CBSE Class 11 Biology Locomotion and Movement MCQs Set C

Question. The hardest substance present in the
(a) Bone– Ossein
(b) Chitin – Protein
(c) Tooth– Enamel
(d) Muscle–Myosin

Answer : C

Question. What is correct about human body
(a) There are 5 vertebra in the neck
(b) Brain box is made up of 4 bones
(c) There are 15 pairs of ribs
(d) There are 12 thoracic vertebra

Answer : D

Question. Ciliary muscles are found in
(a) Diaphragm of a mammal
(b) Eyes of vertebrates
(c) Heart of vertebrates
(d) Stomach of frog

Answer : B

Question. Heart beat is controlled by a nodal tissue which is made up of specialised cardiac muscles, called
(a) Purkinje fibres
(b) Myonemes
(c) Collagen fibres
(d) Telodendria

Answer : A

Question. Contraction of shortest duration are present is-
(a) Heart muscle
(b) Lungs muscle
(c) Leg muscle
(d) Eyelids muscle

Answer : D

Question. Find out the incorrect statement-
(a) Muscle fibre is a syncitium as the sarcoplasm contains many nuceli.
(b) A characterstic feature of the muscle fibre is the presence of a large number of parallely arranged filaments in the sarcoplasm called myofilaments or myofibrils.
(c) Actin & myosin are rod like structures, arranged perpendicular to each other and also to the longitudnal axis of myofibrils
(d) The protein of the myofibril between 2 successive Z-line is considered as the functional unit of contraction, is called a sarcomere.

Answer : C

Question. Find out the set of correct statements
(A) Meromyosin is the monomeric protein of myosin.
(B) Each meromyosin has head as HMM and tail as LMM
(C) Increase in Ca2+ level leads to binding of Ca with a subunit of tropomyosin on actin filament
(D) ATP hydrolysis is done by myosin head to make cross bridge.
(a) A, B
(b) A, B, C
(c) B, C, D
(d) A, B, D

Answer : D

Question. The smallest bone in rabbit’s or man’s skeleton is
(a) Nasal
(b) Stapes
(c) Patella
(d) Palatine

Answer : B

Question. In man the axial skeleton is made up of
(1) 80 bones
(2) 100 bones
(3) 103 bones
(4) 106 bones

Answer : A

Question. Papillary muscles are found in
(a) Haemocoel
(b) Heart of cockroach
(c) Arm
(d) Heart of mammal

Answer : D

Question. Sarcolemma is a membrane found over in
(a) Nerve fibre
(b) Cardiac muscle
(c) Skeletal muscle fibre
(d) Heart

Answer : C

Question. When there is a drop in the force of contraction after prolonged stimulation, it is known as
(a) Muscle tone
(b) Muscle atrophy
(c) Muscle fatigue
(d) Muscle dystrophy

Answer : C

Question. During muscle contraction
(a) Chemical energy is changed into electrical energy
(b) Chemical energy is changed into mechanical energy
(c) Chemical energy is changed into physical energy
(d) Mechanical energy is changed into chemical energy

Answer : B

Question. Major protein in the thick filament of skeletal muscle fibre is
(a) Tropomysin
(b) Myosin
(c) Actin
(d) Tropnin

Answer : B

Question. Flexion of thigh, knee and their rotation is facilatated by
(a) Biceps muscle
(b) Triceps muscle
(c) Sartorius muscles
(d) Shank

Answer : C

Question. The time period between the beginning of electrical response and peak of tension recorded is
(a) Contraction time
(b) Latent period
(c) Refractory period
(d) Relaxation time

Answer : A

Question. The special contractile protein actin is found in
(a) Thick filaments of A–bands
(b) Thin filaments of I–bands
(c) Both thick and thin bands
(d) Whole of myofibril

Answer : B

Question. The number of vertebrae in rabbit is
(a) 40
(b) 33
(c) 44
(d) 46

Answer : D

Question. The number of floating ribs in human body is
(a) 6 pairs
(b) 3 pairs
(c) 5 pairs
(d) 2 pairs

Answer : D

Question. Sternum of mammal consists of
(a) A xiphisternum and a xiphoid cartilage
(b) 4 sternebrae, a xiphisternum and a xiphoid
(c) 6 sternebrae, a xiphisternum and a xiphoid
(d) 6 sternebrae and a xiphoid cartilage

Answer : C

Question. Lumber vertebra are found in
(a) Neck region
(b) Abdominal region
(c) Hip rigion
(d) Thorax

Answer : B

Question. Which one is odd pair
(a) Femur-Humerus
(b) Tibia-Radius
(c) Axis-Atlas
(d) Tarsal-Carpals

Answer : C

Question. During muscular contraction, the
(a) I–zone will decrease in length
(b) A–zone will decrease in length
(c) Z–zone will decrease in length
(d) H–zone will decrease in length

Answer : A

Question. The contraction of muscle of shortest duration is seen in
(a) Heart
(b) Jaws
(c) Intestine
(d) Eyelids

