NEET Biology Locomotion and Movement MCQs Set 17

Multiple Choice Questions (MCQs) for NEET Biology: Locomotion and Movement

Review structured MCQ sets for NEET Biology Locomotion and Movement. Built according to official NEET guidelines, these downloadable questions support daily revision and core concept reinforcement.

Practice Locomotion and Movement MCQs for NEET Biology

Access the complete set of multiple-choice questions for Locomotion and Movement below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official NEET textbooks.

Multiple Choice Questions

Question 1: Consider four statements: (A) Each organised skeletal muscle is made of a number of muscle bundles or fasciculi. (B) Each muscle fibre has many parallelly arranged myofibrils. (C) Each myofibril contains many serially arranged units called sarcomeres. (D) Each sarcomere has a central A-band and two half I-bands. Which option includes all the correct ones?
(a) Statements B, C and D
(b) Statements A and B
(c) Statements C and D
(d) Statements A, B, C and D
Show Answer & Explanation

Answer: (d) Statements A, B, C and D

Explanation:
1. All four statements describe the structure of skeletal muscle correctly.

Teacher's Note:
1. Muscle is made of fasciculi, fasciculi of fibres, fibres of myofibrils, and myofibrils of sarcomeres.

Question 2: Which of the following structures is correctly organised from large to small?
(a) Muscle, muscle fibre, myofibril, sarcomere, filaments
(b) Muscle, muscle fibre, sarcomere, filaments, myofibril
(c) Muscle, filaments, myofibrils, sarcomere, muscle fibre
(d) Filaments, sarcomere, myofibril, muscle fibre, muscle
Show Answer & Explanation

Answer: (a) Muscle, muscle fibre, myofibril, sarcomere, filaments

Explanation:
1. A muscle has muscle fibres, each fibre has myofibrils, each myofibril has sarcomeres, and each sarcomere has actin and myosin filaments.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Question 3: Which of the following statements are correct? (i) Muscle contraction is initiated by a signal sent by a motor neuron of the CNS. (ii) During muscle contraction the isotropic band gets elongated. (iii) The dark band contains only myosin filaments. (iv) A motor neuron along with the muscle fibres connected to it constitutes a motor unit.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)
Show Answer & Explanation

Answer: (d) (i) and (iv)

Explanation:
1. A signal from the CNS motor neuron starts contraction, and a motor neuron with the fibres it supplies forms a motor unit.

Teacher's Note:
1. The I band (isotropic) shortens in contraction, and the dark A band has both actin and myosin.

Question 4: In the alimentary canal and reproductive tract, which type of muscles is present?
(a) Striated, involuntary
(b) Striated, voluntary
(c) Unstriated, voluntary
(d) Unstriated, involuntary
Show Answer & Explanation

Answer: (d) Unstriated, involuntary

Explanation:
1. The walls of hollow visceral organs have smooth (unstriated) muscle, which is not under voluntary control.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Question 5: During muscle contraction in humans:
(a) Sarcomere does not shorten
(b) A-band remains the same
(c) A, H and I bands shorten
(d) Actin filaments' length shortens
Show Answer & Explanation

Answer: (b) A-band remains the same

Explanation:
1. In the sliding filament theory, actin filaments slide over myosin and their lengths do not change.

Teacher's Note:
1. The A band stays the same, while the I band and H zone shorten and the sarcomere shortens.

Question 6: The myosin binding site is present on:
(a) Actin protein
(b) Myosin protein
(c) Tropomyosin protein
(d) Troponin protein
Show Answer & Explanation

Answer: (a) Actin protein

Explanation:
1. The active sites for myosin to bind are present on the actin filament and are masked by tropomyosin at rest.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Question 7: Arrange the events of muscle contraction in sequence: (i) generate an action potential in the sarcolemma (ii) form a cross bridge (iii) release a neurotransmitter (acetylcholine) (iv) release of calcium ions (v) pull the attached actin filaments towards the centre of A band (vi) removal of the masking of active sites for myosin.
(a) i, ii, iii, iv, v, vi
(b) iii, iv, i, ii, vi, v
(c) iii, i, ii, iv, v, vi
(d) iii, i, iv, vi, ii, v
Show Answer & Explanation

Answer: (d) iii, i, iv, vi, ii, v

Explanation:
1. Acetylcholine release (iii) causes an action potential in the sarcolemma (i), which releases Ca2+ (iv) that unmasks the active sites (vi).

