KCET 2014 Biology Solved Paper

The two projections of each myosin molecule (golf club heads) are called meromyosin heads that have a short arm (also known as heavy meromyosin or HMM). The heads project outward from the shaft in a spiraling fashion at a specific angle and distance.This is called a cross arm. Each head is an active ATPase enzyme and contains actin active sites and ATP binding sites