Answer : D

Question. Name the connective tissue sheath which surrounds the muscle bundles
(a) Epimysium
(b) Endomysium
(c) Perimysium
(d) Sarcomere

Answer : A

Question. What is sprain
(a) More pulling of tendon
(b) Less pulling of tendon
(c) More pulling of ligament
(d) Less pulling of ligament

Answer : C

Question. The last two pairs of ribs are named floating ribs because
(1) Their sternal parts are attached to the sternum directly
(2) Their sternal parts are attached on the 7th pair of ribs
(3) Their sternal parts remain free and do not even reach the sternum
(4) They float in the body cavity

Answer : C

Question. Elastic cartilage is found in
(a) The trachea
(b) The auditory tube
(c) The intervertebral disc
(d) None of these

Answer : B

Question. Action potential in a muscle fibre is
(a) – 90 mV
(b) – 80 mV
(c) 45–50 mV
(d) 90–mV

Answer : C

Question. The term refractory period with reference of muscle tissue refers to
(a) A period when stimulation does not lead to contraction
(b) A period when maximum contraction occurs
(c) Time gap between application of stimulus and occurrence of contraction
(d) Loss of transluscency in muscle fibres due to death of animal

Answer : A

Question. The muscular contraction in which the tension remains the same and the mechanical work is also done is called
(a) Isotonic contraction
(b) Tetanus
(c) Isomeric contraction
(d) Single muscle twitch

Answer : A

Question. Striated muscles contract by -
(a) Sliding of actin filament upon myosin filaments
(b) Sliding of myosin filaments upon actin filaments
(c) Pulling together of myosin filaments
(d) Pulling together of actin filaments

Answer : A

Question. The distance or length of the myofibril between two adjacent Z–bands is called
(a) Sarcomere
(b) Sarcolemma
(c) Fibril
(d) Sarcoplasm

Answer : A

Question. Muscles are red because of the presence of
(a) Myoglobin and mitochondria
(b) Haemoglobin and golgi bodies
(c) Globulin and mitochondria
(d) Protein and lysosome

Answer : A

Question. The functional unit of the contractile system in the striped muscle is
(a) Z–band
(b) A–band
(c) Myofibril
(d) Sarcomere

Answer : D

Question. In a relaxed fibril, H–zone, a lighter region of low density can be seen in the centre of
(a) Anisotropic or A–band
(b) Isotropic or I–band
(c) Z–band
(d) Both in A and I–band

Answer : A

Question. The dark bands in a myofibril are due to overlapping of
(a) Only thick bands
(b) Only thin bands
(c) Both thick and thin bands
(d) None of the above

Answer : C

Question. A ...... muscle rotates the forearm to turn the palm downwards
(a) Pronator
(b) Supinator
(c) Adductor
(d) Abductor

Answer : A

Question. Which one of the following takes place in a myofibril when skeletal muscle contract Light band Dark band H–zone
(a) Shortens Shortens Shortens
(b) Shortens Unchanged Unchanged
(c) Shortens Unchanged Disappears
(d) Unchanged Shortens Shortens

Answer : C

Question. When we lift a heavy object
(a) Triceps contracts and biceps relaxes
(b) Biceps contracts and triceps relaxes
(c) Both biceps and triceps contracts
(d) Both biceps and triceps relax

Answer : B

Question. An all out sprint can not continue for more than 40 seconds because
(a) Run out of oxygen
(b) Accumulation of creatine
(c) Muscles collapse
(d) All of these

Answer : D

Question. Ions that must be present for binding the cross bridges is
(a) Na+
(b) Ca++
(c) K+
(d) None of these

Answer : B

Question. Tetanus is sustained contraction of muscle, is due to-
(a) Parathyroid deficiency
(b) Ca2+ deficiency
(c) Bacterial disease
(d) Auto immune disease

Answer : C

Question. Time period present between two sucessive contraction-
(a) Refractory period
(b) Total period
(c) Break period
(d) Lag period

Answer : A

Question. The bony sockets of the jaws in which the teeth are implanted, are known as
(a) Alveolus
(b) Fossae
(c) Dentaries
(d) Thecae

Answer : A

Question. In the case of most of the mammals including man and Giraffe, the number of cervical vertebrae are
(a) 8
(b) 7
(c) 9
(d) 10

Answer : B

Question. Cervical vertebrae are located in
(1) Thoracic region
(2) Abdominal region
(3) Neck region
(4) Lumbar region

Answer : C

Question. The number of lumbar vertebrae in human vertebral column is
(a) 12
(b) 7
(c) 5
(d) 2

Answer : C

Question. Coccygeal bone is formed by the fusion of ......... bones in man
(a) 3 vertebrae
(b) 6 vertebrae
(c) 5 vertebrae
(d) 4 vertebrae

Answer : D

Question. Inter-vertebral disc is a
(a) Fibro cartilage between the centrum of vertebrae
(b) Pad in the centrum of bone
(c) Cartilage bone in the body
(d) Body of vertebrae

Answer : A