Part 8: Miscellaneous & Integrated NEET-level Practice Questions
Part 8 (25 MCQs) on Miscellaneous & Integrated NEET-level Practice Questions for Chapter 20: Locomotion and Movement (NCERT Class 11 + NEET UG prep).
Part 8: Miscellaneous & Integrated NEET-level Practice Questions
Q1. The functional unit of a skeletal muscle is:
a) Myofibril
b) Sarcomere
c) Sarcoplasm
d) Sarcolemma
Answer: b) Sarcomere
Explanation:
- ✅ (b) Sarcomere = Z line to Z line, contractile unit.
Q2. The total number of bones in human skull is:
a) 18
b) 20
c) 22
d) 24
Answer: c) 22
Explanation:
- ✅ (c) Skull = 22 bones (8 cranial + 14 facial).
Q3. Which band of sarcomere does not change during contraction?
a) I band
b) H zone
c) A band
d) Z line
Answer: c) A band
Explanation:
- ✅ (c) A band = constant length (thick filament length).
Q4. Which joint allows nodding of the head?
a) Pivot joint
b) Saddle joint
c) Hinge joint
d) Ball-and-socket
Answer: a) Pivot joint
Explanation:
- ✅ (a) Atlas–axis joint = pivot → nodding/rotation.
Q5. The largest sesamoid bone in the human body is:
a) Stapes
b) Patella
c) Clavicle
d) Scapula
Answer: b) Patella
Explanation:
- ✅ (b) Patella = sesamoid bone in knee joint.
Q6. Which of the following is NOT a synovial joint?
a) Knee
b) Elbow
c) Hip
d) Skull suture
Answer: d) Skull suture
Explanation:
- ✅ (d) Skull sutures = fibrous joints, immovable.
Q7. Which type of muscle fiber is rich in myoglobin and mitochondria?
a) White fibers
b) Red fibers
c) Fast-twitch fibers
d) None
Answer: b) Red fibers
Explanation:
- ✅ (b) Red fibers (slow-twitch) → high endurance.
Q8. The neurotransmitter at neuromuscular junction is:
a) Dopamine
b) Acetylcholine
c) Noradrenaline
d) Serotonin
Answer: b) Acetylcholine
Explanation:
- ✅ (b) ACh triggers muscle contraction.
Q9. Which disorder is characterized by brittle bones due to low bone density?
a) Rickets
b) Osteoporosis
c) Gout
d) Arthritis
Answer: b) Osteoporosis
Explanation:
- ✅ (b) Bone density loss → fragile bones.
Q10. The thumb joint is:
a) Ball-and-socket
b) Saddle
c) Pivot
d) Hinge
Answer: b) Saddle
Explanation:
- ✅ (b) Thumb base = saddle joint.
Q11. Which bones form the pectoral girdle?
a) Ilium and femur
b) Scapula and clavicle
c) Sternum and ribs
d) Humerus and scapula
Answer: b) Scapula and clavicle
Explanation:
- ✅ (b) Pectoral girdle = scapula + clavicle.
Q12. The longest bone in the human body is:
a) Humerus
b) Tibia
c) Femur
d) Radius
Answer: c) Femur
Explanation:
- ✅ (c) Femur = longest, strongest bone.
Q13. Which of the following is an example of hinge joint?
a) Hip
b) Knee
c) Shoulder
d) Atlas-axis
Answer: b) Knee
Explanation:
- ✅ (b) Knee → hinge joint.
Q14. Which mineral is most abundant in bone matrix?
a) Sodium phosphate
b) Calcium phosphate
c) Calcium carbonate
d) Potassium chloride
Answer: b) Calcium phosphate
Explanation:
- ✅ (b) Hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂) → bone hardness.
Q15. The smallest bone in the human body is:
a) Stapes
b) Incus
c) Malleus
d) Fibula
Answer: a) Stapes
Explanation:
- ✅ (a) Stapes (middle ear ossicle).
Q16. Which of the following joints is biaxial?
a) Knee
b) Shoulder
c) Saddle
d) Hip
Answer: c) Saddle
Explanation:
- ✅ (c) Saddle → movement in two planes (biaxial).
Q17. Which muscle type shows intercalated discs?
a) Skeletal
b) Cardiac
c) Smooth
d) Both skeletal and cardiac
Answer: b) Cardiac
Explanation:
- ✅ (b) Intercalated discs = unique to cardiac muscle.
Q18. Which vitamin deficiency causes rickets?
a) Vitamin A
b) Vitamin B12
c) Vitamin C
d) Vitamin D
Answer: d) Vitamin D
Explanation:
- ✅ (d) Vitamin D deficiency → weak, deformed bones.
Q19. Which enzyme activity is present in myosin head?
a) ATPase
b) Kinase
c) Ligase
d) Hydrolase
Answer: a) ATPase
Explanation:
- ✅ (a) ATPase hydrolyzes ATP → contraction energy.
Q20. The number of true ribs in humans is:
a) 10
b) 7
c) 8
d) 12
Answer: b) 7
Explanation:
- ✅ (b) First 7 pairs = true ribs.
Q21. The vertebral column protects:
a) Brain
b) Heart
c) Spinal cord
d) Lungs
Answer: c) Spinal cord
Explanation:
- ✅ (c) Vertebral column = spinal cord protection.
Q22. Which condition is due to autoimmune inflammation of joints?
a) Osteoporosis
b) Rheumatoid arthritis
c) Gout
d) Muscular dystrophy
Answer: b) Rheumatoid arthritis
Explanation:
- ✅ (b) Autoimmune → joint inflammation.
Q23. The first cervical vertebra is called:
a) Atlas
b) Axis
c) Sacrum
d) Coccyx
Answer: a) Atlas
Explanation:
- ✅ (a) Atlas (C1) → supports skull.
Q24. The second cervical vertebra is called:
a) Atlas
b) Axis
c) Sacrum
d) Coccyx
Answer: b) Axis
Explanation:
- ✅ (b) Axis (C2) → odontoid process → head rotation.
Q25. Which protein masks actin binding sites in a relaxed muscle?
a) Troponin
b) Tropomyosin
c) Myosin
d) Titin
Answer: b) Tropomyosin
Explanation:
- ✅ (b) Tropomyosin covers actin binding sites; troponin regulates.
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