Read the statements regarding muscle proteins and identify the correct statements
i. Actin is a thin filament and is made up of two F-actins
ii. Complex protein, tropomyosin is distributed at regular intervals on the troponin
iii. Myosin is a thick filament which is also a polymerized protein
iv. Globular head of meromyosin consists of light meromyosin (LMN)

i, iii and iv are correct

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i and iii are correct

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i, ii and iii are correct

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i, ii and iv are correct

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ii and iv are correct

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Solution

The correct option is B i, ii and iii are correct
Myofibril is made up of two types of filaments.They are thin filament(actin) and thick filament(myosin).
Each actin (thin) filament is made of two ‘F’ (filamentous) actins helically wound to each other. Each ‘F’ actin is a polymer of monomeric ‘G’ (Globular) actins. Two filaments of another protein, tropomyosin also run close to the ‘F’ actins throughout its length. A complex protein Troponin is distributed at regular intervals on the tropomyosin.
Each myosin (thick) filament is also a polymerized protein. Many monomeric proteins called Meromyosins, constitute one thick filament. Globular head of meromyosin consists of Heavy meromyosin (HMM).
So, the correct answer is 'i, ii and iii are correct'

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Similar questions

Q. Which of the.following statements are correct regarding muscle proteins ?
(i) Actin is a thin filament and is Frock up of two F-actirs.
(ii) The complex protein, tropomyosin is distributed at regular intervals on the troponin.
(iii) Myosin is a thick flament which is also a polymerised protein.
(iv) The globular head of meromyosin consists of light merornyosin (LMM).

Q. Read the statements regarding muscle proteins. Which of the following statement is correct?
(A) Actin is a thin filament and is made up of two F-actins.
(B) The complex protein, tropomyosin is distributed at regular intervals on the troponin.
(C) Myosin is a thick filament, which is also a polymerised protein.
D) The globular head of meromyosin consists of light meromyosin (LMM).

Q. Which of the following statements is/are correct/incorrect?
I. A-bands of the muscle is dark and contain myosin.
II. I-bands are the light bands and contain actin.
III. During muscle contraction, the A-band contracts
IV. The part between the two Z-lines is called a sarcomere.
V. The central part of thin filament, not overlapped by thick filament is called H-zone.
Select the correct answer using the codes given below:

Question 5

Read the following sentences about photosynthesis.
(i) Sunlight, carbon dioxide, chlorophyll and water are necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.
Choose the correct pair of sentences that is true to photosynthesis.
(a) (iii) and (iv) (b) (i) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Q. The correct statement(s) regarding, (i)

H C l O

, (ii)

H C l O_{2}

, (iii)

H C l O_{3}

and (iv)

H C l O_{4}

, is (are)

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