Which pairing correctly matches the main proteins in thic...

Which pairing correctly matches the main proteins in thick vs thin filaments of skeletal muscle?

easy

AThick = actin; Thin = myosin

Thick = myosin; Thin = actin (with troponin/tropomyosin)

CThick = collagen; Thin = elastin

DThick = keratin; Thin = tubulin

EThick = hemoglobin; Thin = myoglobin

Explanation

Thick filaments are mainly myosin. Thin filaments are mainly actin plus regulatory proteins troponin and tropomyosin. Collagen/elastin are connective tissue proteins, not sarcomere filaments.

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