This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 20 Locomotion And Movement – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 20 Locomotion And Movement Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Number of bones in human axial skeleton is- A) 80. B) 106. C) 206. D) None. Show Answer Correct Answer: A) 80. 2. Name the ion responsible for unmasking of active site for myosin for cross bridge activity during muscle contraction. A) Calcium. B) Magnesium. C) Sodium. D) Potassium. Show Answer Correct Answer: A) Calcium. 3. Read the statements given below w.r.t vertebral column in human beings and select the correct option. A) Neural canal passes through the spinal cord. B) Number of cervical vertebrae is 8 in all the members of class Mammalia including human beings. C) The vertebral column is the point of attachment for the ribs and musculature of the back. D) The vertebral column is a series of 26 vertebrae placed dorso-laterally. Show Answer Correct Answer: C) The vertebral column is the point of attachment for the ribs and musculature of the back. 4. How many ribs are present in the human body? A) 12. B) 24. C) 13. D) 15. Show Answer Correct Answer: B) 24. 5. In human arm, we have seen how the biceps contracts to bend the elbow, while triceps relaxes. This action is called ..... Pada lengan manusia, didapati biseps mengecut untuk membengkokkan lengan, manakala triseps mengendur. Tindakan ini dinamakan ..... A) Agonist / agonis. B) Antagonist / antagonis. C) Antagonistic / antagonistik. D) Prime mover / penggerak utama. Show Answer Correct Answer: C) Antagonistic / antagonistik. 6. An individual sarcomere consist of- A) A stack of actin fibres. B) A stack of myosin units. C) Overlapping actin and myosin. D) Overlapping myosin and membrane. Show Answer Correct Answer: C) Overlapping actin and myosin. 7. Myotome muscles are ..... shaped muscle segment found on both sides of fish spine. A) Z. B) W. C) Y. D) H. Show Answer Correct Answer: B) W. 8. When a skeletal muscle shortens during contraction which of these statements is false? A) The I-band shortens. B) The A-band shortens. C) The H-zone becomes narrow. D) The sarcomeres shorten. Show Answer Correct Answer: B) The A-band shortens. 9. By which structure complete pelvic girdle is formed? A) Two Ilium. B) Ischium. C) Two Coxal bone. D) Acetabulum. Show Answer Correct Answer: C) Two Coxal bone. 10. What is the role of the Z line in a sarcomere? A) To facilitate contraction. B) To store calcium. C) To anchor thin filaments. D) To anchor thick filaments. Show Answer Correct Answer: C) To anchor thin filaments. 11. Components of thin filament of a sarcomere are: A) Myosin, troponin. B) LMM, HMM. C) Actin, troponin, tropomyosin. D) Actin, Ca+. Show Answer Correct Answer: C) Actin, troponin, tropomyosin. 12. Which type of joint connects the skull bones? A) Hinges. B) Pivot. C) Ball-and-socket. D) Sutures. Show Answer Correct Answer: D) Sutures. 13. Deposition of uric-acid crystals with in the synovial joint causes:- A) Gout. B) Paralysis. C) Osteoarthritis. D) Rheumatoid arthritis. Show Answer Correct Answer: A) Gout. 14. A 7 year old boy is suffering from an auto immune disorder affecting neuromuscular junction leading to fatigue, weakness and paralysis of skeletal muscles. Select the correct answer for the given diagnosis. A) Tetany. B) Muscular dystrophy. C) Myasthenia gravis. D) Arthritis. Show Answer Correct Answer: C) Myasthenia gravis. 15. . Locomotion and capture of prey in Hydra occurs with the help of A) Cilia. B) Flagella. C) Tentacles. D) Pseudopodia. Show Answer Correct Answer: C) Tentacles. 16. The number of cervical vertebrae in camels is A) Same as that of rabbit. B) Same as in frog. C) Less than that of giraffe. D) More than thatvof horse. Show Answer Correct Answer: A) Same as that of rabbit. 17. Shape of the bone present at the base of buccal cavity is A) J-shaped. B) U-shaped. C) L-shaped. D) S-shaped. Show Answer Correct Answer: B) U-shaped. 18. How many bones are in the human hand? A) 27. B) 24. C) 30. D) 32. Show Answer Correct Answer: A) 27. 19. A) All locomotions are movements, but all movements are not locomotionB) All involuntary muscle fibres are smooth but all smooth fibres are not involuntary A) Both are correct. B) Both incorrect. C) Only A is incorrect. D) Only B is incorrect. Show Answer Correct Answer: D) Only B is incorrect. 20. Assertion-Calcium ion is responsible for muscle contraction.Reason-Binding of calcium with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true and R is not the correct explanation of A. C) Only A is correct only. D) Only R is correct only. Show Answer Correct Answer: A) Both A and R are true and R is the correct explanation of A. 21. Dark bands are A) A-band. B) B-band. C) I-band. D) Z-line. Show Answer Correct Answer: A) A-band. 22. Components of Actin filament of a sarcomere are: A) Myosin & Troponin. B) Troponin, Actin, L.M.M. C) Actin & Myosin. D) Actin, troponin & Tropomyosin. Show Answer Correct Answer: D) Actin, troponin & Tropomyosin. 23. What is the primary function of synovial fluid? A) To lubricate and reduce friction in joints. B) To absorb shock in the joints. C) To facilitate bone growth in joints. D) To provide nutrients to cartilage. Show Answer Correct Answer: A) To lubricate and reduce friction in joints. 24. The component of a muscle fibre known as sarcolemma functions as A) A contractile myofilament. B) A chemical at the synapse. C) A cross bridge unit on the myosin. D) A plasma membrane covering each cell. Show Answer Correct Answer: D) A plasma membrane covering each cell. 25. Contractile fibrils of muscles are called- A) Neurofibrils. B) Collagen fibres. C) Myofibrils. D) Yellow fibres. Show Answer Correct Answer: C) Myofibrils. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 20 Locomotion And Movement Quiz 1Class 11 Biology Chapter 20 Locomotion And Movement Quiz 2Class 11 Biology Chapter 20 Locomotion And Movement Quiz 3Class 11 Biology Chapter 20 Locomotion And Movement Quiz 4Class 11 Biology Chapter 20 Locomotion And Movement Quiz 5Class 11 Biology Chapter 20 Locomotion And Movement Quiz 6Class 11 Biology Chapter 20 Locomotion And Movement Quiz 7Class 11 Biology Chapter 20 Locomotion And Movement Quiz 8Class 11 Biology Chapter 20 Locomotion And Movement Quiz 10Class 11 Biology Chapter 20 Locomotion And Movement Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books