Which of the
following give/s striped appearance to myofibrils?
a) light band only
b) alternate light and dark bands
c) dark bands only
d) none of these
Myofibril consists of smaller contractile unit called…….
a) actin
b) myosin
c) troponin
d) sarcomere
Explanation: A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments actin and myosin
The dark bands of each sarcomere are….
a) A-band
b) I-band
c) H-zone
d) M-line
Explanation: A-band for anisotrpic
The light bands of
each sarcomere are …
a) A-band
b) I-band
c) H-zone
d) M-line
Explanation: I-band for isotrpic
Each A-band has lighter strip in its midsection called…….
a) Z-line
b) I-band
c) H-zone
d) M-line
Explanation: H for hele which means bright
H-zone of A-band is bisected by……..
a) Z-line
b) I-band
c) H-zone
d) M-line
Explanation: M for medial
