MCQ – 74220

In the following electron micrograph of the sarcomere correctly identify the area labeled as “E”?

A.	A-band
B.	I-band
C.	M-band
D.	H-zone

Show Answer

Correct Answer � B Explanation

Ans: B- I-band

• Area marked, as ‘E’ is lighter & isotropic band = I-band.
• Contains-Dark Z-line at its center.
• The light I band divided by dark Z line & dark A band has a lighter H band in its center.
• M line – Transverse line seen in the middle of H hand.
• Sarcomere – Area between two adjacent Z lines.

• (A: A-band ; B: Actin filaments; C: Sarcomere width; D: H-zone).