MCQ Questions Chapter 20 Locomotion and Movement Class 11 Biology

Please refer to MCQ Questions Chapter 20 Locomotion and Movement Class 11 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Biology issued for the current academic year. We have provided MCQ Questions for Class 11 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 20 Locomotion and Movement in Class 11 Biology provided below to get more marks in exams.

Chapter 20 Locomotion and Movement MCQ Questions

Please refer to the following Chapter 20 Locomotion and Movement MCQ Questions Class 11 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 20 Locomotion and Movement Class 11 Biology

Question. Which of the following animals is correctly matched with its types of skeleton ?
(a) Crab – Exoskeleton
(b) Earthworm – Exoskeleton
(c) Fly – Endoskeleton
(d) Dog – Exoskeleton

Question. Which state of a living muscle, are the following events associated ?
1. Ca⁺² released by sarcoplasmic reticulum
2. Actin complexes with myosin
3. ATPase is activated
4. Troponin binds Ca⁺²
(a) Relaxed state
(b) Muscle at the beginning of contraction
(c) Muscle in tetanus
(d) Muscle at the end of contraction

Question. A myofibril has the proteins-actin, myosin, tropomyosin and troponin. The ratio of actin : myosin is :
(a) 1 :2
(b) 2 : 1
(c) 2 : 5
(d) 5: 2

Question. Bone cells that disintegrate the bone matrix to release Ca⁺⁺ in blood in response to parathormone are
(a) Osteoblasts
(b) Osteoclasts
(c) Osteocytes
(d) All of these

Question. Rigor mortis (stiffness after death) occurs due to muscle contraction. However, it lasts for 24 hours and then disappears. This is because
(a) Ca²⁺ channels in the sarcoplasmic reticulum are closed after 24 hrs
(b) Contraction is an energy requiring process. Since ATP synthesis ceases after death, contraction also ceases
(c) Proteolytic enzymes from lysosomes digest the cross linkges between myosin and actin
(d) All of the above

Question. At times the ligaments are overstretched or torn. It is called
(a) Dislocation
(b) Fracture
(c) Sprain
(d) Tension

Question. Which of the following is not found in birds 
(a) Pectoral girdle
(b) Pelvic girdle
(c) Hind limb
(d) Fore limb

Question. Which one of the following is a sesamoid bone? 
(a) pelvis
(b) patella
(c) pterygoid
(d) pectoral girdle

Question. Bone marrow is absent in 
(a) reptilia
(b) amphibia
(c) fishes
(d) birds

Question. Elblow joint is an example of 
(a) Pivot joint
(b) Hinge joint
(c) Gliding joint
(d) Ball and socket joint

Question. Which one of the following is the correct matching of three items and their grouping category ? Items Groups 
(a) Malleus, incus, cochlea Ear ossicles
(b) Ilium, ischium, pubis Coxal bones of pelvic girdle
(c) Actin, myosin, rhodopsin Muscle proteins
(d) Cytosine, uracil, thiamine Pyrimidines

Question. Low Ca++ in the body fluid may be the cause of 
(a) Anaemia
(b) Angina pectoris
(c) Gout
(d) Tetany

Question. Select the correct statement regarding the specific disorder of muscular or skeletal system :
(a) Muscular dystrophy – age related shortening or muscles.
(b) Osteoporosis – decrease in bone mass and higher chance of fractures with advancing age.
(c) Myasthenia gravis – Auto immune disorder which inhibits sliding of myosin filaments
(d) Gout – inflammation of joints due to extra deposition of calcium.

Question. Which one is the most abundant protein in the animal world
(a) Trypsin
(b) Hemoglobin
(c) Collagen
(d) Insulin

Question. The muscle fatigue occurs due to accumulation of
(a) Pyruvic acid
(b) ATP
(c) Lactic acid
(d) Eroman CO²

Question. Intercostal muscles are found in
(a) Fingers
(b) Thoracic ribs
(c) Femur
(d) Radius-ulna

Question. The knee joint in between the thigh and lower leg is a
(a) Hinge joint
(b) Gliding joint
(c) Pivot joint
(d) Fixed joint

Question. Arytenoid cartilages are found in
(a) Hyoid
(b) Sternum
(c) Larynx
(d) Nose

Question. The cup-shaped structure of pelvic girdle, the acetabulum in man is formed by
(a) lium, ischium and pubis
(b) Ilium, ischium and cotyloid
(c) Ilium and ischium
(d) Ilium and cotyloid

Question. In man ribs are attached to
(a) Clavicle
(b) Ileum
(c) Sternum
(d) Scapula

Question. Hinge joint is present between
(a) Humerus and pectoral girdle
(b) Femur and acetabulum
(c) Humerus and radio-ulna
(d) Femur and pelvic girdle

