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NCERT Exemplar · Class 11 · Biology

Chapter 20: Locomotion and Movement

Practice each question, then open the answer or worked solution.

Multiple Choice Questions

14 questions
Q11Multiple choice

Which one of the following statements is incorrect?

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Correct option: C
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Worked solution

Ans: (c) The muscles located in the inner walls of the alimentary canal are striated and involuntary.

Explanation: These are smooth muscles which are non-striated.


Q12Multiple choice

Which one of the following statements is true?

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Correct option: B
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Worked solution

Ans: (b) Head of humerus bone articulates with glenoid cavity of pectoral girdle.

Explanation: Head of humerus bone articulates with glenoid cavity of pectoral girdle which results in formation of ball and socket joints. 


Q13Multiple choice

Muscles with characteristic striations and involuntary are

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Correct option: B
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Worked solution

Ans: (b) Muscles of the heart

Explanation: Cardiac muscles are striated and involuntary.


Q14Written answer

Explanation: Atherosclerosis is the deposition of cholesterol in artery-

Column I

Column II

A. Sternum 

(i) Synovial fluid

B. Glenoid cavity 

(ii) Vertebrae

C. Freely movable joint 

(iii) Pectoral girdle

D. Cartilaginous joint 

(iv) Flat bones


Options: 

(a) A – (ii), B – (i), C – (iii), D – (IV) 

(b) A – (IV), B – (iii), C – (i), D – (ii) 

(c) A – (ii), B – (i), C – (iv), D – (iii) 

(d) A – (IV), B – (i), C – (ii), D – (IV) 

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Worked solution

Ans: (b) A – (IV), B – (iii), C – (i), D – (ii)