Teacher's Note:
1. Then cross bridges form (ii) and the actin filaments are pulled inwards (v).

Question 8: In the resting state, a subunit of troponin masks:
(a) Active binding sites for actin on the myosin filaments
(b) Active binding sites for myosin on the myosin filaments
(c) Active binding sites for myosin on the actin filaments
(d) Active binding sites for actin on the actin filaments
Show Answer & Explanation

Answer: (c) Active binding sites for myosin on the actin filaments

Explanation:
1. At rest, troponin and tropomyosin cover the myosin binding sites on actin, and Ca2+ uncovers them.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Question 9: How many points are correct about visceral muscles? (i) located in the inner walls of hollow visceral organs (ii) they do not show striations (iii) primarily involved in locomotory actions and changes of body postures (iv) their activities are not under the voluntary control of the nervous system (v) contraction slow but for a long period (vi) muscle fibre is short, spindle shaped, branched, uninucleated
(a) Two
(b) Three
(c) Four
(d) Five
Show Answer & Explanation

Answer: (c) Four

Explanation:
1. Points i, ii, iv and v are correct.

Teacher's Note:
1. Locomotion is a function of skeletal muscle, and visceral muscle fibres are unbranched.

Question 10: Actin binding sites are located in:
(a) Troponin
(b) Tropomyosin
(c) Meromyosin
(d) Both 1 and 2
Show Answer & Explanation

Answer: (c) Meromyosin

Explanation:
1. The globular head of meromyosin (the heavy meromyosin) has the actin binding site and the ATP binding site.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Question 11: Repeated activation of the muscles can lead to the accumulation of lactic acid due to:
(a) Aerobic breakdown of galactose
(b) Anaerobic breakdown of glycogen
(c) Aerobic breakdown of glycogen
(d) Anaerobic breakdown of pyruvic acid
Show Answer & Explanation

Answer: (b) Anaerobic breakdown of glycogen

Explanation:
1. With repeated activation the oxygen supply is low, so glycogen is broken down anaerobically to lactic acid, which causes fatigue.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Question 12: Statements about red muscle fibres: (A) they contain the O2 storing pigment haemoglobin (B) they contain plenty of mitochondria (C) they are called anaerobic muscles (D) they show slow contraction. Choose the correct statements.
(a) A and B
(b) B and C
(c) B and D
(d) D and A
Show Answer & Explanation

Answer: (c) B and D

Explanation:
1. Red fibres have a lot of mitochondria and show slow contraction, and they work aerobically.

Teacher's Note:
1. Their pigment is myoglobin, and not haemoglobin.

Question 13: Which of the following is a correct match of bones?
(a) Carpals, wrist, 12
(b) Metacarpals, palm, 7
(c) Phalanges, digits, 14
(d) Tarsals, ankle, 8
Show Answer & Explanation

Answer: (c) Phalanges, digits, 14

Explanation:
1. Each hand has 14 phalanges.

Teacher's Note:
1. Carpals number 8, metacarpals 5 and tarsals 7.

Question 14: Statements: A. The vertebral column is formed by 26 serially arranged units called vertebrae and is ventrally placed. B. It extends from the base of the skull and constitutes the main frame work of the trunk. C. Each vertebra has a central hollow portion (neural canal) through which the spinal cord passes. D. The first vertebra is the axis and it articulates with the occipital condyles. How many are correct?
(a) Four
(b) Three
(c) Two
(d) One
Show Answer & Explanation

Answer: (c) Two

Explanation:
1. Statements B and C are correct.

Teacher's Note:
1. The vertebral column is dorsally placed, and the first vertebra is the atlas.

Question 15: The age related disorder characterised by decreased bone mass and increased chances of fractures is:
(a) Gout
(b) Arthritis
(c) Osteoporosis
(d) Both 1 and 2
Show Answer & Explanation

Answer: (c) Osteoporosis

Explanation:
1. Osteoporosis causes bones to become weak and brittle, mostly in old age, and low oestrogen is a factor.

Teacher's Note:
1. Revise this point from the NCERT chapter and link it with the related terms.

Free study material for Biology

Locomotion and Movement Objective Questions & Solutions for NEET Biology

NEET Biology Locomotion and Movement Objective Test Questions

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