Please refer to Chapter 20 Locomotion and Movement MCQ Class 11 Biology with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Biology. Students should refer to MCQ Questions for Class 11 Biology with Answers to score more marks in Grade 11 Biology exams. Students should read the chapter Locomotion and Movement MCQ Class 11 Biology and then attempt the following objective questions.

MCQ Questions Class 11 Biology Chapter 20 Locomotion and Movement

The Locomotion and Movement MCQ Class 11 Biology provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.

Question. Osteoporosis, an age-related disease of the skeletal system may occur due to :-
(a) Immune disorder affecting neuromuscular junction leading to fatigue
(b) High concentration of Ca⁺⁺ and Na⁺ in ECF 
(c) Decreased level of estrogen
(d) Accumulation of uric acid leading to inflammation of joints

Question. Given below is the diagrammatic representation of a sarcomere. Mark the option with a correct description of the structure labelled as A, B, C and D in the same.

(a) A-Elastic fibre that bisects I-band C-Width of this band reduces during muscle contraction
(b) B-Consist of myosin filaments C-Width of this band remains same during muscle contraction
(c) B-Light band that contains actin filaments D-Doesn’t exist when the sarcomere get maximally contracted
(d) A- Z-line, to which thin filaments are firmly attached D- H-zone, which can be seen in a maximally contracted muscle fibre also

Question. The membrane sarcolemma is found over
(a) Heart
(b) Muscle fibre
(c) Nerve fibre
(d) Both (a) and (b)

Question. Why is a human rib known to be bicephalic?
(a) It is made up of two different bones.
(b) It has two articulation surfaces on its ventral end.
(c) It has two articulation surfaces on its dorsal end.
(d) Both (a) and (b)

Question. How many of the given statements are incorrect?
A. The sternum is a part of the axial Skeleton.
B. 5 pairs of ribs are not true ribs
C. Limbs are part of the appendicular skeleton.
D. Pectoral girdle connects sternum to the femur
(a) None
(b) One
(c) Two
(d) All

Question. Vertebral formula for an adult human is :-
(a) C₇T₁₂L₅S₅Co₄
(b) C₇T₁₂L₅S₍₅₎ Co₍₄₎
(c) C₈T₁₂L₅S₍₅₎ Co₍₄₎
(d) C₇T₁₂L₄S₍₅₎ Co₍₁₎

Question. How many of the following features are applicable to the hormones?
i. Non-nutrient chemicals
ii. Intracellular messengers
iii. Released in blood or open spaces
iv. Produced in trace amounts
(a) None
(b) One
(c) Two
(d) Three

Question. Find the incorrect statement:
(a) Each rib in human is attached at one end to the vertebral column and at the other end to sternum and is therefore called dicephalic.
(b) There are 12 pair of ribs, each pair of which is attached to one thoracic vertebra.
(c) Each rib is a C shaped flat bone
(d) First 7 pair of ribs are attached to sternum with the help of a hyaline cartilage.

Question. Which one of the following pituitary hormones do not have a particular target gland o act upon?
(a) TSH
(b) STH
(c) FSH
(d) ACTH

Question. If a cell receives a signal to contract, then its neighbours are also stimulated to contract.
This is due to the presence of:
(a) Tight junction
(b) Sarcoplasm
(c) Desmosomes
(d) Intercalated disc

Question. The condition in which the blood potassium levels are increased is known as
(a) Hypercholesterolemia
(b) Hyperkalemia
(c) Osteomalacia
(d) Hyper excitability

Question. Which of the following pairs of organs includes the endocrine glands only ?
(a) Parathyroid and Suprarenal
(b) Pancreas and Parathyroid
(c) Thymus and Testes
(d) Adrenal and Ovary

Question. Select the correct match from the following options.
(a) Nissl’s granules – found in axon.
(b) Non-myelinated neurons of peripheral nervous system –Schwann cells are present but they do not secrete myelin sheath.
(c) Unipolar neuron –Possess one dendrite
(d) Sodium-potassium pump-Transports 2K⁺ into the extracellular fluid.

Question. The human placenta does not secrete which of the following hormone?
(a) Human chorionic gonadotropin(hCG)
(b) Human placental lactogen (hPL)
(c) Androgen
(d) Progestogens

Question. Which of the following statements are true /false?
i. Thyrocalcitonin regulates blood calcium levels.
ii. Oxytocin stimulates contractions of uterine muscles during birth.
iii. Grave’s disease is caused by malfunctioning of the adrenal gland.
iv. ADH stimulates the absorption of water and increased urine production.
(a) i and iii are true ; ii and iv are false
(b) i and ii are true ; iii and iv are false
(c) i and iv are false ; ii and iii are true
(d) I, ii and iii are true ; iv only false

Question. The muscle fatigue occurs due to accumulation of:
(a) Ca⁺⁺
(b) CO₂
(c) Lactic acid
(d) Creatine phosphate

Question. The functional unit of contraction of muscle is :
(a) Muscle fibre
(b) Sarcomere
(c) Fasiculi
(d) Actin and myosin filament

Question. Correctly match list-1 with list-2

List-1	List-2
(A) Cranial bones	(i) 5
(B) Facial bones	(ii) 6
(C) Axial skeleton	(iii) 7
(D) Vertebrochondral ribs	(iv) 8
(E) Lumbar vertebrae	(v) 14
(F) Ankle bones	(vi) 80

(a) A-(i), B-(ii), C-(iii), D-(vi), E-(v), F-(vi)
(b) A-(iv), B-(v), C-(vi), D-(iii), E-(i), F-(ii)
(c) A-(v), B-(iv), C-(vi), D-(ii), E-(i), F-(iii)
(d) A-(iv), B-(v), C-(vi), D-(ii), E-(i), F-(iii)

Question. Which one is not the character of red skeletal muscle?
(a) More mitochondria
(b) More myoglobin
(c) More sarcoplasmic reticulum
(d) More blood capillaries

Question. Find out correct points with the regarding of cardiac muscle.
(A) These are unstriated
(B) These are involuntary
(C) These are branched
(D) They have more mitochondria
(E) They have less blood supply
(a) A, B, C
(b) B, C, D
(c) B, D, E
(d) A, C, E

Question. Which statement is not correct about osteoporosis?
(a) In this bone mass decreased
(b) It is age related disorder
(c) Increased levels of estrogen is a common cause of it.
(Question) In this chances of fractures increased.

Question. Correctly match list-1 with list-2

List-1	List-2
(A) Collar bone	(i) Pectoral girdle
(B) Glenoid cavity	(ii) Pelvic girdle
(C) Acetabulum	(iii) Patella
(D) Knee cap	(iv) Clavicle

(a) A-(i), B-(iv), C-(iii), D-(ii)
(b) A-(i), B-(ii), C-(iii), D-(iv)
(c) A-(iv), B-(i), C-(ii), D-(iii)
(d) A-(iv), B-(ii), C-(i), D-(iii)