alleryThe thin filament of a muscle fibril is made of two filamentous strands of
Amyosin
Btropomyosin
Ctroponin
Dactin
Answer & Solution
Correct answer: D. actin
1. Each thin filament is built from a repeating protein.
2. It is made of two filamentous, or F, actins helically wound to each other.
3. Each F actin is itself a polymer of monomeric G actins.
4. Tropomyosin runs alongside the actins, and troponin sits on the tropomyosin.
5. Myosin belongs to the thick filament, not the thin one.
_Source: syllabus Biology Ch17 'Locomotion and Movement'_
Keep practising Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis
Browse all Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis questions for AP Biology, or explore more Biology topics.
Related questions
Follow the filtrate down to urineWhich protein runs alongside the actin filaments throughout their length?The two parts of a meromyosin are calledThe thick filament of a muscle fibril is a polymer ofIn a resting muscle, the active binding sites on actin are masked byThe functional unit of a muscle fibril, lying between two successive Z-lines, is theThe dark band of a muscle fibril, containing myosin, is called theThe band of a muscle fibril that contains only actin is the