Chapter 20: Locomotion and Movement – MCQs with Answers & Explanations

CBSE Class 11 Biology MCQs – Locomotion and Movement (NCERT-Based)

Course & Examination Details

• Course: CBSE Class 11 Biology
• Prescribed By: Central Board of Secondary Education
• Based On: NCERT
• Unit: Unit V – Human Physiology
• Chapter: Chapter 20 – Locomotion and Movement
• Question Type: Multiple Choice Questions (MCQs)
• Exam Relevance: CBSE Class 11 Annual Exam, Unit Tests, Periodic Assessments

Section A: Skeletal System (MCQ 1–18)

1. Movement of body parts without change in place is called

A. Locomotion
B. Muscular action
C. Movement
D. Posture

Correct Answer: C
Explanation:
Movement refers to change in position of body parts without displacement of the whole body.

2. Locomotion differs from movement because locomotion involves

A. Muscles only
B. Whole body displacement
C. Involuntary action
D. Internal organs

Correct Answer: B
Explanation:
Locomotion is movement of the entire body from one place to another.

3. Total number of bones in an adult human is

A. 208
B. 206
C. 210
D. 212

Correct Answer: B
Explanation:
An adult human skeleton consists of 206 bones.

4. The axial skeleton consists of

A. 126 bones
B. 206 bones
C. 80 bones
D. 60 bones

Correct Answer: C
Explanation:
The axial skeleton has 80 bones forming the central axis.

5. Which of the following is NOT part of axial skeleton?

A. Skull
B. Vertebral column
C. Rib cage
D. Pelvic girdle

Correct Answer: D
Explanation:
Pelvic girdle belongs to appendicular skeleton.

6. Number of bones in the human skull is

A. 20
B. 22
C. 24
D. 26

Correct Answer: B
Explanation:
The skull consists of 22 bones.

7. The vertebral column in humans consists of

A. 33 vertebrae
B. 26 vertebrae
C. 24 vertebrae
D. 30 vertebrae

Correct Answer: B
Explanation:
Humans have 26 vertebrae including fused sacral and coccygeal bones.

8. Rib cage helps in

A. Protection only
B. Respiration only
C. Movement only
D. Protection and respiration

Correct Answer: D
Explanation:
The rib cage protects organs and aids breathing.

9. The appendicular skeleton mainly helps in

A. Protection
B. Support
C. Locomotion
D. Respiration

Correct Answer: C
Explanation:
Appendicular skeleton enables movement and locomotion.

10. Upper limbs are attached to axial skeleton by

A. Pelvic girdle
B. Pectoral girdle
C. Vertebral column
D. Sternum

Correct Answer: B
Explanation:
Pectoral girdle attaches upper limbs to axial skeleton.

11. Which joint allows movement in all directions?

A. Hinge joint
B. Pivot joint
C. Gliding joint
D. Ball and socket joint

Correct Answer: D
Explanation:
Ball and socket joint allows maximum flexibility.

12. Elbow joint is an example of

A. Pivot joint
B. Gliding joint
C. Hinge joint
D. Saddle joint

Correct Answer: C
Explanation:
Elbow permits movement in one plane like a hinge.

13. Joint between atlas and axis is

A. Hinge joint
B. Pivot joint
C. Gliding joint
D. Ball and socket joint

Correct Answer: B
Explanation:
Pivot joint allows rotation of head.

14. Synovial fluid is found in

A. Fibrous joints
B. Cartilaginous joints
C. Synovial joints
D. Immovable joints

Correct Answer: C
Explanation:
Synovial joints contain synovial fluid for lubrication.

15. Which disorder involves inflammation of joints?

A. Osteoporosis
B. Arthritis
C. Muscular dystrophy
D. Tetany

Correct Answer: B
Explanation:
Arthritis causes joint inflammation and pain.

16. Reduction in bone density is called

A. Osteomalacia
B. Arthritis
C. Osteoporosis
D. Tetany

Correct Answer: C
Explanation:
Osteoporosis weakens bones due to reduced density.

