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The number of thick myofilaments (myos...

The number of thick myofilaments (myosin ) surrounding single thin myofilament ( actin) are

A

3

B

6

C

2

D

4

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The correct Answer is:
A
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The myosin myofilament can be cleaved into a head and a tail piece. All of the following are accurate in describing the position of myosin in a sacromere except (i) A-band is the length of a myosin myoilaments (ii) A-band contains thin and thick myofilaments (iii) A-band does not include actin-binding sites

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Which myofilaments slide in a sarcomere during contraction ?

Read the following statements and select the correct option : I. In the skeletal muscles fibre, large number of myofilaments are arranged in the sarcoplasmic . II. The central part of an anisotropic band where the only thick , filament is present and thin filament is absent is called 'A' band. III. In the resting state , a tropomyosin protein masks the active b binding sites for myosin on the active filaments . IV. The junction between a motor neuron and the sarcolemma of the muscle fibres is called motor-end plate.

an inflorescence having a number of achlamydeous male flowers surrounding a single achlamydeous female flower is

Fill in the blanks. The thin filaments of myofibril contain (A) actin and two filaments of (B) protein along with (C) protein for masking blinding site for myosin.

AAKASH INSTITUTE-LOCOMOTION AND MOVEMENT-EXERCISE
  1. Sheet or band of fibrous connective tissue that is deep to the ...

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  2. Contractile unit of muscle is part of myosfibril between

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  3. The number of thick myofilaments (myosin ) surrounding single th...

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  4. At rest, when mucsle is relaxed, thin filaments interdigitate with thi...

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  5. The ion that must be present in adequate amount for the binding of cro...

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  6. In which cateory of muscle of muscle contraction the filament tha...

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  7. According to sliding filament theory of muscle contraction, the filame...

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  8. Anaerobic work becomes painful due to the accumulation of

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  9. The lactic acid generated during muscle contraction is flnally convert...

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  10. Which bone is keystone of the cranial floor ?

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  11. Which is the only movable skull bone other than auditory oss...

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  12. Which if the best distinguishing feature of thoracic vertebrae ?

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  13. Which of the following ribs are not connected ventrally with t...

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  14. Which part can be easily felt as high point of shoulder ?

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  15. During walking talus Passes/transmits about the half of the we...

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  16. A cricket player is fast chasing ball in the field.Which one of the fo...

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  17. Lower jaw is made up to

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  18. Sella turcica, a depression enclosing the pituitary gland is found in

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  19. Odontoid process is present with which vertebrae of vertabral column ?

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  20. How many vertebra-chondral ribs are present in the human ?

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