcium ions play no role in muscle contraction.D. Actin filaments shorten during contraction.
Q6. Which joint allows rotation of the head?A. Ball and socket jointB. Hinge jointC. Pivot jointD. Gliding joint
Q7. Which type of bone cell is responsible for bone resorption?A. OsteoblastsB. OsteoclastsC. OsteocytesD. Chondrocytes
Q8. Which of the following bones belongs to the axial skeleton?A. FemurB. HumerusC. SternumD. Scapula
Q9. Which part of the vertebral column bears the most weight?A. Cervical vertebraeB. Thoracic vertebraeC. Lumbar vertebraeD. Sacral vertebrae
Q10. Which of the following statements about actin filaments is incorrect?A. Actin filaments are composed of 'F' actin polymers.B. Troponin is distributed at regular intervals on actin filaments.C. Myosin binds directly to tropomyosin during contraction.D. Actin filaments are thinner compared to myosin filaments.