17. Ligaments connect

A. Muscle to bone
B. Bone to bone
C. Muscle to muscle
D. Bone to cartilage

Correct Answer: B
Explanation:
Ligaments hold bones together at joints.

18. Cartilage is mainly found in

A. Long bones
B. Joints and nose
C. Skull bones
D. Teeth

Correct Answer: B
Explanation:
Cartilage provides flexibility and cushioning at joints.

Section B: Muscular System (MCQ 19–35)

19. Which muscles are voluntary?

A. Smooth
B. Cardiac
C. Skeletal
D. Visceral

Correct Answer: C
Explanation:
Skeletal muscles are under conscious control.

20. Smooth muscles are found in

A. Limbs
B. Heart
C. Intestine
D. Tongue

Correct Answer: C
Explanation:
Smooth muscles line internal organs.

21. Cardiac muscles are

A. Non-striated and voluntary
B. Striated and involuntary
C. Non-striated and involuntary
D. Striated and voluntary

Correct Answer: B
Explanation:
Cardiac muscles show striations but work involuntarily.

22. Muscle fibre membrane is called

A. Sarcoplasm
B. Sarcolemma
C. Myofibril
D. Sarcomere

Correct Answer: B
Explanation:
Sarcolemma is the plasma membrane of muscle fibre.

23. Cytoplasm of muscle fibre is

A. Myosin
B. Actin
C. Sarcoplasm
D. Sarcomere

Correct Answer: C
Explanation:
Sarcoplasm is the cytoplasm of muscle fibre.

24. Functional unit of myofibril is

A. Myosin
B. Actin
C. Sarcomere
D. Z-line

Correct Answer: C
Explanation:
Sarcomere is responsible for contraction.

25. Thin filaments of muscle are made of

A. Myosin
B. Actin
C. Keratin
D. Troponin

Correct Answer: B
Explanation:
Actin forms thin filaments.

26. Thick filaments are composed of

A. Actin
B. Troponin
C. Myosin
D. Tropomyosin

Correct Answer: C
Explanation:
Myosin forms thick filaments.

27. Dark band of sarcomere is

A. I-band
B. H-zone
C. Z-line
D. A-band

Correct Answer: D
Explanation:
A-band appears dark due to myosin.

28. Light band of sarcomere is

A. A-band
B. I-band
C. H-zone
D. Z-line

Correct Answer: B
Explanation:
I-band contains actin only.

29. Sarcoplasmic reticulum stores

A. ATP
B. Calcium ions
C. Sodium ions
D. Potassium ions

Correct Answer: B
Explanation:
Calcium ions initiate contraction.

30. Neuromuscular junction releases

A. Dopamine
B. Noradrenaline
C. Acetylcholine
D. Serotonin

Correct Answer: C
Explanation:
Acetylcholine transmits nerve impulse to muscle.

31. Muscles working in opposite directions are

A. Synergistic
B. Agonistic
C. Antagonistic
D. Voluntary

Correct Answer: C
Explanation:
Antagonistic muscles ensure smooth movement.

32. Continuous partial contraction of muscles is

A. Tetany
B. Muscle tone
C. Rigor mortis
D. Cramp

Correct Answer: B
Explanation:
Muscle tone maintains posture.

33. Genetic disorder causing muscle degeneration is

A. Arthritis
B. Tetany
C. Muscular dystrophy
D. Myasthenia gravis

Correct Answer: C
Explanation:
Muscular dystrophy leads to progressive muscle weakness.

34. Autoimmune disorder affecting neuromuscular junction is

A. Arthritis
B. Tetany
C. Osteoporosis
D. Myasthenia gravis

Correct Answer: D
Explanation:
Myasthenia gravis weakens skeletal muscles.

35. Smooth muscles lack

A. Nuclei
B. Sarcoplasm
C. Striations
D. Contractility

Correct Answer: C
Explanation:
Smooth muscles are non-striated.

