Class XI

Discovery of actin is credited to
  1. John Kendren
  2. Halliburton
  3. Pollard and Korn
  4. Straub
Select the correctly matched pair :
  1. 9th & 10th pair of ribs →→ true ribs
  2. First eight pair of ribs → true ribs
  3. 9th & 10th pair of ribs → false ribs
  4. 11th& 12th pair of ribs → floating ribs
The upright posture in humans is facilitated by :
  1. radius and ulna
  2. massive hindlimb bones making broad feet
  3. only pelvis
  4. massive hind limb bones making broad feet and pelvis
Match the following bones and their synonyms : column A a) Hipbone b) Kneebone c) Collarbone d) immovable joint column B i) patella ii) clavicle iii) suture iv) innominate
  1. a)-iii, b)-ii, c)-iv, d)-ii
  2. a)-ii, b)-iii, c)-i, d)-iv
  3. a)-iv, b)-i, c)-ii, d)-iii
  4. a)-iv, b)-ii, c)-iii, d)-i
The property which doesn’t belong to muscle fibres is :
  1. Contractility
  2. conductivity
  3. elasticity
  4. Excitability
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