Question

Dark bands are

• A. $A$-band
• B. $B$-band
• C. $I$-band
• D. $Z$-line

Answer 1

Answer: (A)

$A$-band

Answer 2

A myofibril has dark and light bands. The dark bands are called A bands (Anisotropic bands). Light bands are called $I$ bands (isotropic bands).