Section C: Muscle Contraction (MCQ 36–50)

36. Muscle contraction is explained by

A. Lock and key theory
B. Sliding filament theory
C. Fluid mosaic model
D. Chemiosmosis

Correct Answer: B
Explanation:
Sliding filament theory explains contraction.

37. Sliding filament theory was proposed by

A. Watson and Crick
B. Huxley and Hanson
C. Darwin
D. Mendel

Correct Answer: B
Explanation:
Huxley and Hanson proposed the theory.

38. During contraction, sarcomere

A. Lengthens
B. Shortens
C. Remains same
D. Disappears

Correct Answer: B
Explanation:
Sarcomere shortens during contraction.

39. Length of which band remains constant during contraction?

A. I-band
B. H-zone
C. A-band
D. Z-line

Correct Answer: C
Explanation:
A-band length remains unchanged.

40. Cross-bridge is formed between

A. Actin–actin
B. Myosin–myosin
C. Actin–myosin
D. Troponin–tropomyosin

Correct Answer: C
Explanation:
Myosin head binds actin forming cross-bridge.

41. ATP is required for

A. Cross-bridge formation only
B. Cross-bridge detachment
C. Calcium release
D. Sarcomere shortening

Correct Answer: B
Explanation:
ATP helps detach myosin from actin.

42. Lack of ATP after death causes

A. Tetany
B. Arthritis
C. Rigor mortis
D. Cramps

Correct Answer: C
Explanation:
Absence of ATP leads to muscle stiffness.

43. Calcium binds to

A. Myosin
B. Actin
C. Troponin
D. Tropomyosin

Correct Answer: C
Explanation:
Calcium binding exposes actin sites.

44. Muscle relaxation occurs when

A. ATP increases
B. Calcium enters sarcoplasm
C. Calcium is pumped back
D. Myosin binds actin

Correct Answer: C
Explanation:
Removal of calcium leads to relaxation.

45. Sustained contraction due to low calcium is

A. Tetany
B. Rigor mortis
C. Cramp
D. Arthritis

Correct Answer: A
Explanation:
Tetany occurs due to hypocalcemia.

46. Bending of arm involves contraction of

A. Triceps
B. Deltoid
C. Biceps
D. Gluteus

Correct Answer: C
Explanation:
Biceps contracts to bend arm.

47. Holding a weight without movement is

A. Isotonic contraction
B. Isometric contraction
C. Tetany
D. Relaxation

Correct Answer: B
Explanation:
Isometric contraction involves no length change.

48. Shortening of muscle with movement is

A. Isometric
B. Isotonic
C. Passive
D. Relaxation

Correct Answer: B
Explanation:
Isotonic contraction causes movement.

49. Energy for contraction is supplied by

A. ADP
B. AMP
C. ATP
D. NADH

Correct Answer: C
Explanation:
ATP is the immediate energy source.

50. Locomotion in humans is mainly due to

A. Smooth muscles
B. Cardiac muscles
C. Skeletal muscles
D. Cartilage

Correct Answer: C
Explanation:
Skeletal muscles bring about locomotion.

NCERT & CBSE Compliance Note

✔ Strictly based on NCERT Class 11 Biology
✔ Concept-clearing explanations included
✔ Fully aligned with CBSE exam pattern
✔ Ideal for revision, practice, and assessments

🎯 Targeting Exams

This MCQ set is useful for preparation of:

• CBSE Class 11 Biology Annual Examination

• CBSE Unit Tests & Periodic Assessments

• NEET (UG) – Human Physiology Basics

• CUET (UG) – Biology Section

• State Board Class 11 Biology Exams

• Medical & Paramedical Entrance Foundation Courses

🔑 Related & Semantic Keyphrases

• Locomotion and Movement MCQs Class 11

• CBSE Class 11 Biology Chapter 20 MCQs

• NCERT Locomotion and Movement MCQs

• Skeletal System MCQs Class 11

• Muscular System MCQs Class 11 Biology

• Muscle Contraction MCQs Class 11

• Human Locomotion MCQs NCERT

• Class 11 Biology Objective Questions Human Physiology