Question. In man the nasal cavity is separated from the buccal cavity by a bone which is known as
(a) Palate complex
(b) Lingual bone
(c) Soft palate
(d) Hyoid apparatus

Question. Malleus is a part of
(a) Fore limbs of vertebrates
(b) Reproductive organs of cockroach
(c) Auditory ossicles of middle ear of rabbit
(d) Skull of frog

Question. Humerus bone is situated in
(a) Thigh
(b) Lower arm
(c) Upper arm
(d) Shank

Question. Which of the following movements in man are directly concerned with locomotion 
(a) Bending of arm at elbow
(b) Rotation of head of femur in acetabulum
(c) Peristalic movements
(d) Contraction of the heart

Question. An example of unstriated muscles which are entirely involuntary are located
(a) In the diaphragm
(b) In the eyelid
(c) At the pylorus
(d) At the base of external ear

Question. Which bone during its development is not a cartilage
(a) Malleus
(b) Humerus
(c) Incus
(d) Nasal

Question. In mammals, the largest vertebra is
(a) Cervical
(b) Lumbar
(c) Caudal
(d) Sacral

Question. Bone marrow is largely composed of 
(a) Periosteum and osteoblast
(b) Adipose tissue and blood vessels
(c) Yellow and elastic tissue
(d) Cartilage and elastic tissue

Question. Number of bones of face is
(a) 12
(b) 30
(c) 40
(d) 14

Question. Typically all mammals have seven cervical vertebrae except in
(a) Elephant
(b) Man
(c) Kangaroo
(d) Sea cow

Question. The opening at the base of the skull for the spinal cord is called
(a) Foramen Magnum
(b) Foramen of Monro
(c) Obturator foramen
(d) Foramen of Magendie

Question. The 8^th and 9^th ribs are known as false ribs because their external portions are attached to
(a) Xiphisternum
(b) Costa of 7^th rib
(c) They have no costa
(d) They are not true ribs

Question. Foramen Magnum is situated in
(a) Buccal cavity
(b) Base of skull
(c) Left auricle
(d) Vertebra

Question. Which one of the following component is the part of pectoral girdle
(a) Acetabulum
(b) Hilum
(c) Sternum
(d) Glenoid cavity

Question. What will happen if a bone is kept in 10% KOH solution for 3 days
(a) Remain unchanged
(b) Dissolved
(c) Become soft and elastic
(d) Break

Question. The total number of vertebrae in man is
(a) 30
(b) 31
(c) 32
(d) 33

Question. In mammals each half of pelvic girdle consists of 
(a) Ilium
(b) Ischium
(c) Pubis
(d) All the above

Question. Quadriceps and Gastrocnemius muscle lies in
(a) Hands
(b) Legs
(c) Shoulder
(d) Wrist

Question. Patella, the knee cap is the example of
(a) Cartilage gland
(b) Replacing bone
(c) Sesamoid bone
(d) None of the above

Question. Smallest muscle in the human body 
(a) Sartorius
(b) Spinal muscle
(c) Stapes
(d) Stapedius

Question. Largest smooth muscle present in
(a) Leg
(b) Thigh
(c) Uterus of pregnant woman
(d) Urethra

Sesamoid bone is derived from-

(a) Cartilage (b) Areolar tissue (c) Tendon (d) Ligament In each of the following questions a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Of the statements, mark the correct answer as
(a) If both assertion and resaon are true and reason is the correct explanation of assertion
(b) If both assertion and reason are true but reason is not the correct explanation of assertion
(c) If assertion is true but reason is false
(d) If both assertion and reason are false

Question. Assertion : Muscle twitch is related with tetanus.
Reason : Tetanus is caused by many nerve impulses at a time.

Question. Assertion : Ball and socket joints are the most mobile joints.
Reason: Synovial fluid is present here.

Question. Assertion : There are similarities between the locomotion of unicellular organisms and multicellular animal.
Reason: Ciliary, flagellar and amoeboid movement occur in unicellular organisms.

Question. Assertion : Biceps and triceps are called antagonistic muscles.
Reason : This is due to the fact that they contract and relax together.

Question. Assertion : Muscle contraction force increases with rise in strength of stimulus.
Reason: This is due to increased contraction of individual muscle fibres with increase in stimulus strength.

Question. Assertion : Old ladies are prone to osteoporesis.
Reason : Oestrogen also maintain calcium balance in the bones and blood.

Question. Assertion : Outermost layer of the bone is a fibrous connective tissue.
Reason : Matrix of bone is composed of protein ossein.

Question. Assertion : Ball and socket joints are the most mobile joints.
Reason : Synovial fluid is present here.

Question. Assertion : Arthritis or inflammation of a joint makes the joint painful.
Reason: Some toxic substances are deposited at the joint.