CBSE Class 11 Biology Locomotion and Movement Assignments

Question. Assertion :- All locomotions are movement but all movements are not locomotion.
Reason :- Such voluntory movements which result in a change of place or location are called locomotion.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Locomotion is generally for search of food, shelter, mate, suitable breeding grounds, favourable climatic conditions or to escape from enemies.
Reason :- Hydra can use its tentacle’s for capturing its prey and also use them for locomotion.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Amoeboid movement is effected by pseudopodia formed by the streaming of protoplasm.
Reason :- Cytoskeletal elements like microfilaments are involved in amoeboid movement.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- The coordinated movements of cilia in the trachea help us in removing dust particles.
Reason :- The coordinated movement of cilia is controled by neural system.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Passage of ova through the female reproductive tract is also fascilitated by the ciliary movement.
Reason :- The co-ordinated movement of cilia is required for movement of ova in female reproductive tract.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Locomotion requires a perfect coordinated activity of muscular, skeletal and neural system.
Reason :- Locomotion in skeletal is controlled by CNS voluntarily.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Skeletal muscle’s are voluntray in nature.
Reason :- Contraction of skelectal muscle is controlled by motor area of cerebral cortex.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Visceral muscles are also called smooth muscles.
Reason :- Their activities are not under the voluntary control of the nervous system.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Cardiac muscle are autonomous and involuntary in nature.
Reason :- The nervous system does not control their activities directly.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Cardiac muscles are structurally striped.
Reason :- Cardiac muscles are uni nucleated and branched.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- The dark band of muscles is also called ‘A’ or Anisotropic band.
Reason :- The dark band contains thick myosin filaments as well as thin actin filaments.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Each ‘F’ actin is a polymer of monomeric ‘G’-actin.
Reason :- ‘G’ actin is a globular protein or tertiary structure of protein.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- In the resting state a subunit of troponin masks the active binding site for myosin on the actin filaments.
Reason :- A complex protein troponin is distributed at regular intervals on the tropomyosin.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- The globular head of meromyosin act as ATPase enzyme.
Reason :- The head of meromyosin is a tertiary structure of protein.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- The calcium ions are essential for muscle contraction.
Reason :- Calcium ion are required for ATPase activities.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- The junction between a motor neuron and sarcolemma of muscle fibre is called the motor end plate.
Reason :- Muscles contraction is initiated by a singal sent by the central nervous system via motor neuron.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- A neural singnal reaching neuro muscular junction, stimulate release of neurotransmitter, which generates an action potential in the sarcolemma.
Reason :- Action potential spreads through the cardiac muscle fibre and increase the intra cellular \( Ca^{+2} \) level by influx of \( Ca^{+2} \) from ECF.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Muscle’s fatigue is caused by accumulation of lactic acid.
Reason :- Lactic acid is formed by anaerobic breakdown of glycogen.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- White muscle fibres are faster than red muscle fibre.
Reason :- The white muscle fibres depend on anaerobic process for energy.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- A-band contain both myosin and actin filaments.
Reason :- In a resting state, the edges of thin filaments on either side of the thickfilaments partialy overlap the free end of thick filament.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Locomotion is a voluntary movement.
Reason :- Cells of Human body exhibits amoeboid, ciliary and muscular movement.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Striated muscles are directly under the voluntary control of the nervous system.
Reason :- Striated muscles are primarily involved in locomotory actions and changes of body posture.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Fascicles are held together by a common collagenous connective tissue layer called fascia.
Reason :- Fascia is also referred as syncytium.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Striped muscle fibre is a syncytium as the sarcoplasm contains many nuclei.
Reason :- The sarcoplasmic reticulum of the striped muscle fiber is the store house of calcium ions.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Band form by only actin protein is called Anisotropic Band.
Reason :- Band form by myosin protein is called isotropic band.
(a) A
(b) B
(c) C
(d) D
Answer: D

Question. Assertion :- Sarcomere is the functional unit of contraction present between two successive ‘Z’ - Lines.
Reason :- Central part of myosin filament, not overlapped by actin filament is called ‘H’ - zone.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- The number of cervical vertebrae is almost seven in all mammals including humans.
Reason :- Sternum is a flat bone and located at the dorsal midline of the thorax.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- The \( 8^{th} \), \( 9^{th} \) & \( 10^{th} \) ribs joins with the \( 7^{th} \) rib with the help of hyaline cartilage.
Reason :- These are called vertebrochondral ribs
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- The \( 11^{th} \) & \( 12^{th} \) Pairs of ribs are not connected dorsally and therefore they are called floating ribs.
Reason :- Thoracic vertebrae, lumbar vertebrae, sternum and ribs together forms the rib cage.
(a) A
(b) B
(c) C
(d) D
Answer: D

Question. Assertion :- Bones of the limbs along with girdles forms the appendicular skeleton.
Reason :- Each arm of human has 30 bones.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- In human wrist formed by 8 bones.
Reason :- In human palm formed by 5 bones.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Femur is the longest bone of the human body.
Reason :- Femur is formed by the fusion of Tibia and Fibula.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Patella is a sesamoid bone.
Reason :- It articulates with three bone.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Scapula is a large triangular flat bone situated in the ventral part of the thorax between the \( 2^{nd} \) and \( 7^{th} \) rib.
Reason :- The ventral, flat triangular body of scapula has an elevated ridge called spine.
(a) A
(b) B
(c) C
(d) D
Answer: D

Question. Assertion :- Fibrous joint do not allow any movement.
Reason :- The bones involved in fibrous joint are joined together with the help of cartilage.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Human body cells exhibit three type of movements, amoeboid, ciliary and muscular.
Reason :- Macrophage show amoeboid movement, ciliated epithelium. Show ciliary movement limbs and tongue show muscular movement.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- A cup shaped bone patella cover the knee ventrally.
Reason :- Patella is a sesamoid bone.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Red fibres can also be called aerobic muscles.
Reason :- Red fibres contain plenty of mitochondria which can utilise large amount of oxygen stored them.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Osteoporosis is characterised by decreased bone mass & increased chances of fractures.
Reason :- Estrogen level increase in old age & excreted with urine.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- Sarcomere is distance between two I-bands.
Reason :- Sarcomere is unit of unstripped muscle.
(a) A
(b) B
(c) C
(d) D
Answer: D

Question. Assertion :- Clavicle is a long slender bone with two curvatures.
Reason :- Clavicle is called as collar bone.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- Cardiac muscles are the muscles of heart.
Reason :- Heart muscles are striated, branched & involuntary.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- All movements are not locomotion.
Reason :- Only some of the movements result in a change of place or location.
(a) A
(b) B
(c) C
(d) D
Answer: A

Question. Assertion :- Muscle contraction is initiated by a signal sent by the central nervous system via a sensory neuron.
Reason :- Sensory neuron along with the muscle fibre connected to it constitute a motor unit.
(a) A
(b) B
(c) C
(d) D
Answer: D

Question. Assertion :- Arthritis is inflammation of joints.
Reason :- Gout is inflammation of joints due to accumulation of uric acid.
(a) A
(b) B
(c) C
(d) D
Answer: B

Question. Assertion :- First seven pairs of ribs are called true ribs.
Reason :- Ventrally ribs are attached to thoracic vertebra & dorsally connected to sternum.
(a) A
(b) B
(c) C
(d) D
Answer: C

Question. Assertion :- 40–50% of human body weight consist of muscles.
Reason :- Muscles may be skeletal, involuntary or cardiac which get attached to skeleton.
(a) A
(b) B
(c) C
(d) D
Answer: C