Advertisements
Advertisements
प्रश्न
Write the differences between Actin and Myosin.
Advertisements
उत्तर
| Actin | Myosin | |
| 1. | Found in both A and I bands. | Found exclusively in A band of sarcomere. |
| 2. | Thinner (0.005 mm), but shorter (2-2.6 mm) than myosin filaments. | Thicker (0.01 mm) and longer (4.5 mm) than actin filaments. |
| 3. | Cross bridges are absent, resulting in a smooth surface. | Cross bridges are present, resulting in a rough surface. |
| 4. | They are more numerous than myosin filaments, with six surrounding each one. | Fewer than actin filaments. |
| 5. | Free at one end and linked to the Z-line at the other end. | Free at both ends. |
| 6. | Consists of three proteins: actin, tropomysin, and troponin. | Consists of two proteins: myosin and meromyosin. |
| 7. | Slide into the H zone during muscule contraction. | Do not slide during muscle contractions. |
संबंधित प्रश्न
Draw the diagram of a sarcomere of skeletal muscle showing different regions.
Write true or false. If false, change the statement so that it is true:
Actin is present in thin filament
Write true or false. If false, change the statement so that it is true:
H-zone of striated muscle fibre represents both thick and thin filaments.
Write the difference between:
Red and White muscles
Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely ______ and ______.
In a muscle fibre Ca++ is stored in ______.
Read the following statements.
- Bands are dark bands and contain myosin
- I bands are light bands and contain actin
- During muscle contraction, the A band contracts.
- The part between the two Z - lines is called a sarcomere.
- The central part of the thin filament, not overlapped by the thick filament is called Hzone.
Of the above statements
Myoglobin occurs in
In a skeletal muscle, bundles of muscle fibres are held together by ______.
Which of the following statements wrongly represents the nature of smooth muscle?
Match the following and mark the correct option
| Column I | Column II |
| A. Fast muscle fibres | i. Myoglobin |
| B. Slow muscle fibres | ii. Lactic acid |
| C. Actin filament | iii. Contractile unit |
| D. Sarcomere | iv. I-band |
Muscles with characteristic striations and involuntary are ______.
Sarcolemma, sarcoplasm and sarcoplasmic reticulum refer to a particular type of cell in our body. Which is this cell and to what parts of that cell do these names refer to?
Three types of muscles are given as a, b and c. Identify the correct matching pair along with their location in human body:
Name of muscle/location
