0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

The myosin filaments appear dark under microscope due to
  1. Dark colour
  2. Melanin colour
  3. Black colour
  4. Double refractive index

A
Melanin colour
B
Double refractive index
C
Dark colour
D
Black colour
Solution
Verified by Toppr

Myofibrils, which are threadlike structures, run lengthwise through the muscle fiber. They consist of even smaller structures, the myofilaments, or simply filaments. There are two types of myofilaments - myosin and actin filaments. Myosin filaments are thick, consisting mainly of the protein myosin. The thin actin filaments consist mostly of the protein actin; they also contain the proteins tropomyosin and the troponin complex that regulate the actin filaments interaction with myosin filaments. The filaments overlap lengthwise in the muscle fibers, producing the pattern of transverse bands or striations characteristic of striated muscle. The striations of striped muscles result from the fact that the thick and thin filaments have different refractive indices in the light microscope. Thus, myosin filaments appear dark.

Was this answer helpful?
0
Similar Questions
Q1
The myosin filaments appear dark under microscope due to
View Solution
Q2
Dark field microscope was invented by
View Solution
Q3
Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour?
View Solution
Q4
When stained with a certain dye, the chromosomes show alternate light and dark bands known as Q-bands under the microscope. Name the dye.
View Solution
Q5
A soap film of thickness 0.3 μm appears dark when seen by the refracted light of wavelength 580 nm. What is the index of refraction of the soap solution, if it is known to be between 1.3 and 1.5?
View Solution