NEET and AIPMT NEET Zoology Locomotion and Movement MCQ Questions Solved


The human skull has 22 bones with ..................cranial bones and ............................ facial bones

1. 10,12                            2. 14,8

3. 12,10                            4. 8,14

Cranial bones: Frontal,Occipital, Ethmoid, Sphenoid,Parietal [2] and temporal [2]

Facial bones: Vomer, Mandible, Inferior nasal concha [2], Nasal[2], Maxilla [2], Palatine[2], Zygomatic [2] and Lacrimal[2]

Difficulty Level:

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Which of the following has ATPase activity?

1. Actin                            2. Tropomyosin

3. Head of myosin             4. Troponin

Myosin head has a site for binding to ATP and cleaving of ATP provides energy for cross bridge formation and pulling of actin by myosin.                         

Difficulty Level:

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The ATPase activity of the myosin head is dependent on:

(1) Magnesium ions

(2) Manganese ions

(3) Calcium ions

(4) Ferric ions

(3) The ATPase activity is used to cleave ATP for crosss bridge formation. Myosin has ATPase activity. This activity is Calcium dependant.

Difficulty Level:

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Skeletal muscle bundles [fascicles] are held together by a common connective tissue layer called:

1. Perimysium

2. Endomysium

3. Fascia

4. Aponeurosis

Answer:  3

Read page 304, XI NCERT

Difficulty Level:

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The neurotransmitter released at the neuro-muscular junction is:

1. Adrenaline

2. Nor-adrenaline

3. Dopamine

4. Acetylcholine

Answer:       4

Read page 307, XI NCERT

Difficulty Level:

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During muscle contraction, the length of all the following gets reduced except:

1. H-Zone

2. A-Band

3. I-Band

4. Sacromere

Answer:  2

Read page 307,XI NCERT

Difficulty Level:

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What is true about the white muscle fibers?

1. Myoglobin content is high

2. They have large number of mitochondria

3. They depend on anaerobic process for energy

4. They are adapted for slow sustained activities

Answer :   3

Read page 308, XI NCERT

Difficulty Level:

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Which of the following is not a cranial bone?

1. Zygomatic

2. Sphenoid

3. Ethmoid

4. Parietal

Read page 309, Figure 20.6, XI NCERT

Difficulty Level:

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The human ribs are termed as bicephalic because:

1. They have two articulations surfaces on their ventral end

2. They have two articulations surfaces on their dorsal end

3.  They have two articulations surfaces on their ventral end and two on dorsal end

4. They have two articulations surfaces on their ventral end and one on dorsal end

Answer: 2

Read page 310, XI NCERT

Difficulty Level:

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The clavicle articulated with the:

1. Xiphoid process of the sternum

2. Acromion of the scapula

3. Glenoid cavity of the scapula

4. Head of the humerus

Answer:  2

Read page 311, XI NCERT

Difficulty Level:

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