Class XI

yoglobin is found to be : i. highly abundant in muscles of whales and seals . ii. exhibiting cooperative binding of oxygen. iii. allowing organisms to hold their breathe longer underwater.
  1. all statements are correct.
  2. only i) and iii) are correct.
  3. onlyi) and ii) are correct.
  4. only ii) is correct.
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
Which of the following statements is/are incorrect about sliding filament theory of muscle contraction?
  1. during contraction Z lines come closer to together.
  2. both A & B
  3. during contraction width of I and A bands remain the same.
  4. during contraction width of H zone decreases.
Myoglobin was the first protein to have its three-dimensional structure revealed. Ravi was diagnosed with myoglobin in his bloodstream. This had occurred due to :
  1. Arthritis
  2. muscle injury
  3. conversion of Hb into Mb
  4. myasthenia gravis
Study of muscles is called :
  1. Sarcology
  2. myology
  3. Mycology
  4. Musclogy
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