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Locomotion and Movement

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CBSE Gujarat Board Haryana Board

## Previous Year Papers

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Class 10 Class 12
Describe the structure of myosin filament ?

Myosin filament : Each myosin (thick) filament is  a polymerised monomeric proteins. The monomeric units are called Meromyosins. These constitute make one thick filament.

Each meromyosin has two important parts, a globular head with a short arm and a tail, the former being called the heavy meromyosin (HMM) and the latter, the light meromyosin (LMM). The HMM component, i.e.; the head and short arm projects outwards at regular
distance and angle from each other from the surface of a polymerised myosin filament and is known as cross arm. The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin.

Thick filament (above) and a myosin molecule (below)

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how many pairs of floating ribs are present in humns?

2
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Which pairs are called false ribs?

8th, 9th and 10th pairs of ribs are called as false ribs or vertebrondral ribs.
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Total number of pair of ribs?

12
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What is the rib cage made of ?

The thoracic vertebrae, ribs and sternum together form the rib cage.
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What is gout ?

Gout is the inflammation of joints due to accumulation of uric acid crystals.
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