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 Multiple Choice QuestionsMultiple Choice Questions

1.

Total number of bones in the hind limb of a man is

  • 21

  • 23

  • 27

  • 30


D.

30

Hind limb of man consists of 30 bones which are as follows:

  1. Femur- 1
  2. Fibula- 1
  3. Tibia- 1
  4. Patella- 1
  5. Tarsals-7
  6. Metatarsals- 5
  7. Phalanges- 14


2.

Assertion : Among the land animals, the Cheetah can run fastest over the ground.

Reason : The Cheetah uses its powerful forelimbs to push itself forward during running. 

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true.


D.

If Assertion is false but Reason is true.

Cheetah is the most successful runner among quadrupedal animals. Because of its specially developed forelimbs and bodyshape, it acquires the power of fastest running over the ground. During running, it uses its powerful forelimbs to push itself forward.


3.

Neural canal is present in :

  • humerus

  • tibia-fibula

  • vertebral column

  • cranial bones


C.

vertebral column

A typical vertebra has a centrum or body and nerval arch. The hole formed by the neural arch is the vertebral foramen. The vertebral formaina of all vertebrae form the vertebral canal or neural canal.


4.

Which of the following is a transparent tissue

  • Tendon

  • Hyaline cartilage

  • Fibrous cartilage

  • All of these


B.

Hyaline cartilage

Hyaline cartilage has a clear, homogenous, transparent bluish-green matrix. It gives glass like appearance. A few bundles of small white fibres are imbedded in the matrix. It is present in the end of limb bones (called hyaline caps).


5.

The contractile protein of skeletal muscle involving ATPase activity is

  • tropomyosin

  • myosin

  • α-actinin

  • troponin


B.

myosin

The kinesin, myosin and dynein proteins of skeletal muscle involve ATP as activity. This cause the contraction of skeletal muscles, propelling action of cillia and flagella the intracellular transport of organelles. 

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6.

Assertion : Rheumatoid arthritis is an inflammation of the synovial membrane in synovial joints.

Reason : Infectious arthritis mostly occurs due to bacterial and viral infection.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true


B.

If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

Rheumatoid arthritis is an autoimmune disease, meaning that our immune system attacks the tissues in the joints, resulting in inflammation. The exact cause of rheumatoid arthritis is not known, but it is thought that genetic factors may be involved, and that infection may trigger the development of this disease in some people.


7.

Given diagram shows bone of the left human hindlimb as seen from front. It has certain mistakes in labeling. Two of the wrongly labelled bones are

  • tibia and tarsals

  • femur and fibula

  • fibula and phalanges

  • tarsals and femur


C.

fibula and phalanges

In the above figure, two parts of hindlimb that are wrongly marked are fibula and phalanges. 


8.

Which one of the following is a sesamoid bone?

  • Pelvis

  • Patella

  • Pterygoid

  • Pectoral girdle


B.

Patella

Patella is a sesamoid bone. Sesamoid bones are formed by ossification of a tendon where the tendon moves over a bony surface.


9.

Sigmoid notch is formed by :

  • cavity formed by humerus

  • cavity formed by radio ulna

  • cavity formed by tibia fibula

  • cavity formed by femur


B.

cavity formed by radio ulna

Radius and ulva are the bones of the fore-arm. Which are closely held together. The ulna is the long bone and bear a deep sigmoid notch for articulation with the trochlea of the humerus.


10.

The thin filaments of a muscle fibre are made up of

  • actin, troponin, tropomyosin

  • actin, troponin

  • myosin, troponin

  • actin, tropomyosin


A.

actin, troponin, tropomyosin

The thin filaments of a muscle fibre are made up of actin, troponin and tropomyosin. One thin filament probably contains 300-400 actin molecules, about 50 tropomyosin and 50 troponin. It is said that tropomyosin plays a vital role in sensitizing the contractile proteins (actin and myosin) to calcium ions.