MCQ
From given characters about structure of contractile proteins actin which option contain wrong characters :
(i) Each actin filament is made of two 'F' (filamentous) actins helically wound to each other.
(ii) Many monomeric proteins called meromyosins constitute one thick filament.
(iii) Two filaments of protein, troponin run close to the 'F'actins throughout its length.
(iv) Each meromyosin has two important parts, a globular head with a short arm called the heavy meromyosin (HMM) and a tail, called the light meromyosin (LMM).
(v) In the resting state a subunit of tropomyosin masks the active binding sites for myosin on the actin filaments.
(vi) Each 'F' actin is a polymer of monomeric 'G' (Globular) actins.
(vii) The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for thin filament.
(i) Each actin filament is made of two 'F' (filamentous) actins helically wound to each other.
(ii) Many monomeric proteins called meromyosins constitute one thick filament.
(iii) Two filaments of protein, troponin run close to the 'F'actins throughout its length.
(iv) Each meromyosin has two important parts, a globular head with a short arm called the heavy meromyosin (HMM) and a tail, called the light meromyosin (LMM).
(v) In the resting state a subunit of tropomyosin masks the active binding sites for myosin on the actin filaments.
(vi) Each 'F' actin is a polymer of monomeric 'G' (Globular) actins.
(vii) The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for thin filament.
- A(i), (v) and (vi)
- B(ii), (iii), (iv), (v) and (vii)
- C(ii), (iv) and (vii)
- ✓(iii) and (v)